US4461707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafiltration and reverse osmosis tubular membrane module
Assignee: Canadian Patents and Development Ltd
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Filing: 1981-10-30
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Granted: 1984-07-24
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Expires: 2001-10-30
Abstract
Abstract An ultrafiltration and reverse osmosis module comprising a tubular casing having a plurality of tubular membrane assemblies spaced therein by spacing plates, in stepped end portions of the casing bore, and held therein by sealing plates clamped to flanges on the ends of the casing. The tubular membrane assemblies are sealed around bores in the spacing plates and boxes in the sealing plates by "O"-rings and are held against collapse by sleeves in the ends of the tubular membrane assemblies.
Inventors
- 👤 William L. Thayer
- 👤 Adam J. Bennett
- 👤 Oleh Kutowy
- 👤 Srinivasa Sourirajan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:40
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/06; B01D63/062; B01D63/063
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
287 words
An ultrafiltration and reverse osmosis tubular membrane module, comprising: (a) an elongated, open ended, tubular casing having a liquid outlet, connecting flanges at each end, and stepped bore portions at each end, (b) a plurality of tubular membrane assemblies each comprising an inner, membrane tube and an outer porous, support tube supporting the membrane tube, each tubular membrane assembly extending along, and out of each end of, the casing, (c) two spacer plates each having, for each tubular membrane assembly, a tubular membrane assembly locating hole, each spacer plate being located one at each end of the tubular casing and in the stepped bore portion at that end, (d) two sealing plates, one at each end of the tubular casing and covering the spacer plate and the tubular casing flange at that end, the sealing plates each having stepped, tubular membrane assembly holes corresponding to the locating holes in the spacer plates, (e) for each tubular membrane assembly, two support sleeves, with a support sleeve in each end of a tubular membrane assembly, the support sleeves slidably fitting in end portions of the bores of the tubular membrane assemblies and having collar portions outside the tubular membrane assemblies and located against the step in the stepped holes in the sealing plates, (f) means sealing the tubular membrane assemblies to the spacer plates and the sealing plates by being compressed around portions of each tubular membrane assembly that are supported by a support sleeve, (g) means sealing the sealing plates to the flanges, (h) means clamping the spacer plates and the sealing plates together, (i) means clamping the sealing plates to the flanges, and (j) tubular membrane assembly spacing means located intermediate the length of the tubular casing.
Claim 2
Dependent Claim
287 words
An ultrafiltration and reverse osmosis tubular membrane module, comprising: (a) an elongated, open ended, tubular casing having a liquid outlet, connecting flanges at each end, and stepped bore portions at each end, (b) a plurality of tubular membrane assemblies each comprising an inner, membrane tube and an outer porous, support tube supporting the membrane tube, each tubular membrane assembly extending along, and out of each end of, the casing, (c) two spacer plates each having, for each tubular membrane assembly, a tubular membrane assembly locating hole, each spacer plate being located one at each end of the tubular casing and in the stepped bore portion at that end, (d) two sealing plates, one at each end of the tubular casing and covering the spacer plate and the tubular casing flange at that end, the sealing plates each having stepped, tubular membrane assembly holes corresponding to the locating holes in the spacer plates, (e) for each tubular membrane assembly, two support sleeves, with a support sleeve in each end of a tubular membrane assembly, the support sleeves slidably fitting in end portions of the bores of the tubular membrane assemblies and having collar portions outside the tubular membrane assemblies and located against the step in the stepped holes in the sealing plates, (f) means sealing the tubular membrane assemblies to the spacer plates and the sealing plates by being compressed around portions of each tubular membrane assembly that are supported by a support sleeve, (g) means sealing the sealing plates to the flanges, (h) means clamping the spacer plates and the sealing plates together, (i) means clamping the sealing plates to the flanges, and (j) tubular membrane assembly spacing means located intermediate the length of the tubular casing.
Claim 3
Dependent Claim
60 words
A module according to claim 1, wherein the sealing means sealing the tubular membrane assemblies to the spacer plates comprise "O"-rings around each tubular membrane assembly, and the supporting sleeves are barrel-shaped for ease of insertion in the ends of the tubular polymeric membranes and for clamping the tubular membrane assemblies to the supporting sleeves by means of the "O"-rings.
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) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |