US3791769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic heart pump
Assignee: Individual
•
Filing: 1970-06-04
•
Granted: 1974-02-12
•
Expires: 1990-06-04
Abstract
Abstract A magnetically driven heart pump wherein relative movement between opposing magnetic fields induce pump piston motion, which simulates the pulsatile pumping action of a natural heart. The heart pump has two separate parts. The first part comprises the pumping and valve chambers, and is adapted to be imbedded within the chest cavity. The second part, adapted to be strapped to the exterior of the chest wall, carries the magnet and mechanical linkage. The motion of the exterior magnet induces pump piston motion within the pumping chamber.
Inventors
- 👤 S Kovacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:08
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/042; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/117; A61M60/40; A61M60/424; A61M60/457; A61M60/459; A61M60/462; A61M60/80; A61M60/855; A61M60/89; A61M60/894; F04B53/00; F04B53/10; F04B53/102; F04B53/1022; A61M60/20; A61M60/247; A61M60/253; A61M60/258
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
335 words
A device for pumping fluids comprising a pumping chamber having a magnetically responsive first piston disposed therein, said first piston having a first and second position, a first pressure responsive free floating shuttle valve having a first and second position, said first pressure responsive free floating shuttle valve communicating with said chamber such that when the ambient is greater that the internal pressure of said pumping chamber said first shuttle valve is in first position allowing fluid to flow into said chamber and when said internal pressure is greater than said ambient pressure said first pressure responsive free floating shuttle valve is in said second position to seal said pumping chamber, a second pressure responsive free floating shuttle valve with said chamber, said second pressure responsive free floating shuttle valve having a first and second position, said second pressure shuttle valve being in said first position when the ambient pressure is greater than the internal pressure of said pumping chamber to seal said chamber and in said second position when the ambient pressure is less than the internal pressure of said pumping chamber to allow fluid to flow from said chamber, means to generate a magnetic field, said magnetic field generating means arranged relative to said first piston to generate a variable magnetic field thereon, said magnetic field generator means and said first piston being mechanically free to move said first piston from said first position to said second position to generate a pressure change within said pumping chamber, piston return means to return said piston to said first position to cause said pressure within said pumping chamber to vary first above and then below said ambient pressure whereby fluid within said pumping chamber is caused to flow respectively out of and into said pumping chamber through said first and second valves to substantially exhaust fluid from said chamber, said axis of translation of said first piston, first pressure responsive free floating shuttle valve and said second pressure responsive free floating shuttle valve being parallel.
Claim 2
Independent Claim
335 words
A device for pumping fluids comprising a pumping chamber having a magnetically responsive first piston disposed therein, said first piston having a first and second position, a first pressure responsive free floating shuttle valve having a first and second position, said first pressure responsive free floating shuttle valve communicating with said chamber such that when the ambient is greater that the internal pressure of said pumping chamber said first shuttle valve is in first position allowing fluid to flow into said chamber and when said internal pressure is greater than said ambient pressure said first pressure responsive free floating shuttle valve is in said second position to seal said pumping chamber, a second pressure responsive free floating shuttle valve with said chamber, said second pressure responsive free floating shuttle valve having a first and second position, said second pressure shuttle valve being in said first position when the ambient pressure is greater than the internal pressure of said pumping chamber to seal said chamber and in said second position when the ambient pressure is less than the internal pressure of said pumping chamber to allow fluid to flow from said chamber, means to generate a magnetic field, said magnetic field generating means arranged relative to said first piston to generate a variable magnetic field thereon, said magnetic field generator means and said first piston being mechanically free to move said first piston from said first position to said second position to generate a pressure change within said pumping chamber, piston return means to return said piston to said first position to cause said pressure within said pumping chamber to vary first above and then below said ambient pressure whereby fluid within said pumping chamber is caused to flow respectively out of and into said pumping chamber through said first and second valves to substantially exhaust fluid from said chamber, said axis of translation of said first piston, first pressure responsive free floating shuttle valve and said second pressure responsive free floating shuttle valve being parallel.
Claim 3
Dependent Claim
46 words
The device of claim 1 wherein variable magnetic field means comprises a magnet external to said pumping chamber, mechanical reciprocating means adapted to move said second magnet alternatively from a remote to a proximate and return to a remote location from said magnetically responsive first piston.
Claim 4
Dependent Claim
64 words
The device of claim 2 wherein said mechanical reciprocating means comprise a cam rotating means to rotate a cam, a cam riser arm attached to one end of a pivoted throw arm and pivotally connected at the distal end to said magnet, said mechanical rEciprocating means operatively secured to frame means which are adapted to be portably secured to the chest of the user.
Claim 5
Dependent Claim
14 words
The device of claim 1 wherein said piston return means comprise a non-reactive spring.
Claim 6
Dependent Claim
18 words
The device of claim 2 wherein said magnetically responsive piston is axially aligned and coextensive with said magnet.
Claim 7
Dependent Claim
14 words
The device of claim 5 wherein said magnetically responsive piston is a permanent magnet.
Claim 8
Dependent Claim
19 words
The device of claim 1 wherein said pump chamber and valves are constructed of lightweight, durable, non-reactive plastic material.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |