Patent US3918912A successfully refreshed from Google Patents.
US3918912A
Expired / Lapsed
US
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Blood oxygenator
Assignee: Sherwood Medical Co
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Filing: 1973-10-15
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Granted: 1975-11-11
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Expires: 1993-10-15
Abstract
Abstract A blood oxygenator is provided with a preformed defoaming member of open-cell sponge material of synthetic plastic disposed in the defoaming chamber in series between the oxygenating chamber and the blood reservoir chamber of the oxygenator. Spaces are provided between the defoaming member and the upper and lower walls of the defoaming chamber to produce a reduced resistance to the flow of gas and blood. A fine mesh filter and funnel are connected to the defoaming chamber to gently transfer and filter blood flowing to the reservoir.
Inventors
- 👤 Daniel A Talonn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:15
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/32; A61M1/322; A61M1/325; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
210 words
A BLOOD OXYGENATOR COMPRISING AN OXYGENATING CHAMBER, MEANS FOR DELIVERING VENOUS BLOOD AND OXYBENATING GAS TO SAID OXYGENATING CHAMBER FOR PRODUCING FOAMED BLOOD IN SAID OXYGENATING CHAMBER TO OXYGENATE THE BLOOD, A RESERVOIR FOR RECEIVING OXYGENATED BLOOD AND HAVING AN OUT LET FOR DISCHARGING OXYGENATED BLOOD, SAID RESERVOIR BEING NORMALLY FILLED WITH BLOOD TO AN OPERATING BLOOD LEVEL, INDICIA MEANS INCLUDING A VISUAL MARK IN FIXED RELATION TO SAID CHAMBER PROVICING A VISUAL INDICATION OF SAID OPERATING BLOOD LEVEL, DEFOAMING MEANS INCLUDING A DEFOAMING CHAMBER CONNECTED BETWEEN SAID OXYGENERATING CHAMBER AND SAID RESERVOIR, AND A DEFOAMING MEMBER IN SAID DEFOAMING CHAMBER FOR REMOVING GAS FROM SAID FOAMED BLOOD, A FUNNEL MEMBER CONNECTED TO THE DOWNSTREAM END OF SAID DEFOAMING CHAMBER AND INCLINED DOWNWARDLY TOWARD SAID RESERVOIR WITH THE LOWER END THEREOF DISPOSED BELOW SAID INDICIA MEANS TO GENTLY TRANSFER BLOOD FROM SAID DEFOAMING CHAMBER TO SAID RESERVOIR, SAID FUNNEL MEMBER BEING DISPOSED TO RECEIVE AND PASS ALL OF THE BLOOD FLOWING FROM SAID DEFOAMING A MEANS TO SAID RESERVOIR AND SAID OUTLET, AND A FILTER MEMBER EXTENDING BELOW SAID LOWER END OF SAID FUNNEL AND SAID INDICEA MEANS SO THAT ALL OF THE BLOOD FLOWING FROM SAID FUNNEL MEMBER TO SAID RESERVOIR AD SAID OUTLET FLOWS THROUGH SAID FILTER MEMBER.
Claim 2
Dependent Claim
210 words
A BLOOD OXYGENATOR COMPRISING AN OXYGENATING CHAMBER, MEANS FOR DELIVERING VENOUS BLOOD AND OXYBENATING GAS TO SAID OXYGENATING CHAMBER FOR PRODUCING FOAMED BLOOD IN SAID OXYGENATING CHAMBER TO OXYGENATE THE BLOOD, A RESERVOIR FOR RECEIVING OXYGENATED BLOOD AND HAVING AN OUT LET FOR DISCHARGING OXYGENATED BLOOD, SAID RESERVOIR BEING NORMALLY FILLED WITH BLOOD TO AN OPERATING BLOOD LEVEL, INDICIA MEANS INCLUDING A VISUAL MARK IN FIXED RELATION TO SAID CHAMBER PROVICING A VISUAL INDICATION OF SAID OPERATING BLOOD LEVEL, DEFOAMING MEANS INCLUDING A DEFOAMING CHAMBER CONNECTED BETWEEN SAID OXYGENERATING CHAMBER AND SAID RESERVOIR, AND A DEFOAMING MEMBER IN SAID DEFOAMING CHAMBER FOR REMOVING GAS FROM SAID FOAMED BLOOD, A FUNNEL MEMBER CONNECTED TO THE DOWNSTREAM END OF SAID DEFOAMING CHAMBER AND INCLINED DOWNWARDLY TOWARD SAID RESERVOIR WITH THE LOWER END THEREOF DISPOSED BELOW SAID INDICIA MEANS TO GENTLY TRANSFER BLOOD FROM SAID DEFOAMING CHAMBER TO SAID RESERVOIR, SAID FUNNEL MEMBER BEING DISPOSED TO RECEIVE AND PASS ALL OF THE BLOOD FLOWING FROM SAID DEFOAMING A MEANS TO SAID RESERVOIR AND SAID OUTLET, AND A FILTER MEMBER EXTENDING BELOW SAID LOWER END OF SAID FUNNEL AND SAID INDICEA MEANS SO THAT ALL OF THE BLOOD FLOWING FROM SAID FUNNEL MEMBER TO SAID RESERVOIR AD SAID OUTLET FLOWS THROUGH SAID FILTER MEMBER.
Claim 3
Dependent Claim
19 words
The blood oxygenator of claim 1 wherein said funnel member extends beyond the lowermost end of said defoaming means.
Claim 4
Dependent Claim
34 words
The blood oxygenator of claim 1 wherein said funnel and filter members each has opposed side wall with the side walls of said funnel member disposed between the side walls of said filter member.
Claim 5
Dependent Claim
30 words
The blood oxygenator of cLaim 1 wherein said reservoir has opposed side walls, and the lower end of said funnel member is spaced from the side walls of said reservoir.
Claim 6
Dependent Claim
30 words
The blood oxygenator of claim 4 wherein said filter member comprises a pocket of fine mesh filtering material, and said funnel member is disposed in and surrounded by said pocket.
Claim 7
Dependent Claim
18 words
The blood oxygenator of claim 5 wherein said funnel member and said filtering material are of synthetic plastic.
Claim 8
Dependent Claim
30 words
The oxygenator of claim 5 wherein said funnel member is a unitary sheet folded to provide a seamless bottom wall for transfering blood from said defoaming chamber to said reservoir.
Claim 9
Dependent Claim
93 words
The oxygenator of claim 7 further including a pair of synthetic plastic sheet members predeterminately heat sealed along a seam to define said defoaming chamber and said reservoir, and wherein said filter member is open only at the upper end thereof, said funnel member has an upper open end heat sealed to said upper end of said filter member to provide a funnel and filter assembly open at the upper end, and said upper end of said assembly is heat sealed to said sheet members at the lower end of said defoaming chamber.
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |