DE2231702A1 - LIQUID TAP - Google Patents

Description

PATENT ATTORNEY S B O R O HOMSlN - TlEDTKE - Bühling

T6L. (OiH) S30211 HUX: 8-24 3Ö3 tejSat 2 2 3 1 7 fi 9

PATENT A'NWÄLTB

Munich·. Ffarfkfurt / M ,:

Dipl.-Chem.Dr.D.ThomSört Dipl.-Ing. W. Welnkauff

Dipl.-Ing. H. Tiedtkö (Fuchshohl 71)

Dipl.-Chem. ö. Bühllng
Dipl.'tng. Ft. Chins
Dlpl.-Chöm. Dr. U. Eggere

8000 Munich 2 Kaiser-Ludwlg-Platjs6 June 28, 1972

IMI Öpella Limited
Bii * minghatn, Great Britain

Liquid tap

The invention relates to liquid taps

Normal plumbing taps have a body with a connecting pipe connected in one piece to it, whereby from an opening extends through the body of the connecting pipe, as well as a valve actuating device which has a valve closure body moved towards and away from a valve seat surface.

According to the invention, a fluid tap has a Body with an opening which extends through the body and which has a detachable and sealing connection pipe

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de unit, consisting of a connecting pipe, a Housing which houses a valve operating device and a valve closure body which has a valve opening within the unit opens and closes when it is moved in the respective direction by the actuating device wherein the unit further comprises a channel having an inlet channel within the connecting pipe with an outlet of the tap connects when the valve port is open.

With the construction according to the invention it is possible use differently shaped bodies while the the same construction of the valve actuating device and the unit consisting of the housing and the connecting pipe is used therefore as many parts of the same design as possible can be used with differently designed body shapes, whereby the total costs in the area of faucet constructions can be reduced to the absolute minimum.

The unit of housing and connecting pipe can be a composite body, in which the connecting pipe and the housing according to their production are interrelated. With a preferred Embodiment that can be produced relatively economically, the unit consists of plastic material and is produced in one piece by casting.

The unit can be built into the body by any suitable means and can be threaded into the body Opening to be included. However, it simplifies the manufacturing process where no internal threads are used, namely

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especially in the case where the body is made of plastic material is to be produced by Pormgieß. It is preferred that the unit by axial displacement in the opening in a Operating position can be brought, for which case first and second devices are provided for axial movement of the unit to prevent their operational situation in one direction or the other. It is very advantageous if the first device is a nut which sits on an external thread of the connecting pipe and which at one end of the opening exerts an axial thrust on a body surface or which exerts an axial thrust on one side of an object on which the tap is to be attached, so as to prevent axial movement of the unit in one direction. To prevent a movement in the other direction, the second device consists of stop surfaces of the unit and body. In this Case, the opening can be provided with a step which is formed by reducing its diameter, one being axial running surface of the step forms one of the contact surfaces and rests against a surface of the unit. Alternatively extends a protrusion or protrusions of the body extend into the opening and abut against a surface of the unit. To the However, it becomes manufacturing simplification and cheaper preferred that the opening has a constant cross-sectional shape and constant Cross-sectional area along its length with a stop on the unit in working contact with an outer surface of the body comes, which is located at a distance from the first device, so that the body is captured between the devices to prevent axial movement of the unit.

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The invention is explained in more detail below with reference to schematic drawings of several embodiments.

Fig. 1 is a cross-sectional view of a liquid faucet attached to a spout top is;

Fig. 2 is a sectional view through part of a liquid faucet which is a modification of the represents first embodiment;

Fig. 3 is a partially sectioned side view

a mixer fitting which forms the second embodiment of the invention;

FIG. Ί is a representation corresponding to FIG. 3 and shows a third embodiment of FIG Invention.

As can be seen from Fig. 1, a liquid faucet of a first embodiment has a body 1 with a cylindrical opening 2 which extends from the head to the bottom of the body and which receives an integral unit of connecting tube and housing for a valve operating device h . The body and the housing as well as the parts of the device are all cast from an acetal copolymer. Of course, other suitable plastic materials can also be used. The body is also provided in one piece with an outlet spout 5, the outlet channel of which extends into the opening 2.

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The unit 3 is slidably seated in the opening 2, so that a connecting pipe 7 of the unit follows from the opening extends below when the unit is in an operative position within the body. The unity is in this Position held by first and second devices which prevent their movement. The first of these facilities has a connecting pipe nut 8 for holding the tap on a spout 9 · The connecting pipe extends through a hole 10 in the top of the spout, with the nut screwed onto the connecting pipe and against the bottom surface of the top the sink is tightened. The second device for holding the unit in an axially fixed position has a stop device, which is formed by a radially extending pad 11 at the head of the unit and which is the upper one outer surface of the faucet body at the end of the opening 2 detected. The faucet body is therefore between the paddock 11 and the nut 8 held in its position. If the opening 2 is cylindrical, then something must be provided to rotate the unit within to prevent the body when actuating the valve actuator. This measure expediently takes the form of four small tabs 12 which are provided on the unit at the base of the connecting pipe and which extend from the corners of the hole 10 inside the top of the spout, this hole being square in the usual way.

If the unit is built into the body in the above manner, then threads are used to connect of unity and body avoided, so that the molding of the two

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Parts is simplified. Casting or injection molding is further simplified by giving the opening 2 a simple cylindrical shape. The unit is sealed to the body to prevent passage of water from the faucet, with the aid of two rubber O-rings or other plastic seals 13 'which are received in annular grooves 14, located near the head and the bottom of the unit - are located. The tap body itself is sealed against the spout top by a further O-ring seal 15 which is housed in an annular groove in the lower end face of the body. The arrangement of this groove is possible in that the connecting pipe forms part of the unit 3 so that part of the casting mold for the manufacture of the faucet body can be pulled axially away from the bottom surface of the body, whereby the recess can be formed in the formation of the faucet body . In conventional faucets in which the connecting pipe forms part of the body, in the event that the body is manufactured by molding or injection molding, molded parts must be pulled radially away from the connecting pipe, so that in this manufacturing process there is no recess or recess in the bottom surface of the Body can be formed. Such a recess would then have to be replaced by a further manufacturing process, e.g. B. post-processing, which increases the cost of the faucet. There is therefore usually a flat seal between the tap body and the top of the spout. In the embodiment described, however, the O-ring is preferred to the usual planar seal, since it can be assumed that the former provides a better seal and otherwise cannot be seen when the

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Hahn is firmly mounted.

The unit 3 is also integrally provided with a valve seat surface 17, which is located at the end of a inside the Connecting pipe located inlet channel 18 facing upwards and enclosing a valve opening 19 of the unit. Above the seat 17 continues from the opening a bore 20 which has a non-circular cross-section at its lower end, for which an explanation will be given later, and that with the help of radial channels 21 with one located on the outside Annular recess 22 of the unit are connected, which is located between the seals 13 and which in turn with the Outlet channel 6 of the spout is connected. If the valve seat surface is not covered so that the valve opening is open, water can enter the inlet channel 18 upwards, then through the channels 21 into the annular recess 22 and finally outwards through the channel 6 stream.

Within the bore 20 is the valve actuator H. This is different from that type in which a hubfreie actuating spindle is provided, and which has a valve actuating spindle 23 which is rotatably received in the head of the bore 20th The actuating spindle is held in its axial position in one direction within the bore by a retaining nut 21, which is screwed onto the outside of the unit 3 and which presses an O-ring seal 25 onto an annular flange 26 of the spindle. The bore 20 has a circular cross-section at this point. The spindle is in .the other

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Direction axially held by a tap knob 27, which is received on a grooved end 28 of the spindle 23 and held in place with the aid of a countersunk screw 29, the knob being close to the nut 2k .

The valve actuating device also has a valve closing spindle 30 which has a non-circular cross section which corresponds to the lower end of the bore 20 so that its rotation within the unit 3 is prevented while at the same time Axial movement is allowed. When turning the rotary knob 27, the actuating spindle 23 is rotated so that depending on the direction of rotation the spindle 30 is raised or lowered and the valve closure body in the form of a disk 31 is removed from the seat surface 17 is moved away or towards this in order to open or close the valve opening.

In the embodiment described above, the Spindle 30 held completely radially inside the body of the tap in the lower position of the spindle in which the valve is closed is whereby most of the actuator is located within the body and does not protrude from it. In the event that a handwheel or rotary knob is used which is designed to cover parts of the device, this leads to the fact that the rotary knob as shown in the drawing is relatively small and at the same time can serve the desired purpose. In conventional liquid faucets, which have conventional head nut designs, in the the actuator is fixed, are larger knobs

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necessary to cover the parts of the actuation device, even with non-stroke spindles, because simply one more of the device protrudes over the tap body than in the embodiment according to the invention.

Furthermore, regardless of the advantages described above, new taps can be developed which have differently shaped bodies and always accommodate the same construction of valve actuating device and unit of housing and connecting pipe as described above. This therefore means that the overall manufacturing cost of a series of faucets using these common parts can be reduced. A further reduction of manufacturing costs resulting from the invention in that the opening 2 smooth within the ^r body for receiving the unit cylindrical shape hat.I In a in Fig. 2 shown modification of the first embodiment, the same valve body and the same unit 3 is used However, the tap differs in that it receives a valve actuating device that does not have a non-stroke actuating spindle. In this case, the retaining nut 24 is replaced by a nut which is screwed onto "the end of the unit 3 and has an internally threaded cylindrical portion 33 from which a valve closing spindle 3 ^ is received with thread engagement, which is normally carried out by rotating a Cross head 35 operates to move the valve closure body vertically towards or away from the valve seat surface 17.

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The other embodiments as now described refer to valve constructions which, as in the first embodiment, are made of acetal polymer.

In the second embodiment of FIG. 3 has a mixer fitting or a mixer tap which is to be attached to a wall 37, a tap body 38 which has two cylindrical openings 39, which each receive a one-piece unit 40 comprising a connecting pipe and housing for the valve actuating device. As explained with reference to the first embodiment, is the unit inside the body by O-rings 41 in grooves 42 of the unit sealed.

In this particular embodiment, each connection pipe 43 is eccentric with respect to the axis of the housing 44 and the opening 39 to enable the mixer tap to be mounted in cases where the distance between the centers of the water delivery pipes differs from the distance between the axes of the openings 39 differs. When the units are rotated within the openings, the connecting pipes thus move towards or away from one another, so that the tap can be coupled to the pipes when the connecting pipes are correctly assigned.

When the faucet is on wall 37, means are provided to allow axial movement of each unit to prevent the tap body. According to the first embodiment, a first of these devices has a nut 45,

which is received on the connection pipe of each unit and is supported against the wall. At. this embodiment is the

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second means a nut 46 connected to the other end of the Unit 40 is in thread engagement and which is in working contact with an annular surface of the body around the end of the opening 39 stands. The body is fixed in position between the wall and the nut 46 in this way. How best to get out of this Embodiment can be seen by using the nuts 45 and 46 indicate the operational position of each unit 40 as required different wall thicknesses can be adapted.

As described with reference to the first embodiment, each unit 40 has a valve seat surface kj which, when uncovered, allows water to pass through the inlet 48 within the connecting pipe and through the radial channels 49 and into the annular groove 50 and then through a channel 51 in the body from where the water can flow in the direction of the tap spout (not shown) which has an outlet channel 52.

The valve actuating device 53 has a stroke-free one Actuating spindle and has an outer nut 54 which the Enclosed stroke-free spindle. This nut is threadedly engaged in the end of the unit 40 on which the nut 46 is provided and has a flange 55 which abuts one end face of the unit. A valve closing stem 56 protruding from the nut 54 carries a valve closure body in the form of a disk 57 in order to close the valve seat surface 47.

The design of this embodiment brings the same advantages as with the first embodiment

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have been explained and which consist in the fact that the manufacture of the body is simplified, in particular taking into account the fact that the openings 39 are cylindrical and that taps are relatively inexpensive to manufacture in a large range of molds can be that always accommodate the same unit of housing and connecting pipe. The cost of this construction is also reduced to a minimum in that an integrally cast unit comprising housing and connecting pipe is used.

In a third embodiment according to FIG a mixer tap an embodiment in which the main part is hidden under a horizontal surface and only the rotary knobs and the outlet for mixed water protruding from this surface.

As shown in Fig. 1, the mixer tap has a body with a central portion 58 which serves as a mixing chamber for water entering the two sides of portion 58 of tap body portions which receive the actuators for hot and cold feed water. Only one of these body parts 59 is shown in the drawing, since the other body part is identical to this. The body portion or body part 59 has a substantially cylindrical part βθ with a cylindrical opening 61 which receives a unit 62 of a one-piece connecting pipe 53 with housing 64 for a valve actuating device 65. The cylindrical portion of the body is below a horizontal support 66 with the unit 62 protruding upward through the support. The combined unit and tap body section 59

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is held in place between a shoulder 67 of the unit 62 and a nut 68 which is received on the connecting pipe 63. The shoulder 67 abuts against an annular plastic ring 69 which is located on the upper side of the support device 66 and is provided with a rubber seal or plastic seal 70 which is in contact with the support device. Two O-ring seals 71 'housed in end recesses of the cylindrical section seal against the outer surface of the unit 62 on either side of an annular groove 73 provided in the unit. The annular groove extends through radial channels Jk of the unit with an internal bore 75 within the connecting pipe so that water may be used in connection flow along a channel 76 in the tubular part of the portion 59 and into the portion 58 in which the mixing takes place. the section 58 also has an outlet 77 for mixed water, which projects through the support means 66 and at this is attached.

The device 65 has a stroke-free actuating spindle 78, which with the aid of a retaining nut 79 and a rotary knob 8O is axially fixed in the same way as was explained with reference to the first embodiment. It can therefore the spindle 68 can be rotated within a cylindrical upper portion of a bore 81 of the unit 62. Within a lower, non-cylindrical portion of the bore 8l is a valve closure body 82, of which a surface portion is in working contact with a complementarily shaped non-circular part of the bore 8l to rotate the spindle 82 to prevent. By turning the spindle 78 the spindle moves axially, thereby opening the valve closure body

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83 in the direction of the valve seat surface 84 or away from it to move.

As in the case of the embodiments described above, this embodiment also ensures simplified manufacture of the body section 59 of the faucet, namely in that a cylindrical opening which receives the unit 62 extends through the body section. Also, the recesses for receiving the O-ring seals 71 and 72 can be easily produced by molding, since they are located at the end of the cylindrical portion. As can be seen from this embodiment, the faucet body section 59 and the section corresponding thereto and located on the other side of the faucet are manufactured separately from the central section 58 in order to facilitate manufacture. simplify. These parts are then attached to the central portion 58, preferably by welding the plastic material of the parts together. This can be achieved by an induction welding process, which according to Pig. ¹ I involves the use of a copper wire 85, which is located within a recess of the end of the body portion 59 and is completely enclosed by the Körperabechnitt 58 which extends fully about it, so that the wire is in close contact with the plastic material of the two parts, The drawings show the shape of the opposing surfaces of sections 58 and 59 of the faucet prior to welding. An electric current is then sent through the copper wire, so that the surrounding plastic material is melted and the parts melt together under embedding

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of the wire into the plastic.

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Claims (11)

223Ί702 Claims ../ fluid valve with a body having a passing through it opening that receives a valve actuator, with a Ventilverschlußkorper which is movable by the means for detecting a valve opening at actuation to open the device, or to close, and further comprising a connecting pipe with a inlet channel ater, wherein the valve further comprises a water outlet, characterized for V /, that the connecting pipe (7, ^ 3, 63) a part of a unit (3, ^ O, 62), further comprising a · housing ⁽¹ J ^, 6H). For the valve actuating device (4, 53, 65), the unit being releasably and sealingly received within the opening (2, 39, 61) of the body (1, 38, 59) and the valve opening (19 ) and has a channel (21, 22, * »9, 50, 73, 7 * 0, which connects an inlet channel within the connecting pipe to the outlet (6, 52, 77) of the tap when the valve opening is open. 2. Tap according to claim 1, characterized in that the unit is a composite unit or composite unit is, in which the connecting pipe and the housing have been connected to one another after their manufacture. 3. Tap according to claim 1, characterized in that the unit is formed from plastic material and in one piece cast or molded. 20988 3/0717 4. Tap according to claim 1, characterized in that the unit is provided with ^{annular recesses (I 1} I, 42) which receive sealing rings (13, 4l) which seal against the surface of the opening within the tap body. 5. Tap according to one or more of the preceding claims, characterized in that the unit is pushed in is brought into an opening in an operating position within the body and that first and second devices (8, 11, 45> 46 ^ 67, 68) are provided to allow axial movement in the to prevent one or the other direction of the unit out of this operating position. 6. Tap according to claim 5, characterized in that the first device which prevents the axial movement of the unit, is formed by a nut (68, 46, 8) on a External thread of the connecting pipe can be screwed to the surface of the body located at one end of the opening To exert axial thrust or to exert axial thrust on one side of an object to which the faucet is to be attached in order to this way to prevent axial movement of the unit in one direction. 7. Faucet according to claim 5 or 6, characterized in that the second device which controls the axial movement of the unit prevents from contact surfaces (11, 45, 67) is formed by the unit and body. 209883/0717 8. Tap according to claim 7, characterized in that the opening has a constant cross-sectional area over its length and that a stop is provided on the unit, which is connected to an outer one remote from the outer device Surface of the body is in working contact. 9. Tap according to one or more of the preceding claims, characterized in that the opening is cylindrical is. 10. Tap according to one or more of the preceding claims, characterized in that the housing has a valve actuating device which has a stroke-free actuating spindle (23, 78) which is rotatable within the housing is held and which is in thread engagement with a valve closing spindle (30, 56, 82) is located, which is axially displaceable and non-rotatably seated in the housing, with axial movement of the valve closing spindle in one direction or the other as a result Turning the valve operating spindle opens or closes the valve port. 11. Cock according to claim 10, characterized in that the valve closing spindle (30) is located radially inside the cock body (1) is at least in the position: in which it is when the valve opening is closed. 20988-3 / 0717