US4656004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical heat exchange
Assignee: Cobe Cardiovascular Inc
•
Filing: 1985-05-17
•
Granted: 1987-04-07
•
Expires: 2005-05-17
Abstract
Abstract A medical device with a heat exchanger portion comprising a coiled, corrugated, flattened tube located in a flowpath provided between coaxial cylindrical walls, the tube having a cross sectional configuration including a length smaller in a first direction perpendicular to the axis of the inner and outer walls than in a second direction perpendicular to the first direction.
Inventors
- 👤 Rodger L. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:08
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/08; A; A61; A61M; A61M5/00; A61M5/44; F28D; F28D7/00; F28D7/02; F28D7/024; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; A61M2205/00; A61M2205/36; A61M2205/366; Y; Y10; Y10S; Y10S128/00; Y10S128/03
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
113 words
A heat exchanger comprising a housing having a continuous outer housing wall, a coaxial continuous inner housing wall having the same shape as said outer housing wall and spaced inward of said outer housing wall to define a constant width axial flowpath chamber therebetween, and a conduit wrapped around said inner housing wall in said flowpath chamber between said outer housing wall and said inner housing wall, said conduit having a cross sectional configuration including a length smaller in a first direction transverse to said inner and outer walls than in a second longitudinal direction relative to said inner and outer walls, said conduit including corrugations extending generally in said axial flowpath direction.
Claim 2
Dependent Claim
113 words
A heat exchanger comprising a housing having a continuous outer housing wall, a coaxial continuous inner housing wall having the same shape as said outer housing wall and spaced inward of said outer housing wall to define a constant width axial flowpath chamber therebetween, and a conduit wrapped around said inner housing wall in said flowpath chamber between said outer housing wall and said inner housing wall, said conduit having a cross sectional configuration including a length smaller in a first direction transverse to said inner and outer walls than in a second longitudinal direction relative to said inner and outer walls, said conduit including corrugations extending generally in said axial flowpath direction.
Claim 3
Dependent Claim
29 words
The heat exchanger of claim 1 in which said corrugations have a configuration such that they have generally flat surfaces at portions adjacent to said inner and outer walls.
Claim 4
Dependent Claim
22 words
The heat exchanger of claim 2 in which said conduit is tubing flattened to produce both said cross sectional and corrugations configurations.
Claim 5
Dependent Claim
124 words
In oxygenation apparatus comprising an oxygenator and a heat exchanger having a housing having a continuous outer housing wall, a coaxial continuous inner housing wall having the same shape as said outer housing wall and spaced inward of said outer housing wall to define a constant width axial flowpath chamber therebetween, and a conduit wrapped around said inner housing wall in said flowpath chamber between said outer housing wall and said inner housing wall, said conduit including corrugations extending generally in said axial flowpath direction, wherein the improvement comprises said conduit having a cross sectional configuration including a length smaller in a first direction transverse to said inner and outer walls than in a second longitudinal direction relative to said inner and outer walls.
Claim 6
Dependent Claim
124 words
In oxygenation apparatus comprising an oxygenator and a heat exchanger having a housing having a continuous outer housing wall, a coaxial continuous inner housing wall having the same shape as said outer housing wall and spaced inward of said outer housing wall to define a constant width axial flowpath chamber therebetween, and a conduit wrapped around said inner housing wall in said flowpath chamber between said outer housing wall and said inner housing wall, said conduit including corrugations extending generally in said axial flowpath direction, wherein the improvement comprises said conduit having a cross sectional configuration including a length smaller in a first direction transverse to said inner and outer walls than in a second longitudinal direction relative to said inner and outer walls.
References Cited (Backward Citations)
US4282180A
Cited
US4065264A
Cited
US4138288A
Cited
US4187180A
Cited
US4160801A
Cited
US4440723A
Cited
US4424190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |