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US3668708A
Expired / Lapsed
US
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Artificial heart
Assignee: Boeing North American Inc
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Filing: 1969-12-23
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Granted: 1972-06-13
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Expires: 1989-12-23
Abstract
Abstract An artificial heart has a number of flat structural members arranged circumferentially about a central support. An inner layer of material confines blood to chambers of the artificial heart and an outer layer of material, which fully encloses the flat structural members, defines cavities between the inner layer of material and the outer layer. Fluid is pumped into the cavities for expanding the structural members to cause heart pumping action in response to measured values of preselected blood chemistry parameters. The structural members contact to their original positions to complete the pumping action.
Inventors
- 👤 James A Tindal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:06
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3607; A61M1/3609; A61M1/361; A61M60/00; A61M60/10; A61M60/122; A61M60/196; A61M60/20; A61M60/247; A61M60/253; A61M60/268; A61M60/40; A61M60/424; A61M60/427; A61M60/435; A61M60/50; A61M60/508; A61M60/515; A61M60/80; A61M60/855; A61M60/89; A61M60/892; A61M2205/00; A61M2205/33; A61M2205/3303; A61M60/126; A61M60/148; A61M60/894; A61M60/896
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
An artificial heart comprising a central support, resiliently flexible flat structural members disposed around said central support, an inner layer of flexible elastic material supported between said flexible flat structural members and said central support, said inner layer forming a first cavity for said artificial heart, said cavity being divided into a plurality of heart chambers, inlet and outlet valve means communicating with the chambers of said heart cavity, outer layer of flexible elastic material encapsulating the flexible flat structural members, connecting means between said inner and outer layers, a plurality of second cavities formed between said inner and outer layErs for selectively receiving and discharging a pressure imparting fluid for flexing said flat structural members outwardly and inwardly whereby blood is enabled to flow through said artificial heart via said valve means and heart cavity in response to outward and inward flexing of said outer layer
Claim 2
Dependent Claim
147 words
An artificial heart comprising a central support, resiliently flexible flat structural members disposed around said central support, an inner layer of flexible elastic material supported between said flexible flat structural members and said central support, said inner layer forming a first cavity for said artificial heart, said cavity being divided into a plurality of heart chambers, inlet and outlet valve means communicating with the chambers of said heart cavity, outer layer of flexible elastic material encapsulating the flexible flat structural members, connecting means between said inner and outer layers, a plurality of second cavities formed between said inner and outer layErs for selectively receiving and discharging a pressure imparting fluid for flexing said flat structural members outwardly and inwardly whereby blood is enabled to flow through said artificial heart via said valve means and heart cavity in response to outward and inward flexing of said outer layer
Claim 3
Dependent Claim
22 words
The artificial heart according to claim 1 wherein said flexible flat structural members comprise leaf springs arranged circumferentially about said central support.
Claim 4
Dependent Claim
31 words
The artificial heart of claim 1 wherein said outer layer is composed of strips of flexible, elastic material cross-laced perpendicularly and obliquely to each other and bonded to form a laminate.
Claim 5
Dependent Claim
47 words
The artificial heart recited in claim 1 including a plurality of first cavity partitioning means forming said chambers inside said heart cavity, and drive means for forcing fluid into a selected second cavity for applying pressure to said flexible flat structural members whereby aid chamber is expanded.
Claim 6
Dependent Claim
50 words
The artificial heart recited in claim 1 wherein said connecting means comprises a layer of material interconnecting said inner and outer layers of material for maintaining a spaced relationship between said inner and outer layers of material when fluid is received by said cavities between said inner and outer layers.
Claim 7
Dependent Claim
78 words
The artificial heart recited in claim 5 wherein said partition means form four chambers inside said first cavity and further comprising: first valve means for permitting the flow of blood into two of said four chambers; second valve means for permitting the flow of blood from said two of said four chambers into the remaining two of said four chambers, and third valve means for permitting the flow of blood from said remaining two of said four chambers.
Claim 8
Independent Claim
128 words
A device for simulating a natural heart comprising: inner and outer flexible elastic coverings substantially closed on themselves, said coverings defining a cavity therebetween, connecting means between said inner and outer coverings; at least two strips of resiliently flexible material attached to one of said coverings; prime mover means for causing a fluid to flow into said cavity between said inner and outer covering; partition means internal to and integral with said inner coverings, said partition means defining at least two cavities internal to said inner covering inlet and outlet valve means communicating with said internal cavities whereby blood can flow through said internal cavities; and sensing and control means for driving said prime mover means in a manner substantially similar to the rate of a natural heart.
Claim 9
Independent Claim
128 words
A device for simulating a natural heart comprising: inner and outer flexible elastic coverings substantially closed on themselves, said coverings defining a cavity therebetween, connecting means between said inner and outer coverings; at least two strips of resiliently flexible material attached to one of said coverings; prime mover means for causing a fluid to flow into said cavity between said inner and outer covering; partition means internal to and integral with said inner coverings, said partition means defining at least two cavities internal to said inner covering inlet and outlet valve means communicating with said internal cavities whereby blood can flow through said internal cavities; and sensing and control means for driving said prime mover means in a manner substantially similar to the rate of a natural heart.
Claim 10
Dependent Claim
24 words
The device according to claim 7 and further comprising power system means, said power system providing driving power to said sensing and control means.
References Cited (Backward Citations)
FR1504494A
Cited
US3464322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |