Patent US2237218A successfully refreshed from Google Patents.
US4493705A
Expired / Lapsed
US
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Blood reservoir
Assignee: Baxter International Inc
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Filing: 1982-08-10
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Granted: 1985-01-15
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Expires: 2002-08-10
Abstract
Abstract A yoke shaped collapsible blood reservoir having first and second yoke legs joined by a yoke midsection. A filter element is positioned in the yoke midsection and across the blood flow path between an inlet at the base of the first yoke leg and a blood outlet at the base of the second yoke leg. An angular blood inlet and a gradual increase in cross-sectional area from the blood inlet to the yoke midsection decreases turbulence and assists in bubble separation.
Inventors
- 👤 Lucas S. Gordon
- 👤 Jeanne Pierson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:33
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M5/00; A61M5/14; A61M5/165; A61M2205/00; A61M2205/75; A61M5/36; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
A blood reservoir comprising: a substantially inverted U shaped reservoir chamber having first and second U legs joined by a U midsection; a substantially cylindrical inlet at the base of said first U leg said inlet aligned such that its centerline projects upwardly from the centerline of said first U leg; an outlet at the base of said second U leg; and a vent at the uppermost portion of the U midsection.
Claim 2
Dependent Claim
72 words
A blood reservoir comprising: a substantially inverted U shaped reservoir chamber having first and second U legs joined by a U midsection; a substantially cylindrical inlet at the base of said first U leg said inlet aligned such that its centerline projects upwardly from the centerline of said first U leg; an outlet at the base of said second U leg; and a vent at the uppermost portion of the U midsection.
Claim 3
Dependent Claim
55 words
The blood reservoir claimed in claim 1 wherein said reservoir further includes a filter element at said U midsection and positioned across the blood flow path between said blood inlet and said blood outlet said filter element is more particularly defined as having a pore size of between about 100 microns to about 250 microns.
Claim 4
Dependent Claim
18 words
The blood reservoir in claim 1 wherein said substantially inverted U shaped reservoir chamber is made from plastic.
Claim 5
Dependent Claim
34 words
The blood reservoir claimed in claim 1 wherein the ratio of the height of the reservoir chamber to the height of the center of the U midsection is between about 1.7 and about 1.2.
Claim 6
Dependent Claim
106 words
A flexible collapsible blood reservoir comprising: a substantially U shaped reservoir chamber having first and second U legs joined by a U midsection wherein the ratio of the height of the reservoir chamber to the height of the center of the U midsection is between about 1.7 and about 1.2; a blood inlet at the base of said first U leg; a blood outlet at the base of said second U leg; a non-flexible filter element positioned at the U midsection and across the blood flow path between said blood inlet and said blood outlet; and a vent at the uppermost portion of the U midsection.
Claim 7
Dependent Claim
106 words
A flexible collapsible blood reservoir comprising: a substantially U shaped reservoir chamber having first and second U legs joined by a U midsection wherein the ratio of the height of the reservoir chamber to the height of the center of the U midsection is between about 1.7 and about 1.2; a blood inlet at the base of said first U leg; a blood outlet at the base of said second U leg; a non-flexible filter element positioned at the U midsection and across the blood flow path between said blood inlet and said blood outlet; and a vent at the uppermost portion of the U midsection.
Claim 8
Dependent Claim
28 words
The blood reservoir claimed in claim 5 wherein said filter element is more particularly defined as having the pore size between about 100 microns to about 250 microns.
Claim 9
Dependent Claim
21 words
The blood reservoir claimed in claim 5 wherein said substantially U shaped reservoir chamber is made from polyvinylchloride, polypropoleane or polyurethane.
Claim 10
Dependent Claim
76 words
A flexible collapsible blood reservoir comprising: a substantially U shaped reservoir chamber having first and second U legs joined by a U midsection, the cross-sectional area of said U being greatest at the U midsection and gradually decreasing toward each U leg base; a filter element positioned at the U midsection and across the blood flow path between said blood inlet and said blood outlet; and a vent at the uppermost portion of the U midsection.
Claim 11
Dependent Claim
76 words
A flexible collapsible blood reservoir comprising: a substantially U shaped reservoir chamber having first and second U legs joined by a U midsection, the cross-sectional area of said U being greatest at the U midsection and gradually decreasing toward each U leg base; a filter element positioned at the U midsection and across the blood flow path between said blood inlet and said blood outlet; and a vent at the uppermost portion of the U midsection.
Claim 12
Dependent Claim
29 words
The blood reservoir claimed in claim 8 wherein said filter element is more particularly defined as having a pore size of between about 100 microns to about 250 microns.
Claim 13
Dependent Claim
34 words
The blood reservoir claimed in claim 8 wherein the ratio of the height of the reservoir chamber to the height of the center of the U midsection is between about 1.7 and about 1.2.
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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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |