DE3241606A1 - Electric coffee machine with a centrifugal filter - Google Patents

Abstract

The invention relates to an electric coffee machine with a centrifugal filter which is coupled releasably in operating terms to an approximately vertical drive shaft and to which brewing water can be fed from a water heater. The object is to provide a coffee machine of this type which is reliable to use and which can be cleaned easily. To achieve this object, it is proposed to make the centrifugal filter connectable to the lower end of the drive shaft and a hot-water pipe extending from the water heater. The advantage of this solution is that the sprayed-off coffee is collected in a collecting pan surrounding the centrifugal filter at least laterally and from the underside and can flow out through outflows, formed in the bottom of said collecting pan, directly into coffee cups arranged underneath it. <IMAGE>

Description

Electric coffee maker with a centrifugal filter

The invention relates to an electric coffee machine with a centrifugal filter, which is operatively releasably coupled to an approximately vertical drive shaft and can be supplied to the brewing water from a water heater.

Such a coffee machine is known from DE-GM 80 23 498 The centrifugal filter is attached to the drive shaft from above and sucks, as soon as it rotates, the water from a water bowl arranged below. Of the Coffee that is thrown off must be collected in a ring-shaped channel and silver on the side drained the area of the water bowl to drains, under the cups can be placed under. The coffee therefore covers a relatively long distance and wets in the process relatively large wall surfaces that remove heat from it. Another disadvantage is that these parts also have to be cleaned afterwards. The centrifugal filter also runs after the engine has been switched off, especially because of the associated with it stationary rotor of the motor contains a not inconsiderable amount of energy. The user can therefore injure himself on the centrifugal filter that is still running, if no special one Safety devices are provided and he opens the cover before the Filter has come to a standstill.

The invention is based on the object of a coffee machine to create the type described above, which these disadvantages avoids and which is, in particular, safer to use and easier to clean The object is achieved according to the invention in that the centrifugal filter with the lower end of the drive shaft and a hot water pipe from the water heater ver.

is bindable. To connect the centrifugal filter to the hot water line in To bring a connection9 it is sufficient to put the hot water pipe over an opening or openings to let the same end.

This solution has the advantage that the sprayed coffee is in one The collecting tray surrounding the centrifugal filter at least on the side and from the underside collected and arranged directly below through outlets formed in their bottom Coffee cups can leak, resulting in shorter distances and fewer parts get dirty.

The centrifugal filter is preferably rotatable in the collecting tray arranged and this operationally releasable on a non-rotating component of the Coffee machine, preferably on a supporting the drive shaft, elastic in a housing of the coffee machine mounted assembly of the coffee machine can be fastened is. The drip tray can be used as a handle for removing from the device or attaching and Coupling of the centrifugal filter be designed. This has the great advantage that if the user immediately after the coffee has been made while the Centrifugal filter the maseine by removing the drip tray together with the The centrifugal filter arranged in it opens, the centrifugal filter from the one with a large mass afflicted and long trailing motor shaft is freed and due the friction in the drip tray will quickly come to a standstill. Even if the If the user touches the centrifugal filter while it is still running, no major damage can be caused arise because the centrifugal filter for sic only a relatively small force owns.

The drip tray can, preferably at its bottom, a pivot bearing have for storage of the centrifugal filter on which the centrifugal filter is facing can be attached to the coffee machine. To the above described Task to serve as a handle for removing and attaching the centrifugal filter to meet, the drip tray can be attached to the rest of the coffee machine State hold the centrifugal filter in a position in which it is arranged Coupling elements are in driving engagement with coupling elements of the drive shaft. The drip tray also preferably has a preferably radial to the axis of rotation handle protruding transversely of the centrifugal filter. It is also preferably by means of a bayonet lock attached to the rest of the coffee machine and by turning releasable around the axis of rotation of the centrifugal filter. Next one can be in the circuit of the drive motor lying switch when loosening or attaching the drip tray be operated by this. On the one hand, this can have a safety function, by preventing the coffee machine from being installed without a centrifugal filter is set in motion and a user turns to the then accessible rotating The coupling on the drive shaft is damaged, or the engine is damaged by overspeed achieved.

On the other hand, this makes the machine simple in a simple manner by attaching the centrifugal filter together with the drip tray be set as soon as the drip tray is securely attached.

The hot water line preferably has a shut-off valve and it there may be an actuator for this, which the shut-off valve with a time delay after the motor is switched on to ensure that that first the dry ground coffee is well distributed and solidified in the filter and only then the brewing water is supplied.

This actuator can be made up of a solenoid valve with a timer. However, also can one by hand operated shut-off valve can be used.

In this case, the user places the drip tray with the inside arranged centrifugal filter to the device, whereby e.g. the motor is already in Gear is set After a short moment, he opens the water valve and lets it do so opened until the desired amount of coffee has run out and closes it then again. Then he removes the drip tray with the centrifugal filter Device from, whereby this is shut down again and preferably only the heating the water heater, which has a separate switch, remains switched on, in order to have a hot water reserve ready for the preparation of further cups The motor shaft of the electric motor of the device can form the drive shaft or it can be a for Motor shaft coaxial shaft, which can be connected to it by means of a simple hose coupling is connected to form the drive shaft. This arrangement has the advantage that the The rotor of the motor acts as a counterweight to the centrifugal filter and creates a build-up can largely prevent vibrations in the elastically suspended assembly The gyroscopic effect may also play a significant stabilizing role Role For the overall arrangement, however, it can have advantages to position the motor on the side to move so that the drive shaft is parallel to the motor shaft driving it extends, in which case the drive shaft is then expediently a stabilizing flywheel 9 which, depending on the arrangement, either acts as a counterweight to the filter 9 in the imbalances that generate vibrations due to the uneven storage of the coffee grounds may occur; or the flywheel represents an additional mass that causes that the imbalances have less of an effect because they have a lower percentage affect the mass In addition, gyroscopic forces stabilize the position in both cases. The flywheel is preferably arranged in the upper end region of the drive shaft.

The lid of the centrifugal filter can have a central water supply opening have as well as a coupling element arranged centrally therein, which with the rest Cover by propeller-like employed, a conveying effect in the interior of the Centrifugal filter can be connected inside having supporting ribs. It is natural also possible to introduce the brewing water from below into the centrifugal filter, what however, has the disadvantage that this is a relatively complicated part of the Hot water line must be formed in the drip tray and this one preferably Have a sealed connection to the rest of the hot water pipe or to the water heater got to. The hot water pipe preferably surrounds a lower end portion of the drive shaft and forms an open towards the water supply opening of the centrifugal filter Water chamber, which is expedient to achieve a symmetrical water supply in the centrifugal filter surrounds the shaft completely.

However, an eccentric supply of the brewing water, e.g. in the direction parallel to the drive shaft, produce useful results, since that is the case the hot water pipe exiting in the centrifugal filter water in this first deflected outwards and then accelerated to a certain peripheral speed must be and can be well distributed even with eccentric feed.

According to an alternative embodiment, the drive shaft can be hollow be designed and form part of the hot water pipe. This has the advantage that the supply of hot water into the centrifugal filter is easier because the drive shaft is only inserted through the lid of the centrifugal filter must protrude. The brewing water is then from the lower end of the line to the outside sprayed. For this purpose, the line can simply be open at the lower end. However has it also has advantages to close the conduit at the lower end and spread it around the perimeter Provide openings or a ring opening from which the brewing water is sprayed. One Closure cap can be tapered with a point downwards be designed around the same when attaching the centrifugal filter in the middle part to push stored ground coffee to the side. The middle part of the The bottom of the centrifugal filter tapers conically upwards and preferably be designed with a round dome or a point in this case the shaft can also have a simple flat cover that holds the coffee grounds only pushes down, that then pushed to the side in the filter on its bottom cone The water heater can have a steam collecting space, from which a steam line emits9 which preferably ends at one point when the drip tray is attached with the interior of which is connected9 which is then preheated by the steam and thus draws less heat from the coffee. It is also conceivable to use the steam e.g. through the hot water pipe into the interior of the centrifugal filter could, however, have the disadvantage that (1 the ground coffee is too much moistened and is less well distributed at the beginning of centrifugation On the other hand, this can cause the The advantage9 is that the ground coffee is moistened and is maintained until the start of the brewing process can unlock what the aroma of the coffee prepared or the utilization of the Ground coffee can benefit.

A water tank9 can serve as a water heater, the bottom of which is a Has heating, which at the same time has a warm-up space arranged underneath for coffee cups heated This again benefits the temperature of the coffee. The above overall Coffee machine described has in its basic structure still the essential Advantage that they look and handle the usual espresso machines is very similar, which goes very well with the fact that with a centrifugal filter The type described a filter espresso coffee can be prepared user The machine understands what is really important without much instruction the safety of use benefits. Awll3erdel - gives the machine to the uninitiated Users already know from their appearance that it is an espresso machine and he should process espresso coffee in this. The lead times of the brewing water are in the range of the usual espresso machines with these coffee machines, so that the coffee prepared and provided for this purpose is also expediently used wil and not normal coffee, which is intended for much longer brewing times, like him e.g. in bag filters using the hand infusion process or in a corresponding coffee machine is used.

The centrifugal filter is preferably concentric with the efotor shaft arranged and in particular can be coupled directly to this, creating a simple, robust Construction is achieved.

To support the assembly, which is elastically supported in the housing, can elastic ones arranged in the height area between the centrifugal filter and the motor Serving storage elements. With eccentric storage of the ground coffee in the coffee filter and imbalances caused by this can cause the assembly of centrifugal filter and motor swing around the suspension plane in between, whereby the centrifugal filter and the motor each perform opposite movements and the drive motor with due to its relatively large mass, radial deflections of the centrifugal filter that are too large prevented.

According to a particularly preferred embodiment, for which an independent Protection is claimed, have the drive shaft and / or the centrifugal filter a height-adjustable coupling device. The centrifugal filter can be used in In this case, easily attached to the device unhindered by the coupling device and does not have to be cumbersome on one Coupling pushed on For example, the drive shaft can be adjusted in height together with the drive motor be stored in the device housing, whereby the drive motor and the drive shaft Existing assembly is simple, but a lifting mechanism is provided for it have to be. Alternatively, a coupling sleeve on the drive shaft or in the Drive shaft a coupling pin to be guided vertically for height adjustment A lifting device with a pivotable about a horizontal axis is preferably used Hand lever, which has the great advantage that on the one hand large actuating forces on simple Way to be applied and on the other hand the device is the archetype of espresso machines is similar to the lever operated reciprocating piston9 which is an advantage since the On the one hand, the lever signals9 to the user that it is an espresso machine that an espresso coffee should also be used9 and on the other hand the lever in the simplest way signals correct operation in particular when all the rest of the filters are inserted except for the filter filled with ground coffee Operating processes of the device can be effected or triggered by means of this lever Alternatively, however, a lifting device with an electric one can also be used for height adjustment Serve drive9 which comes into action by actuating an electrical switch.

The drip tray surrounding the filter can slide in a drawer-like manner be inserted and sealing against a housing surface by means of a clamping device 9 whereby the tensioning device is preferably pulled directly with the lifting device the coupling device cooperates.

For example, both can be operated by the same hand lever.

The lifting device and / or the clamping device can have an on / off switch operate for the drive motor, which is arranged so that it is in the end of the Clutch stroke is actuated. This automatically ensures that the engine is only switched on when the coupling process between the centrifugal filter and the drive shaft is complete. The on-off switch can control the drive motor set in motion via a timer, e.g. when using a flow heater and at the same time switching it on by means of this on / off switch for the heating the water heater for a heating-up time. give before the promotion begins.

However, the time delay is chosen so that the centrifugal filter is set in rotation before the water pumping begins, so that the dry Ground coffee is well distributed and compacted in the centrifugal filter before brewing water is fed.

A flow heater can serve as the water heater, preferably in a thermally conductive connection with a storage area designed as a hotplate stands for the coffee cups. The water heater can by means of the lifting device operated on-off switch are supplied with power. The water heater has the advantage that you do not have to heat up the entire water supply before the brewing process can begin. The filtering and the heating of the water take place at the same time. The heating power of the water heater and thus its water throughput is on the brewing time required for espresso preparation. Another advantage is that by means of a water heater before the start of the water pumping in the type described in the German Offenlegungsschrift 28 11 497 generated steam by means of which the entire water-carrying system including the filter and the drip tray surrounding it and the cups are preheated.

The water heater is preferably designed so that it the Scalding water promotes gush by gush, with each gush the centrifugal filter so far fills that the coffee grounds are completely flooded with water and in a water ring is recorded, causing imbalances due to possibly uneven storage of the coffee grounds Such a water heater can be avoided from one up to inlet and The closed chamber drain consists of 9 water from a tank located at a higher level flows in via a line with a check valve. As soon as a sufficient Steam pressure is reached, the water is raised via a riser or through a Type of pressure relief valve delivered to the centrifugal filter.

The volume of the heating chamber and the centrifugal filter are coordinated (cf. DE-OS 20 23 590).

The collecting tray surrounding the centrifugal filter can be in the same Spouts distributed around their circumference and the cups can be in one Circle be arranged symmetrically about the axis of rotation of the centrifugal filter below. This arrangement is particularly suitable for heating the cups by means of a substantially horseshoe-shaped water heater of conventional design9 in the one Tubular heater is connected to a water flow pipe.

The centrifugal filter can be adjusted in height relative to the drive shaft be arranged9 whereby it is of particular advantage if the footprint for the cups is moved at the same time to a small distance between the The upper edge of the cup and the lower ends of the spouts to prevent contamination the environment by splashing.

In the following, exemplary embodiments of the ePe of the invention are based on Schematic drawings explained in more detail. It shows: Fig. 1 in a vertical section essentially along the axis of rotation of the drive shaft a coffee machine with centrifugal filter; Fig. 2 is a fragmentary section substantially along the line II-II in Fig. 1; Fig. 3 in a section accordingly that of Figure i a modified embodiment; 4 in a corresponding section that of Figure 1, a further modified embodiment; Fig. 5 in detail in a section corresponding to that of FIG. 1, a further modification; Fig. 6 in a section corresponding to that of FIG. 4 shows a modification of the embodiment according to Fig. 4; 7 shows a detail of a section essentially along the line VII-VII in Figure 6; 8 shows a detail of a section essentially along it the line VIII-VIII in Fig. 6; 9 shows a further modified, a water heater and an embodiment having a height-adjustable coupling in a vertical one Section corresponding to that of FIG. 1; 10 is a section essentially along the line X-X in FIG. 9 and FIG. 11 shows a frontal view of the embodiment according to FIGS. 9 and 10, seen from the right in FIG.

The electric coffee maker shown in Figs. 1 and 2 has a generally C-shaped housing 2 with an L-shaped one Base part 4 and a motor housing 6 arranged thereon, the top side of a non-operational detachable cover 8 is closed. The base housing 4 with his as a standing surface serving wider lower part is in the lower horizontal arm flat drip tray 10 which is closed at the top by a cover plate 12 is, which has a series of through openings 14 and as a floor space for two coffee cups 16 standing one behind the other in the illustration, one of which only the rear can be seen. In addition to the drip tray, the base housing has a towering column 18 which carries the motor housing 6, this over the drip tray cantilevered and seen from above has the same projection as the lower part of the base housing 4. The protruding part of the motor housing 6 has downwards towards an opening 20 in which a substantially horizontally extending extension plate 22 is arranged made of metal, the opening 20 except for a gap surrounding it 24, which allows the parts to vibrate relative to one another, closes. The approach plate 22 has three button holders 26 in the elastic rubber rods on its upper side 2S are buttoned, they protrude vertically upwards from the button holder 26 and with its upper end in one all of the inside of the motor housing (> trained Button holder 30 are each buttoned. The attachment plate 22 is thus elastic Suspended in the motor housing uutl additional protection against twisting about a vertical Axis secured in that 6 lugs 32 protrude inward in the motor housing and with recesses 34, the lower free end portions of the rubber rods 28 with play enclose. From a certain rotation of the attachment plate 22, the rubber buffers come 2 in contact with the cattle of the recess 34 and prevent further rotation. According to a modified embodiment, corresponding inner approaches can also cooperate with the button holder 26 formed on the attachment plate, whereby the rotations are absorbed less gently, but the construction as a whole becomes more robust.

The attachment plate 22 has edge regions 36 which are angled downwards with screw path sections 38 projecting inwardly from the lower end thereof, which form part of a so-called bayonet lock. On the underside of the extension plate 22 is a collecting tray 40 attached, which is open at the top and at its upper Edge has a cooperating with the extension plate 22 ring seal 42 and radially outwardly projecting screw path sections 44, which with the screw path sections 38 of the attachment plate 22 cooperate. The drip tray 40 has a horizontal Direction cut a circular cross-sectional shape and has a lateral essentially vertical collecting wall 46, which is slightly radial Distance to a arranged in the collecting tray 40 centrifugal filter 48 extends. A bottom 50 of the metal drip tray 40 rises slightly towards the center and has a central one extending upward from the center of its top Bearing pin 52, which is rounded hemispherically at its uppermost end. Through the Inclination of the bottom 50 is a gutter 54 for the outer area formed by the collecting wall 46 downwardly flowing coffee, of which two are Radially extending recesses over the bearing mandrel 52 opposite points or in the bottom 50 formed grooves 56 with sloping towards the bearing mandrel 52 Bottoms 58 are formed, which in each case one on the bottom 50 of the drip tray 40 formed, vertically downwardly extending outlet 60 open. With horizontal Arrangement of the channel 54 of the drip tray 40 must be symmetrical because of this Arrangement of the spouts and due to the fact that the coffee around the circumference is even is sprayed, the draining coffee is evenly on the two spouts 60 and thus distribute the two cups 16. The drip tray 40 also has another large, radially wegerstrekkenden from the lower region of the catch wall 46 Handle 62 of the type commonly known on espresso machines.

The centrifugal filter has a modification in the middle Area of its lid the same shape as in the German patent application DE-OS 30 29 546. The recess on the bottom, which is there for coupling to the Motor shaft is used, is in the present case to accommodate a bearing insert 64 made of a plastic with good sliding properties, which has a central, has downwardly directed bearing recess h6 into which the bearing pin 52 of the collecting tray 42 engages, with its hemispherical upper end on the upper floor the recess 66 rests and thus the centrifugal filter 48 in a certain Height in the drip tray 40 holds. The bearing lug 64 is in a bottom recess a cup-shaped lower part 68 of the centrifugal filter 48 is arranged. on This, the coffee grounds 70 receiving lower part 68 is operationally releasable Cover 72 attached, which has a central water supply opening 74, with a these surrounding, a piece protruding upward pipe socket 76. From the lower part of the Pipe extension 76 support ribs 78 extend radially inward, in cross section seen like propellers or turbine blades and so with their revolving direction front edge are employed against a horizontal plane according to obeii that they when This comes together with brewing water falling through the water supply opening 74 promote downwards. The support ribs 78 are at their inner end with a lower one Coupling part 80 connected, the central recess 82 in the upper part Has coupling teeth not shown in detail and its outer peripheral wall tapers conically towards the bottom and one into the interior of the centrifugal filter 48 has protruding tip 84.

The tip 84 ends just above a central area of the lower part 68 raised spray table 86 formed above bearing insert 64.

On the oil, crscitc of the attachment plate 22 is one of the water supply opening 74 of the centrifugal filter 48, a water chamber 88 is formed, the a lower end portion of a vertical motor shaft serving as a drive shaft 90 of an electric motor 91 surrounds the entire circumference and a top wall 92 with a has ring seal 94 cooperating with the motor shaft 90 that is passed through. On the bottom side, the water chamber 88 has a short opening into the water supply opening 74 or

the pipe extension 76 surrounding this a piece protruding into the funnel 96, the lower opening of which surrounds the coupling part 80 at a relatively small distance and the brewing water that flows downwards onto the conical outer circumference of the Coupling part 80 steers. In this way, the brewing water is along the coupling part 80 fed centrally to the spray table 86 in the filter.

The electric motor 91 is on supports protruding from the attachment plate 22 98 fixed and the motor shaft 90 has at its lowermost end portion a Coupling teeth 100, which coincide with the coupling teeth of the coupling part 80 of the centrifugal filter 48 is in releasable engagement by vertical pulling. The motor shaft forms the drive shaft here.

In addition to the water chamber 88 and the motor 9i, there is a water heater 102 arranged in the motor housing 6 above the protruding acid 18 of the base housing 4. The water heater 102 made of metal as a cast part has the shape of a open-topped water tank with an upper peripheral edge section in the Cover 8 of the motor housing 6 is suspended and fastened. Up is the water heater by a fairly tight-fitting clamped lid 104 with a Handle 107 locked. A bottom 106 of the water heater has one on its Heating element 108 arranged on the underside and also supports the heating element 108 shielding plate 110 with openings 112 which shields against contact from below the heat can be radiated downwards into one in the upstanding part 18 of the Base housing trained Warm-up chamber 114, which is used for receiving of preheated coffee cups 116 is designed including the towering one Part of the base housing 4 is a second chamber 118, which can optionally be used for storage from further coffee cups or as a storage compartment for a section that is not required the power cord, not shown, of the device can be used.

The water heater 102 has an outlet in its bottom area 120, in which a shut-off valve 122 is arranged, which is electromagnetically controlled by a The coil 124 surrounding the outlet 120 is actuated. On the connection piece i20 is an elastic hose 126 connected to part of the hot water line forms and at its other end to a lower lateral connection piece 128 the water chamber 88 is connected. Mtch the water chamber AS forms a section the hot water line The water heater 102 is located just below the upper edge a second connection port 130, through which steam is connected via a elastic line 132 is fed to an upper connection piece 134 of the water chamber 88 will.

The coffee maker described above works as follows. In preparation for use, a water supply is required with the cover 104 removed poured into the water heater 1O2, the lid 104 put back on and the electrical Resistance heating 108 switched on by means of a switch, not shown. Then by rotating the drip tray by means of its handle 62 around the The axis of rotation of the centrifugal filter detached the collecting tray from the rest of the device and removed downwards and then to the side, the coupling part 80 of the centrifugal filter 48 is from the coupling teeth 100 of the motor shaft 90 and the centrifugal filter 48 is stuck in the collecting shell 40 on the bearing pin 52.

The centrifugal filter 48 then added is operated by hand at its upper pipe socket 7 (> captured, lifted out of the drip tray 40 and opened by rotating the cover 72 relative to the lower shell 68. Possibly existing old ground coffee is removed and a dosed amount of new ground coffee is added. Then the lid 72 is put back on and locked, and so is the centrifugal filter 45 placed in the drip tray 40 on the bearing mandrel 52 and the drip tray 40 then again attached from below to the extension plate 22 of the rest of the device and through Rotation and interaction of the screw path sections 38 and 40 locked on this. When starting, the coupling teeth of the motor shaft 90 and the coupling part have each other 80 reconnected to each other. As soon as the drip tray 40 is locked reached its locking position by turning, it actuates a not shown, on the extension plate 22 arranged switch that controls the circuit of the electric motor 91 closes and starts it. At the beginning of centrifugation, the still dry ground coffee in the centrifugal filter 48 thrown outwards and closed distributed in an even ring. Steam formed in the water heater flows during this time through the line 132 into the water chamber 88 and warms it up. Of the Steam also flows down through funnel 96 into drip pan 40 and we d directed through their outlets 60 down into the coffee cups 16, which also the drip tray 40 and the cups 16 are preheated. When the Electric motor, a timer is set in motion, which with a predetermined Time delay the shut-off valve 122 in the outlet 120 of the water heater 102 opens and thus hot water through the hose 126, the water chamber 88, the funnel 96, the water supply port 74 of the centrifugal filter 48 to the interior of the latter lets flow where it meets the spray table 86 and from this to the ground coffee ring 70 is thrown off. The brewing water penetrates the coffee grounds layer 70 and is on the outer circumference of the centrifugal filter 48 as coffee on the collecting wall 46 thrown off the drip tray 40 and flows to this below into the channel 54 and in this to the discharge channels leading radially inwardly downward 56 to the outlets 60 and through these down into the coffee cups 16. Am not Time switch shown was by means of a selector switch, not shown set beforehand whether one or two cups of coffee are to be prepared so that the shut-off valve 122 is kept open for an appropriate time9 which is especially important when if there is a water supply in the water heater for several consecutive brewing processes was entered.

After the brewing water flow has ended or the coffee has been spun off the drip tray 40 can be removed or just twisted a little, to operate the switch, not shown, and the electric motor 91 again to put still.

According to a modified preferred embodiment of the the drip tray 40 operated switches, not shown, in the circuit of the electric motor 91 also just a security function and if not or not correctly keep the circuit open. A connected in series with it, to be operated by the operator switch is operated as soon as one with a temperature sensor or controller, not shown, at the bottom of the water heater The associated indicator light shows that the brewing water has reached the required temperature has reached. The user then also has it in hand after attaching the collecting tray 40 to wait a while with the centrifugal filter 48 until the through the line 132 flowing steam, the drip tray 40 and also the cups 16 are preheated to a greater extent Has. Since the ground coffee 70 may be moistened in this case, it can be useful be sure to switch the engine on for a very short moment beforehand. If the user by means of the switch, not shown, finally the electric motor 9i for the Switches on the brewing process, he can then with a second, not shown Switch the shut-off valve 122 electromagnetically Open and this Keep it open until the required amount of coffee has been made. Then he leaves the switch designed as a pushbutton switch for actuating the shut-off valve 122 go and then, as soon as the last coffee has run through the outlets 60, the engine switch to the off position.

The modified embodiment shown in Fig. 3 is from the outside Structure very similar to that according to Fig. 1 with an overall C-shaped housing, consisting of a base housing 304 with a drip tray 310 on which a cover plate 12 is identical to that of FIG. 1, whereupon the cups 16 are. A towering one Column 318 has a lower, rearwardly open receiving space 418 for coffee cups or an unneeded section of a power cord, not shown. Into a space 314 arranged above it, which is only open towards the motor housing 306 protrudes the lower end of an electric motor 391. The motor housing 306 is through a Cover 308 closed, the one in principle as in the embodiment according to Fig. 1 constructed water heater 402 with a bottom heater 408 and a Drain connection 420 with a shut-off valve 422 carries. One of the motor housing 306 according to at the bottom essentially closing attachment plate 322 has an over the Space 314 in the column 318 of the base housing 304 in a straight extension horizontally protruding extension 398 to which the electric motor 391 is attached, through an opening of approach 398 protrudes. The attachment plate 322 is parallel to the by means of three Axis of rotation of the centrifugal filter extending rubber rods 328 in the motor housing 306 suspended elastically, with two elastic rubber rods 328 in the area of the electric motor 391 are arranged, of which only one can be seen and the third in the farthest from it The area on the far right in FIG. 3 is arranged. In the opposite of the embodiment According to FIG. 1, unchanged collecting tray 40, a centrifugal filter 348 is arranged, which differs from the embodiment according to FIG. 1 only by a lower one Coupling part 580 differs, whereby the centrifugal filter with the drip tray 40 must be set less deep and therefore less easy with already attached Coffee cups 16 collided.

A drive shaft 390 formed on the attachment plate 322 surrounding water chamber 388 has only one connection piece +28 for one Hose 426 coming from the water heater 402. On the top of the extension plate 322 an upwardly projecting bearing block 399 is formed, which is a short above the Water chamber 3S8 arranged slide bearing 450 and one in the upper area of the motor housing 306 arranged slide bearing 452 for supporting the drive shaft 390 carries the its lower end a cooperating with the coupling part 380 of the centrifugal filter 348 Having clutch teeth 400.

Just above the lower bearing 450 is a pulley 454 on top Drive shaft 390 attached via a drive belt 456 with a pulley 458 on the upper end of a motor shaft protruding upwards from the motor 460 is in drive connection. At the top of the drive shaft 390 is a flywheel 462, which acts as a counterweight to the centrifugal filter and in the case of Imbalances due to uneven storage of the coffee grounds have a stabilizing effect and prevents vibrations from building up too much. The function of this coffee maker 7 is the same as that of the embodiment according to FIGS. i and 2, wherein only steam preheating is not required. To compensate for this is on the top the extension plate 322 a sparse electrical heater 464 formed, the same Circuit is like the heater 408 of the water heater 402 and the extension plate 722 and the water chamber 388 during the heating time of the water heater 402 as well heats up and also preheats the interior of the drip tray 40 as soon as it is attached is.

The modified embodiment shown in Fig. 4 is special suitable as a device that can be mounted on a wall, but can also be used free-standing will. The housing 2 in the middle C-shaped here is also in the drawing with the opening oriented to the front of the viewer and a base housing 504 with a large Drip tray 5-l (), which has the same footprint as the one above Motor housing 506 is protruding, essentially narrow plate-shaped Column part 51S is connected to the motor housing and extends into the latter and can be moved and locked in it in the vertical direction. The top one The area of the motor housing 506 is mutually exclusive except for a vibration of the parts permissible distance almost entirely taken up by a flat water heater 602, which has a bottom electrical heater 608 and one coaxial to the axis of rotation a centrifugal filter 548 downwardly leading drain port 620, in which a Absperflrentil 622 is arranged. The upper edge of the designed as an open shell Water heater 602 has one outwardly and one inwardly in the extreme end portion flange 603 protruding below, which has an inwardly cranked uppermost end section 507 of the motor housing 506 reaches down a little.

At the top, the water heater 602 is removable by a thin Cover 604 closed from a highly thermally conductive sheet metal and can be used as a heated Serving surface or hot plate for coffee cups 605 and one the floor space Have a frame-like surrounding raised edge portion 607 on the edge flange 605 of the water heater 602 is seated. A bottom wall 521 of the motor housing 506 has a circular through opening 520. Extending over the bottom 521 and the opening 520 essentially the entire floor plan of the base housing except for a narrow one Extended extension plate 522 filling the edge area, from the underside of which a ring extension 576 with fastening elements for attaching a drip tray 540 downwards protrudes into the bottom opening 520. The attachment plate 522 is elastic by means of rod-shaped Buffer elements 528 resiliently suspended in the motor housing 506 and has a towering support arm 670 on which an electric motor 591 and above the water heater 602 is attached. The electric motor 591 has a downward shaft 660 protruding from it, which is parallel to the axis of rotation of the centrifugal filter , 48 extends and carries a pulley 458.

Immediately above the centrifugal filter 548 is on top of the Extension plate 522 has a bearing eye 649 in which a sliding bearing 650 is arranged is, the one designed as a hollow shaft, along the axis of rotation of the centrifugal filter 548 extending drive shaft 590 cooperates.

Furthermore, on the top of the attachment plate 522 there is an upstanding bearing block 599, the first one between the lower bearing 650 and the water heater 602 arranged upper bearing 652 for the drive shaft 590 and second in its uppermost end section serves as a second attachment for the water heater 602. A belt pulley is located on the drive shaft 590 between the two bearings 650 and 652 654 attached, which via a drive belt 656 from the pulley 458 on the Motor shaft 6t0 is driven. At the top end of the drive shaft A flywheel 662 is attached to 590 over the top of the drive shaft 590 extends and has a through hole 663 which is coaxial with the axis of rotation and the bore 593 of the drive shaft 590 extends and has a smaller diameter has an annular seal 664 than this and also has an annular seal 664 in a circumferential groove, the one with the outer circumference of the drainage connection protruding through the bore 663 620 of the water heater 602 cooperates.

The drip tray 540 corresponds completely to that of the embodiment according to 1 and 2 coincide, but is arranged here so that the one in FIG. 4 is not to be seen handle facing forward to the viewer so that the spouts in the plane of the drawing are next to each other and two cups 516 placed underneath both you can see. The centrifugal filter 548 rotatably mounted in the collecting tray 540 agrees with the filling rule according to the middle area of its lid the fig.

1 and 2 or Fig. 5 match. From the middle area of a filter cover 572, a pipe socket 576 protrudes upwards and has its inside in the upper end section a coupling toothing, which is connected to one on the outer circumference of the drive shaft 590 trained coupling teeth 600 cooperates. Below the coupling teeth 600, the drive shaft 590 extends with a reduced outer diameter further down into len filter interior and acts with one in the lower In the area of the inner wall of the extension 576, an annular seal arranged in an annular groove 594 together. The lower end of the drive shaft 590 is through a cap 580 bis closed on a narrow annular gap 581, the cap being conical with the The tip is designed downwards to allow ground coffee when the centrifugal filter is attached to be able to push aside. Modifications can be made to support this effect of the illustrated embodiment, on the bottom of the lower shell of the centrifugal filter soaring table-shaped part can be dispensed with and this by a cone-shaped towering part to be replaced, which still has enough space to accommodate the Has cooperating bearing with the bearing pin of the drip tray 590. The table-shaped In this case, the middle plate does not have the function of a spray plate, since the Drive shaft 590 takes over this function. From the top of the water heater 602 can be a steam line, as indicated by the broken lines 632, lead to the attachment plate 522, on which a simple downward opening for this case Connection piece is to be provided.

The coffee machine according to FIG. 4 works in the same way for the user Way like the coffee maker according to Figures t and 2. As soon as the shut-off valve 422 in the outlet connection of the water heater 602 is opened, the hot brewing water runs from this into the upper end of the hollow drive shaft 590 and falls in this for the most part simply downwards without touching the walls of the same. The annular gap 581 at the lower end of the drive shaft 590 is dimensioned so that a small backwater forms there, in which the water is then set in rotation until it is sprayed directly onto the ground coffee through the annular gap in the filter. Since it can happen that part of the brewing water emerging from the drainage connection 620 is deflected to the side and the inner wall of the drive shaft 590 in its upper Area touches, this has at its upper end by the flywheel 662 a Section of reduced diameter, which prevents under the action of centrifugal forces the water may be pushed out upwards.

The seal 664 thus only provides a safeguard in the event, e.g. a blockage of the water or coffee passages due to the flat formation the upstanding column 518 of the base housing 504 and the arrangement thereof in FIG a plane approximately parallel to one through the motor shaft 660 and the drive shaft 590 and the arrangement of the two outlets 560 in a parallel to it Level, the result is a very flat construction across the plane of the paper in the drawing measured, which is particularly suitable for mounting the device on the wall. By the slidable guide of the plate-shaped column 518 in the motor housing 506 can the drip tray 510 after the device is not in use or when it is being shipped be pushed up and with the drip tray 540 removed to the bottom of the motor housing 506 are pushed up.

If the water heater is of a correspondingly large design, the collecting tray 540 can be housed in this. So the device is extreme when not in use compact and protected against dust.

FIG. 5 shows a sectional view corresponding to that of FIG Fig. 4 shows a modified embodiment of the embodiment according to FIG Stop plate 722 has, surrounding a hollow drive shaft 790, one of its Top upwardly protruding approach 723 for holding one with the drive shaft,) () z cooperating ring seal 794. From the top the attachment plate 722 also protrudes a bearing block 799 upwards, which is in a small Distance above the sealing shoulder 725 a lower oil-lubricated bearing 750 carries. Between the bearing 750 and the sealing shoulder 723 of the attachment plate 722 carries the Shaft an oil-tight, e.g. by soldering, connected oil throwing disc 880 with an upper one extending horizontally and radially from the vertical shaft Washer 882, adorn the outer circumference, forms a cutting edge 884. From the bottom of the Disk 882 extends a small distance from the outer periphery or the Cut 884 an annular wall 886 to below the upper edge of the sealing attachment 722, surrounding it downwards, its lower end angled outwards and as a sciineide 888 is formed. Oil that emerges from the bearing 750 at a standstill is moved downwards derived from the sealing attachment 723 over onto the surface of the attachment plate and cannot get down into the inside of the drip tray. During rotation Escaping oil is thrown off the cutting edges 884 and 888 to the outside. Instead of For this construction it can be sufficient to have a simple plate-shaped slightly outwards to use the rising throwing disc during the standstill any leaking oil collects and during the next operation as well oil escaping during operation is thrown off.

In a modification of the embodiment according to FIG. 4, it is possible to use the Motor as in the embodiment of FIG. 1 instead of the flywheel 662 place, in which case the motor shaft can be a hollow shaft, but can alternatively with a non-hollow motor shaft, a hollow drive shaft coaxial with it be coupled by an upwardly and downwardly sealed water chamber is surrounded and has windows through which the water enters and how based of Fig. 4 described, can flow into the interior of the centrifugal filter. One Such an embodiment has the advantage that the Flywheel is omitted and the machine becomes lighter overall. On the other hand, a flywheel is E.g. made of cast iron, not an expensive component and it can have advantages, the weight of the Machine to increase, so this in particular for the attachment of the drip tray has a greater stability.

The higher weight - can also be beneficial to one due to vibrations to prevent the device from moving around on the stand. About the embodiment 3 it should also be mentioned that this is the advantage of a lower center of gravity due to the lower engine and the comparison to the embodiment According to Fig. Has a slightly deeper arrangement of the water bowl.

The embodiment according to FIGS. 6 to 8 largely agrees with the 4 and the same parts have been given the same reference numerals as there designated. The C-shaped housing 702 has a base housing 704 with a cover-side Drip tray 510, which has the same footprint as a motor housing arranged above it 706 and is about a towering, essentially narrow plate-shaped column part 718 connected to motor housing 706 and extends into the latter and is on a rear wall 802 of the same out. The uppermost area of the motor housing 706 is almost completely apart from a vibration between the parts Taken by a flat water heater 602 which has a bottom electric Heater 608 has and one coaxial to the axis of rotation of a centrifugal filter 748 downward drainage nozzle 620, in which a shut-off valve 622 is arranged is. The upper edge of the water heater 602, which is designed as an open shell, has an outwardly and downwardly projecting flange in the outermost end portion 603, which has an inwardly cranked uppermost end section 507 of the motor housing 706 reaches down a little.

At the top, the water heater 602 is removable by a thin Cover 604 closed from a sheet of metal that conducts heat well and can be used as any parking space, etc. Warming plate for coffee cups 605 are used and have a raised edge section 607 surrounding the storage area in a frame-like manner, which sits on the edge flange 603 of the water heater 602.

The motor housing 706 has moreover from the rear wall 802 to a left side wall 804 and a right side wall 806 as well as a protruding front this front connecting front wall 808 and a bottom wall 521 with a circular stanchion Through-opening 520. Above the base 521 a substantially extends filling the entire plan view of the motor housing 706 except for a narrow edge area extended attachment plate 722 from the underside of a ring attachment for guidance and Centering a removable drip tray 740 downwards into the bottom opening 520 protrudes. The attachment plate 722 is secured by means of rod-shaped elastic buffer elements 528 resiliently suspended in the motor housing 506 and has a protruding support arm 670, to which an electric motor 591 and above the water heater 602 is attached. The electric motor 591 has a shaft 660 protruding downward from it, which extending parallel to the axis of rotation of the centrifugal filter 748 and a pulley sps58 carries.

Immediately above the centrifugal filter 748 is on top of the Extension plate 722 has a bearing eye 649 in which a slide bearing 650 is arranged is, the one designed as a hollow shaft, along the axis of rotation of the centrifugal filter 748 extending drive shaft 790 cooperates. Further an upstanding bearing block 599 is formed on the top of the attachment plate 722, First, one disposed between the lower bearing 650 and the water heater 602 upper bearing 652 for the drive shaft 590 carries and second in its uppermost End section serves as a second attachment for the water heater 602. Between Both bearings 650 and 652 have a pulley 654 attached to the drive shaft 790, via a drive belt 656 from the pulley 58 on the motor shaft 660 is driven.

On the top end portion of the drive shaft 790 is a flywheel 662 which extends over the upper end of the drive shaft 790 and has a through bore 663 which is coaxial with the axis of rotation and the bore 593 of the drive shaft 790 and has a smaller diameter than this and further in a circumferential groove an annular seal 664, which with the Outer circumference of the drain connection 620 of the water heater, which protrudes through the bore 663 602 cooperates.

The drip tray 740 has a handle 814 protruding forward, that here as extending approximately parallel to the front wall 808 of the motor housing 702 Recessed grip is formed.

Two outlets 560 lie in one through the axes of the motor shaft 660 and the drive shaft 790 running level next to each other and merge into two Cups 516, which are on a grate 816 placed on the drip tray 510.

One arranged in the drip tray 740 for the sprayed coffee Centrifugal filter 748 largely agrees with that in the German Offenlegungsschrift 30 29 546 described centrifugal filter and has a bottom Bearing insert 818, by means of which it is placed on a central bottom area of the drip tray 740 upwardly protruding bearing pin 820 is rotatably mounted about a vertical axis. A pipe socket 776 protrudes upwards from the middle area of a filter cover 772 and has a coupling toothing in the upper end portion of its inside, with a coupling toothing formed on the outer circumference of the drive shaft 790 600 cooperates. The cover 762 also has a protruding into the filter interior Pipe socket 822, the bottom side by a flat conical cap on the outside downwards 780 is closed, with an annular gap between this and the pipe extension 822 781 remains for spraying the brewing water onto the ground coffee 824. the The conical cap 780 can push ground coffee to the side when the cover 722 is put on. The hollow drive shaft 790 terminates over the cap 780 below the seal 594 and releases the brewing water into the pipe socket 822 of the filter cover 772.

The drip tray also has a protruding edge from its upper edge radially outwardly extending and centering with the pipe extension 736 of the extension plate 722 cooperating edge flange 744, the lower side in a groove on the cover side the attachment plate 722 carries cooperating ring seal 642. Right and left the Catch pan 780 protrude from the column part 718 of the base housing 704, cantilever arms 826 and 828 through one passed through the motor shaft 660 and the drive shaft 790 Level forward and have in the pipe socket 736 of the attachment plate 722 upwards protruding support lugs 830, on which the edge flange 744 of the drip tray 740 rests.

The right side wall 806 has a below the water bowl 602 Through opening 832 through which a shaft 834 extends, which at its inner End rotatably with a gear 836 and at its outer end rotatably with a Hand lever 838 is connected to a handle 840. The hand lever 438 is in the Operating position shown in Fig. 6 for the sake of clarity - to the greatest extent Partly cut away but in its original position in broken lines drawn. The gear 836 works with one on the front of the column part 718 formed tooth bar 842 together, thus by pivoting the hand lever 838 the motor housing 706 and the base housing 704 together with the suspended thereon Drip tray 740 and the centrifugal filter 748 can be displaced relative to one another are.

The coffee machine according to FIGS. 6 to 8 works as follows: In the position of the hand lever 838 shown in broken lines the support lugs 830 of the cantilever arms 826 and 828 outside the lug 736 the attachment plate 722 and the drip tray 740 is after filling the centrifugal filter 740 with ground coffee and placed on the bearing pin 820 like a drawer between the Krägararm 826 ~ and pushed into their support lugs 830, with them on the handle 814 is held. Water is poured into the water heater 602 beforehand and its lead 608 switched on.

As soon as an indicator lamp, not shown, has a sufficient brewing temperature of the brewing water, the handle 840 of the hand lever 878 is moved downwards forwards pulled, whereby the column part 718 is drawn more into the motor housing 706 and the cantilever arms 826 and 828 formed thereon, the collecting tray 740 in the pipe socket 736 of the attachment plate 722 and lift into sealing contact with the latter. no with this movement The centrifugal filter 740 also moves with its pipe extension 776 to the lower end of the drive shaft 790, whereby a fluid-tight connection is established and the coupling teeth 600 with the coupling teeth of the cover of the centrifugal filter 740 comes into engagement. At the same time, a switching arm formed on the gear is actuated 846 an electrical switch 848 which immediately switches the electrical drive motor 591 switches on and afterwards via an interposed timer, not shown Distribution of the coffee grounds in the centrifugal filter, the shut-off valve 622 in the outlet 620 of the water heater 602 opens. As long as the hand lever 838 is in its lower position is held, the drive motor 591 runs and the shut-off valve 622 now remains opened and the brewing water flows through the hollow drive shaft 790 into the centrifugal filter 740

The coffee is sprayed off the outside of the centrifugal filter 748, in the Collecting tray 740 and collected through the two outlets 560 into the cups 516 submitted. The advantage of this embodiment is that the clutch stroke distance between the outlets 560 and the cups 516 not changed will. This distance can therefore be small, which means that coffee will spill out the outlets 560 is very small and the machine is less soiled. if the machine with the base housing 704 is on a support surface, moves the motor housing 706 downwards during the clutch stroke. When mounting the motor housing to the wall 706 becomes the base housing 704 together with the cups 516 and the drip tray 740 raised during clutch stroke.

As soon as you let go of the hand lever 838, this returns due to the spring preload a spring, not shown, in its starting position shown in broken lines back, whereby the centrifugal filter 748 is disengaged and the collecting tray 740 from the pipe extension 736 of the extension plate 722 'is moved out and by means of the Handle 814 can be pulled forward like a drawer.

In a modification of the embodiment shown in FIGS Instead of the cantilever arms 826 and 828, one of the can be used as a floor space for the Coffee cups 516 serving grate 816 towering pillar 860 step between the Spouts 560 engages and the Auffangsclsale is supported on the bottom. The mugs are arranged on both sides of this support column 860.

The embodiment according to FIGS. 9 to 11 has an overall C-shaped housing 902 with a flat base part 904, which is in a cover-side Opening of a metallic warming plate serving as a surface for cups 906 908 and is closed at the bottom by a bottom 910. The towering one Column part 912 contains a fresh water tank 914 and a through channel 9i6 for a 918 riser.

A cold water line leads from an outlet 920 of the fresh water container 914 922 to a water heater 924, which essentially consists of one at the bottom he hot plate 908 adjacent tubular heating element 926 and one water pipe 928 connected to its underside and guided along it.

The brewing water of the riser pipe 918 is supplied by the flow heater 924 fed.

A head part 930 of the protrudes from the upper section of the column part 912 Housing 902 over the base housing 904 with the hotplate 908 in front, the bottom side is closed by a flat attachment plate 932. One of the extension plate 932 upwardly protruding guide part 934 forms a vertical sliding guide for an electric drive motor 936 with a downward protruding therefrom Drive shaft 938, the lower end of which has coupling teeth 940. One The compression spring 942 arranged in the guide part 934 re-tensions the drive motor 936 above before. Furthermore, a bearing block 944 protrudes upward from the extension plate 932, in which a horizontal shaft 946 is journalled through the right side wall of the head housing 930 protrudes outwards and outside the same with an obliquely protruding forward Hand lever 948 is rotatably connected, which has a handle at its front upper end 950 carries. With the shaft 946 is also angled inside the head housing 930 forwardly protruding control lever 952 rotatably connected to its front End has a longitudinal slot 954 into which a fixed to the drive motor 936 and to the side of this horizontally extending actuating pin 958 engages. The actuating pin 958 extends through a vertically extending slot Slot 956 in the guide part 934 for the drive motor 936. The free end of the control arm 952 interacts with an electrical switch 960 in its lowest position.

Further, with the shaft 946 are adjacent to the side walls of the head housing 930 cams non-rotatably connected with C-shaped spine rails 964 cooperate on their upper free legs 966. The slide rails protrude through cutouts of the extension plate 932 down from the Head housing elvO and, with their lower free legs, form the slide-in rails in a collecting tray 970 with an upper edge flange 972 can be suspended. the In its front area, the drip tray 970 has one as an extension of the edge flange 972 designed handle 974, on which it grips like a drawer and between the slide rails 964 can be inserted. On the edge flange 972 there is an annular shape Seal 976 arranged.

The drip tray 970 has a slight distance from the edge flange 972 conical downward tapering side wall resp.

Collecting wall 978 with circular cross-sections, the bottom side is closed by a slightly conical inwardly rising floor 980, which has a §tågeraorn 982 in its middle area. From the outer edge area of the bottom are equally spaced from each other around the area around the catch tray Distributed tubular outlets 984 formed, which at a small distance over the Cups 906 arranged underneath end. Due to the slightly conical shape of the bottom 980 a channel is formed at its junction with the collecting wall 978, in which the coffee flowing down on the collecting wall collects and due to the symmetrical arrangement of the spouts is evenly distributed over them to to fill the cups evenly. This type of arrangement of the outlets 984 on the The drip tray 978 also has the advantage that the total number of spouts are short and thus firstly cool the coffee little and secondly are easy to clean are.

A centrifugal filter 986 can be removed from the collecting pan 970 arranged, the principle structure of the centrifugal filter according to the German Patent application P 32 31 038.2 corresponds. The lower shell 988 of the centrifugal filter has a bottom bearing 990 with which it is placed on the bearing pin 982 of the drip tray 970 for cleaning is detachably attached after each brewing process The lower shell 988 has a stepped design, firstly in the case of small amounts of ground coffee to achieve a sufficient layer thickness that cannot be achieved with larger quantities of ground coffee the more it increases significantly and the ground coffee is better at the initial spin to be distributed by having to find major paths and obstacles. A filter cover closes the cup 988 leaving a filter gap through which the coffee is sprayed. The closure and the filter gap can as in the German Offenlegungsschrift 70 29 546 described, be formed. The cover 992 has in its middle Area a formed on it, its horizontal surface penetrating pipe attachment 994, from whose inner wall propeller-shaped ribs 996 lead inwards and carry a clutch hub 998 with clutch teeth. From the riser 918 moves in the head housing 930 over the extension plate 952 a universal pipe 999 and is at its free end immediately adjacent to the drive shaft 938 downwards bent and penetrates the attachment plate 932 to just below its underside to end above the pipe socket 994 of the filter cover 992.

The coffee machine according to FIGS. 9 to 11 functions as follows: At the beginning, the user pours water into the fresh water container 914, which by a cover 915 is accessible.

In the illustrated rest position of the hand lever 948, in which this is urged by the spring 942 under the drive motor 936, the slide rails 964 in its lower position and the drip tray 970 can be like a drawer grasped by its handle 974 and withdrawn from the device. The centrifugal filter 986 is pulled off the bearing pin 982 and its cover is removed and ground coffee entered into the deepest portion of the lower shell 988. After that the lid 992 put back on and the centrifugal filter 986 on the bearing pin 982 on the floor 980 of the drip tray 970 and put them back between the Slide rails 964 pushed in. On the hot plate 904 are under the spouts 984 four cups 906 placed. The coffee machine is now ready for use. Want to prepare the espresso coffee, grasp the hand lever 948 on the handle 950 and pushes this in the direction of arrow 949 downwards, whereby on the one hand the Cam 965 are rotated and pull the slide rails 964 upwards, whereby the drip tray 970 suspended from it with its seal 976 against the attachment plate 932 is pressed. On the other hand, the control lever 952 is pivoted and takes over the pins 958 follow the drive motor 936 together with the drive shaft 938 below against the pressure of the pretensioning spring 942. This engages the coupling teeth 940 of the drive shaft 938 into the coupling teeth of the coupling hub 998 in the cover 992 of the centrifugal filter 986.

In the last section of the stroke comes the free end of the control lever 952 in contact with the actuating nipple of the electrical switch 960, which is directly the tubular heating element 926 of the flow heater 924 is switched on and via a timer sets the drive motor 936 in motion with a time delay. It is the running time of the timing element, not shown, dimensioned so that the drive motor 936 is switched on before the water pumping begins and the overflow pipe 999 This distributes and compresses the ground coffee in the filter while it is still dry. The flow heater is designed by dimensioning the cold water supply pipe 922 of the heating pipe 928 and the riser 918, especially in their diameter, designed so that he transports the brewing water in gushes. this will make the centrifugal filter each largely filled with water, causing high imbalances due to uneven storage of the coffee grounds are softened and the utilization of the coffee grounds is improved. A non-return valve (not shown) can be installed in the cold water supply line 922 be arranged or a throttle point. As soon as there is a sufficient amount of coffee is in the cups 906, you give the Hand lever 948 slowly free, whereby he is under the force of the bias spring 962 against the direction of the Arrow 949 moved back into its starting position shown, with the first Switch 960 is actuated and the water heater 924 and the drive motor 936 turns off and then the drive shaft disengages from the centrifugal filter and is pulled back into the head housing 930 and the slide rails 964 are lowered and loosen the clamping of the drip tray 970.

In a further development of the embodiment shown, in the cold water supply line 922 a valve device can be arranged, as described in the German Offenlegungsschrift 28 11 497 is described. With this valve device, the water can flow through shut off or throttle so that before starting normal water pumping a Steam generation phase is reserved and steam through overflow 999 into the Drip tray 970 and the centrifugal filter 986 and through the outlets 984 into the Cups 906 is conveyed and all of them come into contact with brewing water or coffee incoming system as well as preheating the cups. Even if the water supply is completely shut off the flow heater 924 is preheated by heating the hotplate 908 and thus the cups 906 and by warm air rising from the hotplate causes the drip tray 970 from the outside.

Claims (36)

A n p r e c h e 1. Electric coffee maker with a centrifugal filter, which is operatively releasably coupled to an approximately vertical drive shaft and the brewing water can be fed from a water heater, d a d u r c-h g e -k e n It should be noted that the centrifugal filter (48; 348; 548; 748; 986) with the lower End of the drive shaft (90; 390; 590; 790; 938) and one of the water heater (102; 402; 602; 924) outgoing hot water line (126, 128, 88; 426, 328, 388; 620; 590; 790; 918, 999) can be connected. 2. Coffee machine according to claim 1, characterized in that the lice water pipe (126, 88; 426, 388; 620, 90; 790; 999) to the centrifugal filter (48; 348; 548) supplies the brewing water from above. 3. Coffee machine according to claim 1 or 2, characterized in that that the centrifugal filter (48; 348; 548) rotatably in a collecting tray (40; 540; 740; 970) is arranged for the coffee sprayed by him, the operational detachable from a non-rotating component (attachment plate 22; 322; 522; 722; 932) the coffee machine can be fastened. 4. Coffee machine according to claim 3, characterized in that the Drip tray on an elastic in a housing (motor housing 6; 306; 506g 706) of the coffee machine mounted assembly (Attachment plate 22; 322; 522; 722) can be attached. 5. Coffee machine according to claim 3 or 4, characterized that the Auffanschale (40; 540) a [s IIandhabe for removing from the device or attaching and coupling the centrifugal filter (48; 348; 548) is formed. 6. Coffee machine according to one of the claims 3 to 5, thereby kernizeichnet, that the collecting tray (40; 540) preferably has a pivot bearing (bearing pin) at its bottom (50) 52) for mounting the centrifugal filter (48; 348; 548). 7. Coffee machine according to one of claims 3 to 6, characterized in that that the drip tray (40; 540) is attached to the rest of the coffee machine in the state holds the centrifugal filter (48; 348; 548) in a position in which Coupling elements with coupling elements (100; 400; 600) of the drive shaft (90; 390; 590) are in miniature intervention. 8. Coffee machine according to one of claims 3 to 7, characterized in that that the collecting tray (40; 540) is preferably radial to the axis of rotation of the centrifugal filter has transversely protruding handle (62). 9. Coffee machine according to one of claims 3 to 8, characterized in that that the collecting tray (40; 540) by means of a bayonet lock (38, 44) on the rest of the coffee machine (attachment plate 22; 322; 522) is attached and by rotation is releasable about the axis of rotation of the centrifugal filter. 10. Coffee machine according to one of Asnprüche 3 to 9, characterized by a switch located in the circuit of the drive motor (91; 59i; 591), which is actuated by the collecting tray (40; 540) when it is loosened or fastened. 11. Coffee machine according to one of claims 7 to 10, characterized in that that the drip tray (40; 540) preferably opens out directly into coffee cups Has outlet (60; 560) for the coffee. 12. Coffee machine according to one of claims 1 to 11, characterized in that that the hot water line (122, 126, 88; 490, 426, 588; 620, 590) has a shut-off valve (122; 422; 622). 13. Coffee machine according to claim 12, characterized by an actuating device for the shut-off valve (122; 422; 622), which this with a time delay after when the drive motor (19; 91; s9i) is switched on. 14. Coffee machine according to one of claims 1 to 13, characterized in that et that the drive shaft (390; 590) laterally offset from a driving them Motor shaft (460; 660) is arranged and has a flywheel (462; 662). 15. Coffee machine according to claim 14, characterized in that the Flywheel (462; 562) arranged in the upper end region of the drive shaft (390; 590) is. 16. Coffee machine according to one of claims 1 to 15, characterized in that that the centrifugal filter (48; 348) has a lid (72) with a central water supply opening (74), as well as a coupling element (0; 380) and arranged centrally therein this with the rest of the cover through propeller-like adjusted, into the centrifugal filter supporting ribs (78) conveying inwards. 17. Coffee machine according to claim 16, characterized in that the Hot water line (126, 88; 426; 388) at a lower end portion of the drive shaft (90; 390) preferably completely surrounding, against the water supply opening (74) of Centrifugal filter (48; 348) has open water chamber (88; 388). 18. Coffee machine according to one of claims i to 15, characterized in that that the drive shaft (590) is hollow and part of the hot water line (620, 590) forms. 19. Coffee machine according to claim 18, characterized in that the Drive shaft t90) protrudes into the centrifugal filter (548) and in this around the Has spray openings distributed around the circumference or an annular gap (581). 20. Coffee machine according to claim 18 or 19, characterized in that that the drive shaft (590) or a tubular extension (822) of the centrifugal filter that receives it (748) at the lower end of a cap (580; 780) which tapers downwards is locked. 21. Coffee machine according to one of claims 18 to 20, characterized in that that the drive shaft is closed by seals downwards and upwards The water chamber is preferably completely surrounded and has a window or an annular gap, through which the brewing water fed into the water chamber into the interior of the drive shaft can flow. 22. Coffee machine according to one of claims 1 to 21, characterized by a water heater (102; 602) with a steam collecting space, from which a steam line (132; 632) goes out into the drip tray (540) or into the hot water pipe (126, 88) opens. 23. Coffee machine according to one of claims i to 22, characterized in that that a water tank (102) is used as a water heater, the bottom (106) of which is a heater (108), which at the same time has a heating space (114) arranged underneath for Coffee cups (i16) heated. 24. Coffee machine according to one of claims i to 23, characterized in that that the centrifugal filter (48; 986) is arranged concentrically to the motor shaft (90; 938) and can preferably be coupled directly to this. 25. Coffee machine according to one of claims 1 to 24, characterized in that that for mounting the elastically mounted in the housing, the drive motor (91; 391; 591) comprehensive assembly in the height area between the centrifugal filter (48; 348; 548) and elastic bearing elements (28; 328; 528) arranged on the drive motor are used. 26. Coffee machine according to one of claims 1 to 25, characterized in that that the drive shaft (motor shaft 90; 390; 590; 790; 938) and / or the centrifugal filter (748) have a height-adjustable coupling device (100; 400; 600; 940). 27. Coffee machine according to claim 26, characterized in that the Drive shaft (790; 938) together with the drive motor (591; 936) relative to the operating position of the centrifugal filter (748; 986) is mounted so as to be vertically displaceable. 28. Coffee machine according to claim 26 and / or. 27, characterized in that that for height adjustment a lifting device (832 to 842; 944 to 958) with a Hand lever (838; 948) pivotable about a horizontal axis (shaft 946) is used. 29. Coffee machine according to one of claims 26 to 28, characterized in that that a lifting device with an electric drive is used for height adjustment. 30. Coffee machine according to one of claims 26 to 29, characterized in that that the centrifugal filter (748; 986) surrounding drip tray (740; 970) is pushed into sliding guides (826, 828; 964) like a drawer and by means of a clamping device (826, 828, 832 to 840; 946, 948, 964 to 968) pulled sealingly against a housing surface (extension plate 722; 932) during the clutch stroke will. 31. Coffee machine according to one of claims 28 to 30, characterized in that that the lifting device and / or the tensioning device has an on / off switch (848; 960) for the drive motor (591; 936) operated, which is arranged so that it is in End of the clutch stroke is actuated. 32. Coffee machine according to claim 31, characterized in that the On / off switch sets the drive motor (591; 936) in motion via a timer. 53. Coffee machine according to one of Claims i to 32, characterized in that that a through-flow heater (924) is used as the water heater and preferably in a thermally conductive one Connection to a shelf designed as a hotplate (908) for the Coffee cups (906) is available. 34. Coffee machine according to one of claims 1 to 33, characterized in that that the collecting tray (40; 540; 740; 970) at equal intervals around its circumference has distributed outlets (60; 560; 984). 35. Coffee machine according to claim 34, characterized in that the Outlets (984) are arranged adjacent to the outer circumference of the collecting tray (970) and below a shelf (hotplate 908) for the coffee cups (906) an approximately circular arc-shaped, the footprint heating water heater (924) is arranged. 36. Coffee machine according to one of claims 26 to 35, characterized in that that the centrifugal filter (748) can be adjusted in height relative to the drive shaft (790) is arranged and preferably together with the drip tray (740) and the Shelf (816) for the cups (516) is displaceable.