Patent US3786925A successfully refreshed from Google Patents.
US3786925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for sealing membrane carrying tubes
Assignee: AQUA MAN Inc A CORP OF CA
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Filing: 1972-02-14
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Granted: 1974-01-22
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Expires: 1992-02-14
Abstract
Abstract An osmotic membrane bridges over the joint between an end core fitting and the end of a tubular porous core member and alloys with the material of the core fitting. The joints may be between modules joined or coupled by male and female plastic core fittings linked together by bayonet joints. This assembly is adapted to use in reverse osmosis machines with the joined modules in a tubular shell forming an annulus with concentrate in the annulus under pressure. The bayonet joints prevent pulling apart of the modules.
Inventors
- 👤 L Block
- 👤 F Shippey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:54
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/08; B01D2313/00; B01D2313/02; B01D2313/13
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A filter element comprising; a porous core member having a cylindrical exterior surface and a bore therethrough having a cylindrical surface; a connector fitting of material other than that of said core member secured to an end thereof and having inner and outer cylindrical surfaces constituting axial continuations of said exterior surface and the surface of said bore; and a permeable membrane covering one of said surfaces of said core member, extending across the joint between said core member and fitting and being sealingly secured to said fitting.
Claim 2
Dependent Claim
88 words
A filter element comprising; a porous core member having a cylindrical exterior surface and a bore therethrough having a cylindrical surface; a connector fitting of material other than that of said core member secured to an end thereof and having inner and outer cylindrical surfaces constituting axial continuations of said exterior surface and the surface of said bore; and a permeable membrane covering one of said surfaces of said core member, extending across the joint between said core member and fitting and being sealingly secured to said fitting.
Claim 3
Dependent Claim
31 words
A filter element as in claim 1, wherein said membrane is on the outside of said core member and bridges the outside of the joint between the core and said fitting.
Claim 4
Dependent Claim
32 words
A filter element as in claim 2, wherein the membrane material and the fitting material are constructed of materials such that they unite chemically to form an alloy of the two materials.
Claim 5
Dependent Claim
17 words
A filter element as in claim 1, wherein said fitting has threaded engagement with the core member.
Claim 6
Dependent Claim
88 words
A filter element as defined in claim 1 wherein said fitting is configurated to constitute the one part of a coupling having male and female parts, said core member having a fitting at the opposite end configurated to constitute one part of a coupling having male and female parts, said male and female parts being constructed to provide a bayonet joint for holding them together against axial pressure and in sealing relationship, whereby a plurality of core members and fittings can be assembled into a continuous elongated unit.
Claim 7
Independent Claim
113 words
A system embodying a plurality of relatively short porous members each having an exterior cylindrical surface and having an axial bore presenting a cylindrical surface; a semipermeable membrane covering one of said surfaces; a plurality of fittings of material other than that of the core members secured to the ends of core members; and means whereby the ends of fittings are securable together to form separable sealed joints, whereby a relatively long assembly can be formed of relatively short porous core members and fittings detachably secured together in axial alignment, said semipermeable membrane bridging the joints between the ends of core members and their corresponding fittings and being sealingly secured to said fittings.
Claim 8
Independent Claim
113 words
A system embodying a plurality of relatively short porous members each having an exterior cylindrical surface and having an axial bore presenting a cylindrical surface; a semipermeable membrane covering one of said surfaces; a plurality of fittings of material other than that of the core members secured to the ends of core members; and means whereby the ends of fittings are securable together to form separable sealed joints, whereby a relatively long assembly can be formed of relatively short porous core members and fittings detachably secured together in axial alignment, said semipermeable membrane bridging the joints between the ends of core members and their corresponding fittings and being sealingly secured to said fittings.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |