Patent GB816640A successfully refreshed from Google Patents.
US3879293A
Expired / Lapsed
US
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Membrane diffusion device having inflatable member for pressurization and sealing
Assignee: Baxter International Inc
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Filing: 1974-06-20
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Granted: 1975-04-22
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Expires: 1994-06-20
Abstract
Abstract A membrane diffusion device such as a membrane oxygenator is disclosed which comprises a stack of flat membrane wall pairs and flat membrane supports in alternating, interleaving relation. The stack is disposed in a casing and includes an inflatable member disposed between the opposite major faces of the stack and the casing. A flow conduit provides communication between the inflatable member and the exterior through the casing, to permit pressurization of the opposite major faces of the stack while simultaneously providing sealing for the same faces.
Inventors
- 👤 Jr Ludwig Wolf
- 👤 Robert G Seaverns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:41
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/08; B01D63/082; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1621; A61M1/1631; A61M1/26; B01D2313/00; B01D2313/02; B01D2313/20; B01D2313/203
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
In a membrane diffusion device which comprises a stack of flat membrane wall pairs and flat membrane supports in alternating, interleaving relation, said stack being disposed in a casing, the improvement comprising: an integral inflatable member disposed between opposite major faces of stack and the interior walls of said casing, and also disposed between a side face of the stack, which is disposed between said major faces, and the interior wall of said casing, and a flow conduit communicating with the exterior, and also communicating with said inflatable member, to permit pressurization of said opposite major faces of the stack while simultaneously providing sealing for said major faces and said side face.
Claim 2
Dependent Claim
112 words
In a membrane diffusion device which comprises a stack of flat membrane wall pairs and flat membrane supports in alternating, interleaving relation, said stack being disposed in a casing, the improvement comprising: an integral inflatable member disposed between opposite major faces of stack and the interior walls of said casing, and also disposed between a side face of the stack, which is disposed between said major faces, and the interior wall of said casing, and a flow conduit communicating with the exterior, and also communicating with said inflatable member, to permit pressurization of said opposite major faces of the stack while simultaneously providing sealing for said major faces and said side face.
Claim 3
Dependent Claim
112 words
In a membrane diffusion device which comprises a stack of flat membrane wall pairs and flat membrane supports in alternating, interleaving relation, said stack being disposed in a casing, the improvement comprising: an integral inflatable member disposed between opposite major faces of stack and the interior walls of said casing, and also disposed between a side face of the stack, which is disposed between said major faces, and the interior wall of said casing, and a flow conduit communicating with the exterior, and also communicating with said inflatable member, to permit pressurization of said opposite major faces of the stack while simultaneously providing sealing for said major faces and said side face.
Claim 4
Dependent Claim
112 words
In a membrane diffusion device which comprises a stack of flat membrane wall pairs and flat membrane supports in alternating, interleaving relation, said stack being disposed in a casing, the improvement comprising: an integral inflatable member disposed between opposite major faces of stack and the interior walls of said casing, and also disposed between a side face of the stack, which is disposed between said major faces, and the interior wall of said casing, and a flow conduit communicating with the exterior, and also communicating with said inflatable member, to permit pressurization of said opposite major faces of the stack while simultaneously providing sealing for said major faces and said side face.
Claim 5
Dependent Claim
28 words
The membrane diffusion device of claim 1 in which said inflatable member comprises a pair of plastic sheets sealed together at the edges and folded about said stack.
Claim 6
Dependent Claim
23 words
The membrane diffusion device of claim 2 in which said inflatable member carries means for facilitating even fluid flow distribution within said member.
Claim 7
Dependent Claim
21 words
The membrane diffusion device of claim 3 in which said fluid flow distribution means comprises screening carried within said inflatable member.
Claim 8
Dependent Claim
32 words
The membrane diffusion device of claim 3 in which said flow conduit includes a tube communicating with the interior of said pair of plastic sheets adjacent said side face of the stack.
Claim 9
Dependent Claim
89 words
The membrane diffusion device of claim 5 in which said stack comprises a flexible, elongated strip of membrane lying against a flexible, elongated strip of membrane support, said membrane and membrane support strips being folded in convoluted, pocket forming array, said inflatable member disposed between said opposite major faces and the casing being spaced from the side faces of said stack which are transversely disposed relative to said membrane strip, to permit flow manifolds to be formed adjacent the transverse edges of said membrane strip for fluid communication therewith.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |