Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/14—Check valves with flexible valve members
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D47/00—Closures with filling and discharging, or with discharging, devices
  • B65D47/04—Closures with discharging devices other than pumps
  • B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
  • B65D47/2018—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure
  • B65D47/2056—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure lift valve type
  • B65D47/2062—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure lift valve type in which the deformation raises or lowers the valve stem
  • B65D47/2075—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge comprising a valve or like element which is opened or closed by deformation of the container or closure lift valve type in which the deformation raises or lowers the valve stem in which the stem is raised by the pressure of the contents and thereby opening the valve

Definitions

• the invention relates to a one-way valve of the kind presented in the preamble to claim 1.
• Such valves often called non-return valves, are to be found in innumerable different embodiments, frequently adapted to suit certain applications.
• Known one-way valves consist of a number of individual parts which, after their production, are assembled to form the finished valve. This increases both the production time and the production cost.
• Packing e.g. such as toothpaste tubes, shampoo con- tainers and soap containers of plastic, eye-drop dis ⁇ ans of plastic or rubber, tubes for adhesives, cartridges for fillers, and on the whole dispensers with which the portioning out is carried out by de ⁇ forming (squeezing) the container or outlet stub, have many practical advantages, but also drawbacks.
• One of the drawbacks is that a reflux suction takes place when" the container is released and the plastic or rub ⁇ ber container or outlet stub springs back to its ori ⁇ ginal shape. Reflux suction can be avoided if the dis- red is made of a plastic deformable material, for example soft metal alloys.
• reflux suction has the great disadvantage that the user has no immediate impression of how much is remaining in the container when it resumes its or ⁇ iginal shape.
• a further drawback as a result of reflux suction is that the container must often first be emptied of air by squeezing it before the remaining part of the contents can be portioned out as desired.
• the object of the invention is to present a one-way valve so that reflux suction can be avoided, said valve being produced at very low cost, thus enabling it to be used in connection with countless different embodiments for packaging or dispensers, for example throw-away packing for fluids, ointments, creams and pastes etc. , which are dosed and consumed over a per ⁇ iod of time.
• valve according to the invention is designed more closely and character ⁇ ized in claim 1.
• the configuration of the valve re ⁇ sults in it being able to be produced by normal in ⁇ jection moulding, and in such a way that apart from the moulding it requires no finishing work, or that after the moulding there is no assembly to be carried out of individual parts.
• the piston is mounted in place in the valve seating.
• valve according to the invention By configuring the valve according to the invention as characterized in claim 2 or 3, the possibility is pro ⁇ vided for adequate clearance the whole way through the valve, so that the medium which is to pass is unhin ⁇ dered in its passage through the valve.
• the spring/ springs and/or the valve stem is hereby deformed, whereby the springs are tensioned.
• the elastic deform ⁇ ed parts will seek to return to their original shape, and will hereby give the valve a closing pressure de ⁇ pending on the extent of the deformation.
• the valve is opened by increasing the pressure under the pis ⁇ ton until this is greater than the torsion in the valve stem from the spring legs, whereby the piston is lifted.
• the one annular surface can constitute the piston's sealing surface against the valve seating, while the other annular surface ensures that the piston can be pressed correctly through the valve opening.
• valve according to the invention as characterized in claim 5, it is achieved that the pis ⁇ ton can be elastically deformed and pressed through the clearance in the valve seating without any great use of force- and without damaging the piston, so that with this finalizing of the valve it does not suffer any damage.
• the material consumption and the weight of the valve are reduced, without any reduction in the function or the strength.
• the valve according to the invention can be configured as characterized in claim 6.
• the means of securing can be a thread, a weld-edge for ultrasonic welding, a glue surface or the like, so that the valve can be secured in the outlet opening of a container in a known manner.
• the valve according to the invention may also be con ⁇ figured as characterized in claim 7, i.e. the valve is completely integrated in the outlet opening or the outlet stub.
• the production costs involved in the man ⁇ ufacture of items in large numbers are hereby further reduced.
• the speed of production is in ⁇ creased and one avoids having to assemble the parts, i.e. the valve and the dispenser, after they have been produced.
• the invention also relates to a method for the prod ⁇ uction of the valve.
• the valve can be produced as characterized in claim 8 or claim 9, all depending on whether the valve is produced as a single part or as an integral part in one with the dispenser.
• valve according to the invention can naturally be used as one-way valve for any medium, whether this be air, fluid or cream.
• the valve is produced chiefly for use as an anti -reflux-suction valve for dispensers.
• fig. 1 shows a valve according to the invention, partly in section and as the valve will ap ⁇ pear when it is injection moulded.
• fig. 2 shows a valve according to the invention, partly in section and with the valve piston in the final position, and
• fig. 3 shows an example of the application of the valve shown in fig. 1.
• valve accor ⁇ ding to the invention produced in one by injection moulding in a plastic or rubber material, said mater ⁇ ial retaining its torsional/springiness characterist ⁇ ics for long into the future.
• Many known materials have this characteristic, e.g. polyethylene. Nylon or synthetic rubber.
• the valve is moulded with a tubu ⁇ lar housing 2 which, on the outer side 3, can have an annular weld-edge 4 for ultrasonic welding or heat welding, or can be moulded with thread 5 as shown in fig. 2 for screwing in.
• the valve can also be glued or melted firmly in the outlet opening of the dispenser in which it is to be used.
• the right-hand part of the valve comprises two spring legs 12, which like a bridge extend over the central opening in the valve from the valve seating 7. At the top point of the bridge, the spring legs 12 extend to form a common valve stem 11 , which in turn extends into the actual valve piston 8.
• the cross-sectional profile 13 of the bridge 11 is shown circular, and the cross-sectional profile 14 of the spring legs 12 is shown rectangular, but these parts can naturally have any other expedient shape.
• the valve piston 8 has the customary circular cross- sectional form with a certain thickness and with a largest diameter around the middle of the piston, and thereafter decreasing diameters to both sides which give rise to two annular surfaces 10,16. Centrally in the piston there is a cavity 15 which increases the flexibility of the valve piston's annular ring edge 22.
• valve 1 In the left-hand part of the valve 1 there is normally a smooth inner surface 6, so that the through-going clearance in the valve is narrowed down only by the valve seating 7 itself.
• valve seating When the valve seating is to be used as a one-way valve, a mechanical pressure is applied to it in the direction shown by the arrow P while the valve hous ⁇ ing is secured.
• the valve piston is thus pressed through the central opening 21 , in that the parts are so flexible that the piston, for reasons of the in ⁇ clined, annular surface 16, can be pressed through the opening 21 without any problems, and the second of the valve piston's annular surfaces 10 will now rest on the sealing surface 9 of the valve seating.
• the sealing is achieved by sealing between the valve piston's surface 10 and the valve seating 1 s surface 9.
• the spring legs 12 are deformed so that tension arises in the valve stem 11, which seeks to close the valve as shown in fig. 2.
• Fig. 3 of the drawing shows a valve according to fig. 1 mounted and glued or welded firmly in a tube, e.g a toothpaste tube 17.
• the outside of tube's stub 18 is provided with a thread 19 for normal tube cap.
• the valve can be configured without the spring force (tension) in the valve stem and/or the spring legs, in that the valve is closed by the reduced pres ⁇ sure in the packing, said reduced pressure arising in the packing's own attempt to regain its "undeformed shape.
• the packing must natur ⁇ ally have a certain stiffness, i.e. it must be prod ⁇ uced of, for example, HD-polyethylene (High Density polyethylene) or similar material, but the actual valve piston needs only a control arrangement which positions the piston.
• valves of the invention shown in figs. 1-3 constitute an independent valve unit.
• the valve can also be configured in one with the container or the stub, so that the tubular housing 2 is completely in ⁇ tegrated with the dispenser, and in such a way that the valve is produced at the same time as and in one with the dispenser or its outlet stub, or at the same time as a part of the outlet stub.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
• Closures For Containers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8130310

Family Applications (1)

Country Status (4)

Families Citing this family (6)

Family Cites Families (5)

• 1987
  • 1987-08-06 DK DK411287A patent/DK156046C/da not_active IP Right Cessation
• 1988
  • 1988-08-05 EP EP19880907260 patent/EP0382739A1/en not_active Withdrawn
  • 1988-08-05 AU AU22671/88A patent/AU2267188A/en not_active Abandoned
  • 1988-08-05 WO PCT/DK1988/000131 patent/WO1989001104A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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