US4192293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cardiac assist device
Assignee: Individual
•
Filing: 1978-09-05
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Granted: 1980-03-11
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Expires: 1998-09-05
Abstract
Abstract A cardiac assist device which operates by cyclically exerting pressure through an implanted inflatable sheath, which surrounds the myocardium. The sheath is rigid and encloses a bladder or plurality of bladders into which a fluid, either in the form of an inert gas or a liquid is pulsed, with a time displacement curve similar or identical to the contraction-distension characteristics exhibited normally by the myocardium during a cardiac cycle. Pulsing is triggered by the EKG R-spike of the patient which operates a valve. In order to provide adequate fluid volume for the required pressure through the valve, an elastic fluid reservoir is provided.
Inventors
- 👤 Manfred Asrican
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:48
CPC Classifications
A; A61; A61M; A61M60/00; A61M60/40; A61M60/424; A61M60/427; A61M60/43; A61M60/10; A61M60/122; A61M60/165; A61M60/191; A61M60/20; A61M60/289; A61M60/435; A61M60/465; A61M60/468; A61M60/80; A61M60/839; A61M60/855; A61M60/871; A61M60/882
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
An improved cardiac assist device comprising: a hollow rigid sheath of generally frusto-conical configuration adapted to be surgically implanted to surround the myocardium of a patient; an inflatable bladder mounted upon the inner surface of said sheath, and having means for input and return flow of a pressurized fluid from an external source; a reciprocating pump adapted to be worn by said patient, and driven by respitation movement of the diaphragm of said patient; an elastic reservoir connected in series with said pump, a valve in series with said reservoir and communicating with said bladder; means sensing the heartbeat of said patient and providing a signal controlling said valve in synchronism therewith; and conduit means for returning fluid from said bladder to said pump.
Claim 2
Dependent Claim
124 words
An improved cardiac assist device comprising: a hollow rigid sheath of generally frusto-conical configuration adapted to be surgically implanted to surround the myocardium of a patient; an inflatable bladder mounted upon the inner surface of said sheath, and having means for input and return flow of a pressurized fluid from an external source; a reciprocating pump adapted to be worn by said patient, and driven by respitation movement of the diaphragm of said patient; an elastic reservoir connected in series with said pump, a valve in series with said reservoir and communicating with said bladder; means sensing the heartbeat of said patient and providing a signal controlling said valve in synchronism therewith; and conduit means for returning fluid from said bladder to said pump.
Claim 3
Dependent Claim
24 words
A device as set forth in claim 1, further comprising safety valve means for relieving excess fluid pressures in said reservoir to said pump.
Claim 4
Dependent Claim
23 words
A device as set forth in claim 1, further characterized in said pump having electrical generating means associated therewith for powering a pacemaker.
Claim 5
Dependent Claim
20 words
A device as set forth in claim 1, further characterized in said pump having means generating electromotive power connected thereto.
Claim 6
Dependent Claim
39 words
A device as set forth in claim 4, further characterized in said last mentioned means including a permanent magnet core and a coil surrounding said core; movement of said pump varying the relative position of said core and coil.
Claim 7
Dependent Claim
74 words
Improved means for generating electromotive power for use on the body of a wearer comprising: a reciprocating means adapted to be worn by a patient, and driven by respitation movement of the diaphragm of said patient, said reciprocating means including a permanent magnet core and a coil surrounding said core, movement of said reciprocating means serving to vary the relative position of said core and coil, to generate an electromotive force in said coil.
Claim 8
Dependent Claim
74 words
Improved means for generating electromotive power for use on the body of a wearer comprising: a reciprocating means adapted to be worn by a patient, and driven by respitation movement of the diaphragm of said patient, said reciprocating means including a permanent magnet core and a coil surrounding said core, movement of said reciprocating means serving to vary the relative position of said core and coil, to generate an electromotive force in said coil.
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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |