EP0155115A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Gas venting device
Assignee: W.L. Gore and Associates Inc
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Filing: 1985-02-27
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Granted: —
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Expires: 2005-02-27
Abstract
Abstract A venting device for permitting air to be vented from a water mains comprises a filter 13 arranged between a vent cap 14 and a cylindrical housing 12 and connected to a water mains through a coupling 11. The filter comprises a sheet of waterproof air-pervoius plastics material 13b such as a suitably stretched and micro-porous P.T.F.E. sheet supported on an air-pervious support 13a in particular a sintered porous metal or ceramic support.
Inventors
- 👤 Edward George Norman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 04:14
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0031
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
A device for venting air or water vapour or other gaseous fluid from a water mains or other liquid containing system without also venting the system liquid, which comprises a filter (13) consisting of a waterproof plastics membrane (13b) which is permeable by said gaseous fluid and is mounted on a support (13a or 13c) which is also permeable to said gaseous fluid and has a capacity for withstanding fluid pressure substantially greater than that of the unsupported membrane.
Claim 2
Independent Claim
79 words
A device for venting air or water vapour or other gaseous fluid from a water mains or other liquid containing system without also venting the system liquid, which comprises a filter (13) consisting of a waterproof plastics membrane (13b) which is permeable by said gaseous fluid and is mounted on a support (13a or 13c) which is also permeable to said gaseous fluid and has a capacity for withstanding fluid pressure substantially greater than that of the unsupported membrane.
Claim 3
Dependent Claim
79 words
A venting device comprising a vent cap (14), a housing (12), a filter (13) arranged therebetween and a coupling (11) for connecting the housing to a water mains, the filter comprising a support (13a or 13c) which is permeable by air and water and, mounted thereon, a waterproof plastics membrane (13b) which is permeable by air and water vapour but impermeable by water in liquid form and whose capacity for withstanding fluid pressure is substantially increased by said support.
Claim 4
Dependent Claim
79 words
A venting device comprising a vent cap (14), a housing (12), a filter (13) arranged therebetween and a coupling (11) for connecting the housing to a water mains, the filter comprising a support (13a or 13c) which is permeable by air and water and, mounted thereon, a waterproof plastics membrane (13b) which is permeable by air and water vapour but impermeable by water in liquid form and whose capacity for withstanding fluid pressure is substantially increased by said support.
Claim 5
Dependent Claim
20 words
A device according to claim 1 or claim 2 characterised in that said membrane is a microporous membrane of polytetrafluoroethylene.
Claim 6
Dependent Claim
18 words
A device according to claim 3 characterised in that said membrane has a pore size below 1.0 micron.
Claim 7
Dependent Claim
18 words
A device according to claim 3 characterised in that said membrane has a pore size below 0.2 micron.
Claim 8
Dependent Claim
25 words
A device according to claim 3 characterised in that said membrane will prevent passage of water therethrough at pressures of at least 7 psi (48kPa).
Claim 9
Independent Claim
23 words
A device according to any preceding claim characterised in that said membrane will filter air therethrough at pressures up to 300 psi (2068kPa).
Claim 10
Independent Claim
19 words
A device according to any preceding claim characterised in that said membrane has a thickness between 0.0025 and 1.0cm.
Claim 11
Independent Claim
28 words
A device according to any preceding claim characterised in that the membrane is attached to a backing of non-woven polypropylene fibre or woven polypropylene or polythene or polyester.
Claim 12
Independent Claim
22 words
A device according to any preceding claim. characterised in that the support (13a) comprises sintered porous metal or ceramic, or plastics foam.
Claim 13
Independent Claim
42 words
A device according to any one of claims 1 to 9 characterised in that the support comprises a wire mesh (13c) permanently secured to the membrane (13b) and a porous disc (13a) of sintered metal, glass, ceramic or plastics in juxtaposition therewith.
Claim 14
Dependent Claim
28 words
A device according to claim 11 characterised in that the membrane (13b) and wire mesh (13c) are secured together by a plastics rim (13d) fitted or moulded thereon.
References Cited (Backward Citations)
No citation records indexed.
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