Patent US3768660A successfully refreshed from Google Patents.
US3768660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse osmosis cell with turbulator means
Assignee: AQUA MAN Inc A CORP OF CA
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Filing: 1972-02-14
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Granted: 1973-10-30
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Expires: 1992-02-14
Abstract
Abstract A reverse osmosis cell of the type embodying an elongated, hollow, porous core having an osmotic membrane on the exterior thereof. The core with membrane is within a tubular shell, or tube section. The feed fluid is in the annulus between the core and tubular shell. The flow of feed fluid is a continuous series flow in a serpentine channel at pressure and velocity. A flexible helical member encircles the core to provide turbulence and velocity flow adjacent the membrane. The velocity acting against the convolutions displaces them axially allowing them to return when the pressure is released to cause flushing out of any solid particulate matter adjacent the membrane.
Inventors
- 👤 L Block
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:18
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D65/00; B01D65/08; B01D2313/00; B01D2313/02; B01D2313/13; B01D2321/00; B01D2321/20; B01D2321/2008; B01D2321/2016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
In a system embodying an elongated porous core member having an exterior cylindrical surface and having an axial bore presenting a cylindrical surface, a tubular member having the core member within it, a semipermeable membrane covering one of said surfaces, one of said surfaces being exposed to a liquid adapted to permeate through the membrane and through the porous core member; means comprising a flexible, helical member positioned to have convolutions adjacent said one of said surfaces; and means whereby said one surface is exposed to flowing liquid whereby to produce a turbulent velocity flow along said surface, the convolutions of said flexible member being sufficiently flexible that axial flow displaces them axially along said surface, said convolutions returning to initial position when flow is stopped, whereby the axial displacement movement of said convolutions allows any particulate matter adjacent said surfaces to be flushed away.
Claim 2
Dependent Claim
145 words
In a system embodying an elongated porous core member having an exterior cylindrical surface and having an axial bore presenting a cylindrical surface, a tubular member having the core member within it, a semipermeable membrane covering one of said surfaces, one of said surfaces being exposed to a liquid adapted to permeate through the membrane and through the porous core member; means comprising a flexible, helical member positioned to have convolutions adjacent said one of said surfaces; and means whereby said one surface is exposed to flowing liquid whereby to produce a turbulent velocity flow along said surface, the convolutions of said flexible member being sufficiently flexible that axial flow displaces them axially along said surface, said convolutions returning to initial position when flow is stopped, whereby the axial displacement movement of said convolutions allows any particulate matter adjacent said surfaces to be flushed away.
Claim 3
Dependent Claim
22 words
A system as in claim 1, wherein said flexible helical member is within the annulus between the core member and tubular member.
Claim 4
Dependent Claim
23 words
A system as in claim 2, wherein said helical member occupies less than the radial distance between the core member and the tube.
Claim 5
Dependent Claim
46 words
A system as in claIm 1, wherein said elongated core member is closed at one end, said flexible helical member having one end attached to the closed end of said core member and having its other end attached to the other end of said core member.
Claim 6
Dependent Claim
26 words
A system as in claim 4, wherein said core member is formed in sections, and said helical member extending the full length of the core member.
Claim 7
Dependent Claim
74 words
A system as in claim 4, comprising a plurality of cells arranged for flow of feed liquid through them, each cell comprising one of said elongated porous core members within an elongated tube, each cell being mounted at one end, said mounting means constructed to provide a sealed joint and having sufficient strength to prevent the cell from pulling apart as a result of a higher pressure within the cell and exterior to it.
Claim 8
Dependent Claim
33 words
A system as in claim 6, wherein each cell comprises a plurality of sections which are detachable from each other, said semipermeable membrane being discontinuous at the position of the joints between cells.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |