Patent US3604016A successfully refreshed from Google Patents.
US3604016A
Expired / Lapsed
US
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Multiple function blood coupler
Assignee: Thermo Fisher Scientific Inc
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Filing: 1969-02-06
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Granted: 1971-09-14
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Expires: 1989-02-06
Abstract
Abstract An integrated blood coupler for a totally implantable heartassist circulatory support system incorporating a diaphragm-type blood pump adapted to be connected between the left ventricle and aorta of the host, in which the pumping energy for the assist pump is produced by an implantable power supply that inherently produces waste heat as a byproduct, wherein the waste heat is discharged to the blood stream through the diaphragm of the blood pump, and in which the diaphragm serves as the physiological sensor for producing pressure signals to synchronize the assist system with the circulatory system of the host.
Inventors
- 👤 Thomas C Robinson
- 👤 Fred N Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:19
CPC Classifications
F; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F01L25/066; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/148; A61M60/165; A61M60/178; A61M60/40; A61M60/424; A61M60/427; A61M60/435; A61M60/438; A61M60/441; A61M60/50; A61M60/508; A61M60/538; A61M60/554; A61M60/80; A61M60/855; A61M60/861; A61M60/89; A61M60/894; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B43/107; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/107; A61M60/20; A61M60/247; A61M60/253; A61M60/268
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
310 words
A blood coupler for a heart-assist circulatory support system comprising power supply means for producing from a supply of hydraulic pumping fluid at a first temperature and a first pressure a supply of hydraulic fluid at a second higher temperature and a second higher pressure, a blood pump comprising a thin resilient expansible bladder sealed in a housing between openings adapted to be connected in a blood circulation system, said openings being provided with check valves to produce a pulsing unidirectional flow of blood through said bladder when hydraulic fluid is forced in and out of said housing outside of said bladder, and fluid exchange means connected between said housing and said power supply by a supply line containing pumping fluid at said first temperature and pressure and a return line containing pumping fluid at said second temperature and pressure, said fluid exchange means comprising an inlet chamber, an outlet chamber, a communicating passage between said inlet chamber and said outlet chamber, and thermally conductive piston means movable in said communicating passage to vary the volume of said inlet chamber with respect to the volume of said outlet chamber, means connecting said outlet chamber to said housing to exchange hydraulic fluid with said pump, means responsive to a drop in pressure in said bladder for connecting said supply line to said inlet chamber to admit a slug of fluid to said inlet chamber, thereby moving said piston means to drive fluid into said pump to compress said bladder while cooling the fluid in the inlet chamber and heating the fluid in the outlet chamber, while cooling the fluid in the housing and heating blood in the bladder, and means responsive to the volume of said outlet chamber for connecting said inlet chamber to said return line and disconnecting said supply line when said outlet chamber reaches a predetermined minimum volume.
Claim 2
Dependent Claim
310 words
A blood coupler for a heart-assist circulatory support system comprising power supply means for producing from a supply of hydraulic pumping fluid at a first temperature and a first pressure a supply of hydraulic fluid at a second higher temperature and a second higher pressure, a blood pump comprising a thin resilient expansible bladder sealed in a housing between openings adapted to be connected in a blood circulation system, said openings being provided with check valves to produce a pulsing unidirectional flow of blood through said bladder when hydraulic fluid is forced in and out of said housing outside of said bladder, and fluid exchange means connected between said housing and said power supply by a supply line containing pumping fluid at said first temperature and pressure and a return line containing pumping fluid at said second temperature and pressure, said fluid exchange means comprising an inlet chamber, an outlet chamber, a communicating passage between said inlet chamber and said outlet chamber, and thermally conductive piston means movable in said communicating passage to vary the volume of said inlet chamber with respect to the volume of said outlet chamber, means connecting said outlet chamber to said housing to exchange hydraulic fluid with said pump, means responsive to a drop in pressure in said bladder for connecting said supply line to said inlet chamber to admit a slug of fluid to said inlet chamber, thereby moving said piston means to drive fluid into said pump to compress said bladder while cooling the fluid in the inlet chamber and heating the fluid in the outlet chamber, while cooling the fluid in the housing and heating blood in the bladder, and means responsive to the volume of said outlet chamber for connecting said inlet chamber to said return line and disconnecting said supply line when said outlet chamber reaches a predetermined minimum volume.
Claim 3
Dependent Claim
49 words
The apparatus of claim 1, in which said means connecting said outlet chamber to said housing comprises an expansible chamber forming a closed and sealed container of constant volume with the space in said housing and outside of said bladder, said constaNt volume container being filled with hydraulic fluid.
Claim 4
Dependent Claim
173 words
A blood coupler for a heart-assist circulatory support system, comprising an implantable blood pump comprising a housing, a thin resilient bladder mounted in said housing and having a pair of openings adapted to be connected for unidirectional blood flow in a mammalian circulatory system, power supply means for producing from a supply of fluid at a predetermined low temperature and pressure a supply of fluid at high temperature and pressure, and fluid motor means connected to said housing by a fluid exchange passage and connected to said power supply by a supply line of fluid at said high temperature and pressure and a return line of fluid at said low temperature and pressure, said fluid motor means comprising means energized by the difference in pressure between said supply and return lines to supply pumping fluid at one temperature and pressure to said housing to compress said bladder and transfer heat through said bladder to blood in said bladder and to return cooled fluid at said low temperature and pressure to said return line.
Claim 5
Dependent Claim
173 words
A blood coupler for a heart-assist circulatory support system, comprising an implantable blood pump comprising a housing, a thin resilient bladder mounted in said housing and having a pair of openings adapted to be connected for unidirectional blood flow in a mammalian circulatory system, power supply means for producing from a supply of fluid at a predetermined low temperature and pressure a supply of fluid at high temperature and pressure, and fluid motor means connected to said housing by a fluid exchange passage and connected to said power supply by a supply line of fluid at said high temperature and pressure and a return line of fluid at said low temperature and pressure, said fluid motor means comprising means energized by the difference in pressure between said supply and return lines to supply pumping fluid at one temperature and pressure to said housing to compress said bladder and transfer heat through said bladder to blood in said bladder and to return cooled fluid at said low temperature and pressure to said return line.
Claim 6
Dependent Claim
47 words
The blood coupler of claim 3, in which said fluid exchange passage comprises an expansible chamber connected to and forming with the space in said housing outside of said bladder a sealed container of constant volume, and a fixed charge of hydraulic fluid filling said sealed container.
References Cited (Backward Citations)
US3379191A
Cited
US3434162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |