US3695445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pleated membrane transfer device
Assignee: Becton Dickinson and Co
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Filing: 1970-07-31
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Granted: 1972-10-03
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Expires: 1990-07-31
Abstract
Abstract This disclosure relates to an exchange device employed in desalination, ultra filtration, in the transfer of heat, the transfer of gas from the gas phase to the liquid phase, or the transfer of gases from the gas phase to another gas phase or the opposite sides of a permeable or permselective membrane, or to the traNsfer of waste products from blood to a suitable rinsing fluid. The exchange device is formed of a plurality of flow sheets or plates which are disposed between intermediate portions of a continuous pleated membrane. The flow plates have flow facilitating means formed therein and are reusable while the membrane is disposable.
Inventors
- 👤 William G Esmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:00
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/044; B; B01; B01D; B01D63/00; B01D63/14; F28D; F28D21/00; F28D21/0015; F28D9/00; F28D9/0025; B01D2313/00; B01D2313/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/131
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
An exchange device including a stack of exchange plates with adjacent plates having opposed surfaces separated by a membrane, at least one plate surface of each pair of opposed surfaces being configurated in the form of criss-crossing grooves defining minute projections arranged in rows and the other plate surface of each pair of plate surfaces being planar, there being on opposite sides of each membrane flow passages defined by each membrane in combination with the adjacent pair of plate surfaces, said flow passages along said planar plate surface being defined by the deformation of said membrane into the opposing configurated surfaces and said flow passages being configurated to provide diagonal flow in crossing relation on opposite sides of each membrane, said minute projections defining said flow passages with said flow passages providing for random flow across said opposed surfaces.
Claim 2
Dependent Claim
139 words
An exchange device including a stack of exchange plates with adjacent plates having opposed surfaces separated by a membrane, at least one plate surface of each pair of opposed surfaces being configurated in the form of criss-crossing grooves defining minute projections arranged in rows and the other plate surface of each pair of plate surfaces being planar, there being on opposite sides of each membrane flow passages defined by each membrane in combination with the adjacent pair of plate surfaces, said flow passages along said planar plate surface being defined by the deformation of said membrane into the opposing configurated surfaces and said flow passages being configurated to provide diagonal flow in crossing relation on opposite sides of each membrane, said minute projections defining said flow passages with said flow passages providing for random flow across said opposed surfaces.
Claim 3
Dependent Claim
61 words
The exchange device of claim 1 wherein said criss-crossing grooves define a rectangular grid having an inlet passage along one edge thereof and an outlet passage along an opposite edge thereof, and inlet and outlet ports at diagonally related corners of said grid connected to respective ones of said inlet and outlet passages whereby diagonal flow across said grid is assured.
Claim 4
Dependent Claim
61 words
The exchange device of claim 2 wherein certain of said criss-crossing grooves open directly into said inlet and outlet passages with portions of said grooves within and adjacent said inlet and outlet passages being defined by fins aligned with certain of said rows of projections, said fins forming supports for said membrane to prevent closing of said inlet and outlet passages.
Claim 5
Dependent Claim
39 words
The exchange device of claim 2 wherein said planar surface plate also has an inlet passage and an outlet passage formed therein, all of said inlet and outlet passages being generally parallel to one another and in offset relation.
Claim 6
Dependent Claim
51 words
The exchange device of claim 2 wherein said planar surface plate also has an inlet passage and an outlet passage formed therein, all of said inlet and outlet passages being generally parallel to one another and in offset relation, said planar surface plate and inlet and outlet passages overlie said grid.
Claim 7
Dependent Claim
62 words
The exchange device of claim 2 wherein said planar surface plate also has an inlet passage and an outlet passage formed therein, all of said inlet and outlet passages opening entirely through the respective plate, and each of said inlet and outlet passages progressively increasing in depth from the opposite surfaces of the respective plate from a central area of the plate.
Claim 8
Dependent Claim
90 words
The exchange device of claim 2 wherein said planar surface plate also has an inlet passage and an outlet passage formed therein, said planar surface plate also having inlet and outlet ports at diagonally related corners thereof connected to remote ends of said inlet and Outlet passages whereby diagonal flow across said planar surface is assured, said inlet and outlet ports of a pair of plates being arranged in a generally rectilinear pattern with diagonal flow passages disposed on opposite sides of the membrane disposed therebetween being in crossing relation.
Claim 9
Dependent Claim
15 words
The exchange device of claim 1 wherein said projections are in the form of pyramids.
Claim 10
Dependent Claim
12 words
The exchange device of claim 1 wherein said projections are part spherical.
Claim 11
Dependent Claim
42 words
The exchange device of claim 1 wherein said configurated surface terminates at two opposite ends thereof in an inlet passage and an outlet passage and said configurated surface is in the form of diagonal grooves extending between said inlet and outlet passages.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |