US3841837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygenator
Assignee: Tecna Corp
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Filing: 1972-10-05
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Granted: 1974-10-15
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Expires: 1992-10-05
Abstract
Abstract An oxygenator primarily for human blood has a stator with a cavity partly defined by a first substantially flat wall and a peripheral wall and has a rotor with a second substantially flat wall facing the first wall. On their facing sides both walls have supports highly permeable to gas. Both supports are covered by gas-permeable, hydrophobic membranes between them defining a passage for liquid extending from near the center of the cavity to near the peripheral wall. Gas is conducted through the supports and membranes on the stator and on the rotor. Blood is supplied through the stator to the cavity near the center thereof and, without an external pump, is impelled to flow through the passage and out an outlet in the peripheral wall, the membranes having irregularities or vanes acting as centrifugal impellers.
Inventors
- 👤 S Kitrilakis
- 👤 T Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:17
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; A61M1/26; A61M1/262; A61M1/267; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/113; A61M60/20; A61M60/205; A61M60/216; A61M60/226; A61M60/232; A61M60/30; A61M60/36; A61M60/38; A61M60/40; A61M60/403; A61M60/422; A61M60/80; A61M60/802; A61M60/827; B; B01; B01D; B01D63/00; B01D63/16; B01D69/00; B01D2315/00; B01D2315/02; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
239 words
AN OXYGENATOR COMPRISING A STATOR HAVING A DISC-LIKE CAVITY DEFINED BY A PAIR OF SLIDE WALLS AND A PERIPHERAL WALL; A SHAFT; MEANS FOR JOURNALLING SAID SHAFT IN SAID STATOR; A ROTOR ON SAID SHAFT AND HAVING A ROTOR WALL DISPOSED IN SAID CAVITY; FIRST SUPPORT MEANS PERMEABLE TO GAS IN SUBSTANTIALLY ALL DIRECTIONS AND EXTENDING FROM SAID SIDE WALLS; FIRST MEMBRANES PERMEABLE TO GAS BUT NOT READILY PERMEABLE TO LIQUID IN CONTACT THEREWITH AND DISPOSED AGAINST SAID SUPPORT MEANS ON THE SIDE THEREOF OPPOSITE SAID SIDE WALLS; SECOND SUPPORT MEANS PERMEABLE TO GAS IN SUBSTANTIALLY ALL DIRECTIONS AND EXTENDING FROM SAID ROTOR WALL ON THE SIDE THEREOF TOWARD SAID SIDE WALL; SECOND MEMBRANES PERMEABLE TO GAS BUT NOT READILY PERMEABLE TO LIQUID IN CONTACT THEREWITH AND DISPOSED AGAINST SAID SECOND SUPPORT MEANS ON THE SIDE THEREFORE OPPOSITE SAID ROTOR WALL AND SPACED FROM SAID FIRST MEMBRANES TO LEAVE A PASSAGE THEREBETWEEN EXTENDING FROM ADJACENT THE CENTER OF SAID CAVITY TO THE PERIPHERY THEREOF; MEANS IN SAID ROTOR FOR CONDUCTING GAS INTO SAID STATOR, THROUGH SAID FIRST SUPPORT MEANS AND OUT OF SAID STATOR; MEANS IN SAID ROTOR FOR CONDUCTING GAS INTO SAID ROTOR, THROUGH SAID SECOND SUPPORT MEANS AND OUT OF SAID ROTOR; INLET MEANS IN SAID STATOR FOR CONDUCTING LIQUID INTO SAID CAVITY AND INTO SAID PASSAGE ADJACENT THE CENTER OF SAID ROTOR; AND OUTLET MEANS IN SAID PERIPHERAL WALL FOR CONDUCTING LIQUID OUT OF SAID CAVITY.
Claim 2
Dependent Claim
239 words
AN OXYGENATOR COMPRISING A STATOR HAVING A DISC-LIKE CAVITY DEFINED BY A PAIR OF SLIDE WALLS AND A PERIPHERAL WALL; A SHAFT; MEANS FOR JOURNALLING SAID SHAFT IN SAID STATOR; A ROTOR ON SAID SHAFT AND HAVING A ROTOR WALL DISPOSED IN SAID CAVITY; FIRST SUPPORT MEANS PERMEABLE TO GAS IN SUBSTANTIALLY ALL DIRECTIONS AND EXTENDING FROM SAID SIDE WALLS; FIRST MEMBRANES PERMEABLE TO GAS BUT NOT READILY PERMEABLE TO LIQUID IN CONTACT THEREWITH AND DISPOSED AGAINST SAID SUPPORT MEANS ON THE SIDE THEREOF OPPOSITE SAID SIDE WALLS; SECOND SUPPORT MEANS PERMEABLE TO GAS IN SUBSTANTIALLY ALL DIRECTIONS AND EXTENDING FROM SAID ROTOR WALL ON THE SIDE THEREOF TOWARD SAID SIDE WALL; SECOND MEMBRANES PERMEABLE TO GAS BUT NOT READILY PERMEABLE TO LIQUID IN CONTACT THEREWITH AND DISPOSED AGAINST SAID SECOND SUPPORT MEANS ON THE SIDE THEREFORE OPPOSITE SAID ROTOR WALL AND SPACED FROM SAID FIRST MEMBRANES TO LEAVE A PASSAGE THEREBETWEEN EXTENDING FROM ADJACENT THE CENTER OF SAID CAVITY TO THE PERIPHERY THEREOF; MEANS IN SAID ROTOR FOR CONDUCTING GAS INTO SAID STATOR, THROUGH SAID FIRST SUPPORT MEANS AND OUT OF SAID STATOR; MEANS IN SAID ROTOR FOR CONDUCTING GAS INTO SAID ROTOR, THROUGH SAID SECOND SUPPORT MEANS AND OUT OF SAID ROTOR; INLET MEANS IN SAID STATOR FOR CONDUCTING LIQUID INTO SAID CAVITY AND INTO SAID PASSAGE ADJACENT THE CENTER OF SAID ROTOR; AND OUTLET MEANS IN SAID PERIPHERAL WALL FOR CONDUCTING LIQUID OUT OF SAID CAVITY.
Claim 3
Dependent Claim
36 words
An oxygenator as in claim 1 including an irregularity on said second membranes effective to produce pumping of said liQuid from said inlet means to said outlet means upon rotation of said rotor in said stator.
Claim 4
Dependent Claim
14 words
An oxygenator as in claim 2 in which said irregularity is a radial vane.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |