Patent US3554378A successfully refreshed from Google Patents.
US3554378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse osmosis module having spirally wrapped reverse osmosis membrane fabric
Assignee: Boeing North American Inc
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Filing: 1968-06-28
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Granted: 1971-01-12
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Expires: 1988-06-28
Abstract
Abstract A reverse osmosis module that minimizes concentration polarization and product fluid pressure drop effects by the use of a fabric having selected hollow fibers. One or more panels of the formed fabric are attached to and spirally wound around a tube and the spirally wrapped unit is inserted into a cylindrical pressure vessel so that a product fluid can be obtained from a feed fluid by the principle of reverse osmosis.
Inventors
- 👤 Arthur L Kohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/02; B01D63/024; B01D63/04; B01D63/043
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
26 words
The spiral module of claim 1 in which said fabric panels are connected to said collector tube means at circumferentially spaced positions on said tube means.
Claim 2
Dependent Claim
21 words
spiral reverse osmosis fabric panel means cooperating with said tube means and having adjacent spiral layers wound around said tube means,
Claim 3
Dependent Claim
90 words
said spiral panel means defining product fluid flow passages connected to said tube channel so that the product fluid forced from the feed fluid passes into said flow passages and then passes into said tube channel; and b. said pressure vessel means having a feed fluid inlet and a feed fluid outlet spaced apart by said spiral module means for maintaining the pressurized feed fluid in contact with said panel means of said module means and further having a product fluid outlet connected to each of said collector tube means.
Claim 4
Dependent Claim
13 words
The spiral module of claim 2 in which said fabric panels are woven.
Claim 5
Dependent Claim
13 words
The spiral module of claim 2 in which said fabric panels are nonwoven.
Claim 6
Dependent Claim
13 words
The spiral module of claim 4 in which said nonplanar portions are corrugated.
Claim 7
Dependent Claim
54 words
The spiral module of claim 1 in which alternate ones of said fabric panels have an inner spiral portion adjacent said collector tube means generally nonplanar and an outer spiral portion generally planar, and intermediate ones of said fabric panels have an inner spiral portion generally planar and an outer spiral portion generally nonplanar.
Claim 8
Dependent Claim
14 words
The spiral module of claim 6 in which said nonplanar portions are suitably corrugated.
Claim 9
Dependent Claim
154 words
A reverse osmosis spiral module for collecting a product fluid from a pressurized feed fluid, the spiral module comprising: a. collector tube means defining a product fluid tube channel and further defining a longitudinally extending axis of the spiral module, b. spiral reverse osmosis nonwoven fabric panels cooperating with said tube means and having adjacent spiral layers wound around said tube means and thereby around said axis, c. said spiral panels defining product fluid flow passages connected to said tube channel and maintained in fluid contact with the pressurized feed fluid so that a product fluid forced from the feed fluid into said flow passages passes into said tube channel, and d. spacer means cooperating with and bonded to said spiral panels generally defining longitudinally extending feed fluid passages between said adjacent spiral layers of said panel means that are oriented parallel with said axis and generally transverse to said product fluid flow passages.
Claim 10
Dependent Claim
18 words
The spiral module of claim 8 in which said spacer means are formed from a flexible plastic material.
Claim 11
Dependent Claim
13 words
The spiral module of claim 8 in which said spacer means are corrugated.
Claim 12
Dependent Claim
49 words
A reverse osmosis system for collecting a product fluid forced from a pressurized feed fluid, the system comprising: a. a plurality of reverse osmosis spiral module means positioned within pressure vessel means for collecting the product fluid from the pressurized feed fluid, each of the spiral module means comprising:
Claim 13
Dependent Claim
57 words
The reverse osmosis system of claim 11 in which said spiral modules define void areas within said pressure vessel means, and said pressure vessel means includes insert means positioned in said void areas so that the pressurized feed fluid is directed to flow through said spiral modules between said feed fluid inlet and said feed fluid outlet.
Claim 14
Dependent Claim
31 words
The reverse osmosis system of claim 11 in which said fabric panel means is a plurality of fabric panels in which selected portions of each of said fabric panels are nonplanar.
Claim 15
Dependent Claim
26 words
The reverse osmosis system of claim 11 in which said fabric panel means is a plurality of fabric panels in which said fabric panels are nonwoven.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |