US5895421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial heart
Assignee: Individual
•
Filing: 1997-07-28
•
Granted: 1999-04-20
•
Expires: 2017-07-28
Abstract
Abstract An artificial heart comprising a case with inlet and outlet openings for blood which can be implanted in human body instead of an incurable human heart and can provide the normal blood flows in both large (body) and small (lungs) blood circulations for a long period (years). It has a driving arrangement which has a driver armed with magnets and is placed outside the human body. The case is formed with cylindrical wall and two end plates and contains a movable grid consisting of twelve elongated wall elements which are disposed between said plates and which bear slidingly and sealingly on said plates, each wall element being articulately sealingly connected at its end points to at least one further wall element. The grid has nine axles; the central one is connected at least with one of the said plates, the remaining axles are free. The grid is armed with permanent magnets which cause the grid's rotation by their magnet coupling with the driving magnets of the driver. The grid has four cells and together with the end plates forms four operating chambers which alternate their volumes during rotation of grid and work as pump chambers for blood.
Inventors
- 👤 Raoul S. Nakhmanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:45
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0057; F04C15/0061; F04C15/0069; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/196; A61M60/40; A61M60/424; A61M60/457; A61M60/462; F04C2/00; F04C2/30; F04C2/40; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
An artificial heart comprising four operating chambers with variable volume which are disposed in a case having at least one inlet opening and at least one outlet opening for blood which is adapted to be implanted in a human body and built through two end plates connected with a cylindrical wall, and a movable grid within the said case, which consists of twelve elongated wall elements, which bear slidingly and sealingly on one of said two end plates, each elongated wall element being articulately sealingly connected at its end points to at least one further of said elongated wall elements, and a driver which is adapted to be placed outside the human body and is equipped with permanent magnets, characterized in that the said elongated wall elements bear slidingly and sealingly on a second one of said two end plates too, to build the operating chambers, and the said movable grid is equipped with permanent magnets to cooperate with the permanent magnets of the said driver.
Claim 2
Dependent Claim
166 words
An artificial heart comprising four operating chambers with variable volume which are disposed in a case having at least one inlet opening and at least one outlet opening for blood which is adapted to be implanted in a human body and built through two end plates connected with a cylindrical wall, and a movable grid within the said case, which consists of twelve elongated wall elements, which bear slidingly and sealingly on one of said two end plates, each elongated wall element being articulately sealingly connected at its end points to at least one further of said elongated wall elements, and a driver which is adapted to be placed outside the human body and is equipped with permanent magnets, characterized in that the said elongated wall elements bear slidingly and sealingly on a second one of said two end plates too, to build the operating chambers, and the said movable grid is equipped with permanent magnets to cooperate with the permanent magnets of the said driver.
Claim 3
Dependent Claim
23 words
An artificial heart according to claim 1, characterized in that the driver is a rotating plate which is equipped with said driver magnets.
Claim 4
Dependent Claim
33 words
An artificial heart according to claim 1, characterized in that the driver is a movable grid which is similar to the grid contained in the case and is equipped with said driver magnets.
Claim 5
Dependent Claim
40 words
An artificial heart according to claim 1, characterized in that at least in one of the end plates of the case there is a cavity which in corresponding phases of rotation communicates with at least one of the operating chambers.
Claim 6
Dependent Claim
202 words
An artificial heart, comprising in combination: a) a casing having substantially parallel, opposite coextensive walls, and having a side wall joining said opposite, coextensive walls, b) said walls having blood inlet and blood outlet openings, c) an articulated grid disposed within said casing and adapted to move therein, said grid comprising a multiplicity of articulated wall elements which are joined to produce a multiplicity of variable-volume pump chambers in said casing, some of said chambers being selectively in communication with either an inlet opening or an outlet opening, d) said wall elements having opposite end portions which slidingly and directly engage, respectively, said opposite, coextensive walls as said grid is moved within the casing, whereby the spacing between the opposite coextensive walls can be kept to a minimum, e) said grid having a magnet carried at a joint between one pair of said articulated wall elements, and f) rotating magnetic drive means disposed exteriorly of said casing, magnetically coupled with the magnet of said grid through one of the parallel coextensive walls, thereby to drive the grid transversely in the casing and vary the volume of the pump chambers, forcing blood to flow between the inlet and outlet openings of the casing.
Claim 7
Dependent Claim
202 words
An artificial heart, comprising in combination: a) a casing having substantially parallel, opposite coextensive walls, and having a side wall joining said opposite, coextensive walls, b) said walls having blood inlet and blood outlet openings, c) an articulated grid disposed within said casing and adapted to move therein, said grid comprising a multiplicity of articulated wall elements which are joined to produce a multiplicity of variable-volume pump chambers in said casing, some of said chambers being selectively in communication with either an inlet opening or an outlet opening, d) said wall elements having opposite end portions which slidingly and directly engage, respectively, said opposite, coextensive walls as said grid is moved within the casing, whereby the spacing between the opposite coextensive walls can be kept to a minimum, e) said grid having a magnet carried at a joint between one pair of said articulated wall elements, and f) rotating magnetic drive means disposed exteriorly of said casing, magnetically coupled with the magnet of said grid through one of the parallel coextensive walls, thereby to drive the grid transversely in the casing and vary the volume of the pump chambers, forcing blood to flow between the inlet and outlet openings of the casing.
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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) | 2002-04-19 | 2002-10-19 | 2003-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-19 | 2006-10-19 | 2007-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-19 | 2010-10-19 | 2011-04-20 | $7700.00 | Window Closed / Lapsed |