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Patent US4536893A successfully refreshed from Google Patents.
US4536893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implant device for substaining the activity of the myocardium
Assignee: Individual
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Filing: 1984-11-07
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Granted: 1985-08-27
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Expires: 2004-11-07
Abstract
Abstract The device comprises a container housing for enveloping, at least partially, the ventricular region of the myocardium. To the inner surface of the container housing are applied membrane means which define pumping chambers between the inner surface and the myocardial wall. A pumping fluid is fed selectively to these chambers to cause expansion of the chambers and consequent compression of the myocardial wall.
Inventors
- 👤 Roberto Parravicini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:48
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; A61M60/465; A61M60/468; A61M60/50; A61M60/585; A61M60/80; A61M60/839; A61M60/855; A61M60/861
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
An implant device for sustaining the activity of the myocardium comprising: a container housing including two substantially separate rigid shells adapted to envelop the left ventricular wall and the right ventricular wall of the myocardium, respectively, and a biocompatible fabric connecting strip bridging a space formed between said shells between said shells and securely attached to said shells wherein said fabric extends in said space between said shells in correspondence with the interventricular sulcus for attachment thereto by suturing, membrane means secured to the inner surface of said shells defining two separate independent pumping chambers each adapted to act independently on the left ventricular wall and the right ventricular wall of the myocardium, respectively, and means for selectively and separately feeding fluid to said two chambers so as to cause expansion of the chambers and consequent compression of the left ventricular wall and the right ventricular wall of the myocardium.
Claim 2
Dependent Claim
150 words
An implant device for sustaining the activity of the myocardium comprising: a container housing including two substantially separate rigid shells adapted to envelop the left ventricular wall and the right ventricular wall of the myocardium, respectively, and a biocompatible fabric connecting strip bridging a space formed between said shells between said shells and securely attached to said shells wherein said fabric extends in said space between said shells in correspondence with the interventricular sulcus for attachment thereto by suturing, membrane means secured to the inner surface of said shells defining two separate independent pumping chambers each adapted to act independently on the left ventricular wall and the right ventricular wall of the myocardium, respectively, and means for selectively and separately feeding fluid to said two chambers so as to cause expansion of the chambers and consequent compression of the left ventricular wall and the right ventricular wall of the myocardium.
Claim 3
Dependent Claim
23 words
An implant device as set forth in claim 1 wherein said membrane means is comprised of a sac-like envelope having a double wall.
Claim 4
Dependent Claim
28 words
An implant device as defined in claim 1 further comprising feed tube means connected to said pumping chambers and a transcutaneous connector connected to said feed tube means.
Claim 5
Dependent Claim
40 words
An implant device as defined in claim 1 wherein said biocompatible connecting strip fabric extends about the upper edges of said shells to define a collar adapted to extend in correspondence with the atrioventricular sulcus for attachment thereto by suturing.
Claim 6
Dependent Claim
28 words
An implant device as set forth in claim 4 wherein strap means extend from said collar for wrapping around the roots of blood vessels converging on the myocardium.
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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |