Combination ventilation unit and seal for spray heads of spray bottles

• US 5,971,221 A
• Filed: 10/01/1997
• Issued: 10/26/1999
• Est. Priority Date: 10/01/1996
• Status: Expired due to Fees

• Current Assignee: Schwarz, Robert
• Original Assignee: Schwarz, Robert
• Inventors: Schwarz, Robert
• Primary Examiner(s): Kashnikow, Andres
• Assistant Examiner(s): O HANLON, SEAN P
• Application Number:
  US08/942,202
• Time in Patent Office: 755 Days
• Field of Search: 222/189.09, 222/482, 222/481.5, 96/4, 96/11, 96/12, 96/13
• US Class Current: 222/189.09
• CPC Class Codes: B05B 11/0044 compensating underpressure by ingress of atmospheric air into the container, i.e. with venting means venting means for deformable containers B05B11/047
• CPC Class Codes: B05B 11/00444 with provision for filtering or cleaning the air flow drawn into the container
• CPC Class Codes: B05B 7/2408 characterised by the container or its attachment means to the spray apparatus
• CPC Class Codes: B65D 51/1616 by means of a filter
• CPC Class Codes: B65D 51/1622 by means of a passage for the escape of gas between the closure and the lip of the container mouth

Abstract

The invention concerns a closing device (1) for the removal of solid and/or liquid substances from housings, containers, bottles, or the like, which can be filled with a liquid or solid material, consisting of an air intake element (7), which in a manner allowing detachment closes an auxiliary opening of the housing, container, bottle, or the like, and a suction pipe connection (2) and/or a suction pipe (6), which traverse(s) this air intake element (7), whereby the air intake element (7) includes a pressure equalizing device having at least one membrane (5) made of a material which is impervious to liquids and/or solids but permeable by gases, and that the suction pipe connection (2) or suction pipe (6) is joined at its exterior wall to the air intake element (7) as a tight seal against gas and/or liquid.

Claims

1. A closing device for an auxiliary pressure equalization opening of a spray container which can be filled with a liquid or solid, the opening having an outer rim, comprising

a ventilation element which, in a manner allowing for detachment, closes the auxiliary opening of the container, comprising at least one membrane having an upper and a lower surface made from a material that is impermeable to liquids and solids but permeable to gases, and at least one carrier material attached to the upper or lower surface of the membrane, whereby the ventilation element is in contact with the outer rim of the auxiliary pressure equalization opening;

and

at least one of a suction pipe and a suction pipe/suction pipe connection assembly having an exterior wall which traverses the ventilation element, and which is joined with the ventilation element as a tight seal against solids and liquids.

2. The closing device according to claim 1, wherein the membrane comprises a material selected from the group consisting of polypropylene, polyester, polyamide, polyether, polytetrafluoroethylene (PTFE), polysulfone, ethylene tetrafluoroethylene copolymer, fluorinated ethylene propylene (FEP) and tetrafluoroethylene-perfluoro (propylvinyl) ether copolymer (PFA).

3. The closing device according to claim 2, wherein the membrane is made of an oriented microporous polytetrafluoroethylene (PTFE).

4. The closing device according to claim 3, wherein the membrane has a thickness in the range from 1 to 2000 micrometers.

5. The closing device according to claim 4, wherein the membrane has a thickness in the range from 1 to 100 micrometers.

6. The closing device according to claim 2, wherein the membrane is oleophobic.

7. The closing device according to claim 6, wherein the membrane has an oil repelling degree greater than or equal to 4 according to the AATCC 118-1989ASTM test method.

8. The closing device of claim 7, wherein the membrane has an oil repelling degree greater than or equal to 8 according to the AATCC 118-1989ASTM test method.

9. The closing device according to claim 1, wherein the membrane has a thickness in the range from 1 to 2000 micrometers.

10. The closing device according to claim 9, wherein the membrane has a thickness in the range from 1 to 100 micrometers.

11. The closing device according to claim 1, wherein the membrane is filled or coated with at least one material selected from the group consisting of an absorbent material and a catalyst.

12. The closing device according to claim 1, wherein the membrane is laminated onto the at least one carrier material.

13. the closing device according to claim 12, wherein the carrier material comprises at least one material selected from the group consisting of a felt, a woven, a knit, a perforated plate and a grid.

14. The closing device according to claim 12, wherein the carrier material has ventilation channels.

15. The closing device according to claim 14, wherein the carrier material has ventilation channels in a portion of the material.

16. The closing device according to claim 12, wherein the carrier material comprises at least one material selected from a group consisting of polypropylene, polyester, polyamide, polyether, polytetrafluoroethylene (PTFE), polysulfone, ethylene tetrafluoroethylene copolymer, fluorinated ethylene propylene (FEP), tetrafluoroethylene-perfluoro (propylvinyl) ether copolymer (PFA), uncoated metal, and coated metal.

17. The closing device according to claim 12, wherein the membrane is sandwiched between two carrier materials.

18. The closing device according to claim 12, wherein the carrier material is sandwiched between two membranes.

19. The closing device according to claim 12, wherein the at least one layer of carrier material contains at least one of an absorbent material and a catalyst.

20. The closing device of claim 1, comprising a suction pipe/suction pipe connection assembly, wherein the suction pipe connection is sprayed onto the ventilation element and is integrally joined to it.

21. The closing device according to claim 20, wherein the suction pipe is inserted into the suction pipe connection.

22. The closing device according to claim 20, wherein the suction pipe is capable of sliding within the suction pipe connection.

23. The closing device according to claim 1, wherein a suction pipe is joined with the ventilation element in the absence of a suction pipe connection.

24. The closing device according to claim 23, wherein the ventilation element further comprises a bore hole, and further wherein on the interior of the bore hole of the ventilation element a suction pipe seal is sprayed on, in which the suction pipe is positioned so as to form a tight seal and be capable of sliding.

25. The closing device according to claim 24, wherein the suction pipe together with a suction pipe seal is sprayed on inside the bore hole of the ventilation element.