US3910841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stacked exchange device
Assignee: Individual
•
Filing: 1974-04-02
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Granted: 1975-10-07
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Expires: 1994-04-02
Abstract
Abstract This disclosure relates to an exchange device, such as an artificial kidney, wherein a plurality of first plates and second plates are arranged in alternating stacked relation with there being positioned between the plates transfer films. A first of the plates has flow passages formed in opposite faces of central portions thereof, and the second plates being open in alignment with the central portions of the first plates, and the transfer films being arranged in pairs between each of the first plates and forming therebetween a plurality of flow passages as defined by the flow passages in the first plate for a fluid to be treated with a treating fluid flowing between the transfer films and an opposed face of an adjacent first plate in the flow passages formed therein.
Inventors
- 👤 William G Esmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:21
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/08; B01D63/082; B01D63/0822
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
126 words
AN EXCHANGE DEVICE COMPRISING A PLURALITY OF FIRST AND SECOND PLATES ARRANGED IN ALTERNATING RELATION, EACH OF SAID PLATES INCLUDING A FRAME, TRANSFER FILMS EXTENDING BETWEEN SAID FRAMES IN SEALED RELATION THERETO, EACH FIRST PLATE HAVING A CENTRAL CORE OF GREATER THICKNESS THAN ITS RESPECTIVE FRAME, FLOW PASSAGES FORMED IN OPPOSITE FACES OF EACH CENTRAL CORE, EACH SECOND PLATE BEING OPEN WITHIN THE FRAME THEREOF WITH CORES OF ADJACENT FIRST PLATES PROJECTING THEREINTO, FIRST FLOW MEANS FOR INTRODUCING A FIRST FLUID BETWEEN EACH CORE FACE AND AN ADJACENT TRANSFER FILM FOR FLOW THROUGH THE FLOW PASSAGES THEREOF, AND SECOND FLOW MEANS FOR INTRODUCING A SECOND FLUID BETWEEN TWO ADJACENT ONES OF SAID TRANSFER FILMS DISPOSED BETWEEN TWO ADJACENT ONES OF SAID CORES, THE THICKNESS OF EACH
Claim 2
Dependent Claim
126 words
AN EXCHANGE DEVICE COMPRISING A PLURALITY OF FIRST AND SECOND PLATES ARRANGED IN ALTERNATING RELATION, EACH OF SAID PLATES INCLUDING A FRAME, TRANSFER FILMS EXTENDING BETWEEN SAID FRAMES IN SEALED RELATION THERETO, EACH FIRST PLATE HAVING A CENTRAL CORE OF GREATER THICKNESS THAN ITS RESPECTIVE FRAME, FLOW PASSAGES FORMED IN OPPOSITE FACES OF EACH CENTRAL CORE, EACH SECOND PLATE BEING OPEN WITHIN THE FRAME THEREOF WITH CORES OF ADJACENT FIRST PLATES PROJECTING THEREINTO, FIRST FLOW MEANS FOR INTRODUCING A FIRST FLUID BETWEEN EACH CORE FACE AND AN ADJACENT TRANSFER FILM FOR FLOW THROUGH THE FLOW PASSAGES THEREOF, AND SECOND FLOW MEANS FOR INTRODUCING A SECOND FLUID BETWEEN TWO ADJACENT ONES OF SAID TRANSFER FILMS DISPOSED BETWEEN TWO ADJACENT ONES OF SAID CORES, THE THICKNESS OF EACH
Claim 3
Dependent Claim
43 words
The device of claim 1 wherein said first flow means includes an elongated passage at each of two opposite sides of each core partially separating each core from its respective frame, said elongated passages extending transversely of said flow passages in communication therewith.
Claim 4
Dependent Claim
34 words
The device of claim 2 wherein each first plate frame has a supply passage and a return passage disposed in opposite corners thereof with each being in communication with one of said elongated passages.
Claim 5
Dependent Claim
29 words
The device of claim 2 wherein edges of each core are generally bevelled facing said elongated passages for facilitating fluid flow between said flow passages and said elongated passages.
Claim 6
Dependent Claim
25 words
The device of claim 4 wherein said flow passages are defined by upsTanding ribs, said ribs projecting to said elongated passages and overlapping said bevels.
Claim 7
Dependent Claim
18 words
The device of claim 5 wherein said ribs have rounded ends facilitating fluid flow into said flow passages.
Claim 8
Dependent Claim
41 words
The device of claim 5 wherein a majority of said ribs are V-shaped in cross section, and spaced ones of said ribs have flat faces for matching opposed relation to prevent nesting of said ribs and distortion of said flow passages.
Claim 9
Dependent Claim
29 words
The exchange device of claim 5 wherein said ribs are arched with ribs of adjacent first plates being arched in opposite directions and thus in crossing nesting preventing relation.
Claim 10
Dependent Claim
38 words
The device of claim 1 wherein each said second plate frame is spaced from cores nested therein at the ends of said flow passages formed therein to form remote elongated passages for supplying and returning a second fluid.
Claim 11
Dependent Claim
34 words
The device of claim 9 wherein each second plate frame has a supply passage and a return passage disposed in opposite corners thereof with each being in communication with one of said elongated passages.
Claim 12
Dependent Claim
41 words
The device of claim 1 wherein two opposite side edges of each core are bevelled, and like inner edges of each second plate frame has a like bevel with said like inner edges being nested between a pair of said cores.
Claim 13
Dependent Claim
17 words
The device of claim 1 wherein said transfer films comprise a single continuous pleated length of film.
Claim 14
Dependent Claim
58 words
The device of claim 1 wherein said flow passages are defined by a plurality of ribs formed in projecting relation on said cores, a majority of said ribs are V-shaped in cross section, and spaced ones of said ribs have flat faces for matching opposed relation to prevent nesting of said ribs and distortion of said flow passages.
Claim 15
Dependent Claim
49 words
The device of claim 1 wherein said second flow means direct into said exchange device a second fluid at a higher pressure than that of a first fluid wherein said transfer films are deformed apart partially into said flow passages to define other flow passages between said transfer films.
Claim 16
Dependent Claim
47 words
The exchange device of claim 1 wherein said transfer film is asymmetric and has greater transverse elongation when wet than longitudinal, and each transfer film has its transverse direction extending transversely of said flow passages for automatic elongation when wetted and general conformation to said flow passages.
Claim 17
Dependent Claim
52 words
The device of claim 1 wherein said first and second flow means each includes an internal flow passage, a through flow passage, and a transverse passage communicating said internal flow passage and said through flow passage, said transverse passage extending through the respective one of said plates as a smooth reversing curve.
Claim 18
Dependent Claim
75 words
For use in the formation of an exchange device, first and second plates, said plates having matching frames, said first plate having a core within its frame of a greater thickness than said first plate frame, and second plate being open within said frame thereof for the reception of said core, the thickness of said core being equal to the combined thickness of said frames, and said core has flow passages in opposite faces thereof.
Claim 19
Dependent Claim
75 words
For use in the formation of an exchange device, first and second plates, said plates having matching frames, said first plate having a core within its frame of a greater thickness than said first plate frame, and second plate being open within said frame thereof for the reception of said core, the thickness of said core being equal to the combined thickness of said frames, and said core has flow passages in opposite faces thereof.
Claim 20
Dependent Claim
29 words
The plates of claim 17 wherein said core is separated from said frame by longitudinal passages at the ends of said flow passages in communication with said flow passages.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |