Patent US3898701A successfully refreshed from Google Patents.
US3898701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable heart valve
Assignee: RUSSA JOSEPH
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Filing: 1974-01-17
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Granted: 1975-08-12
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Expires: 1994-01-17
Abstract
Abstract An implantable heart valve is disclosed and includes a flattened, flexible tubular body preferably made of silicone rubber, an annular spacing member inserted into and opening the upstream end of the tubular body, the downstream end of the body forming a flap valve with inner working surfaces that contact each other when the valve is closed and move apart when the valve is opened, and an anti-inversion separator carried by the annular spacing member and extending into the tubular body and between the working surfaces thereof such that a portion of the working surfaces contact the anti-inversion separator when the valve is closed. Additional embodiments include a suturing sleeve attached to the upstream end of the tubular body and a stiff shroud surrounding the tubular body and attached thereto at the upstream end.
Inventors
- 👤 Russa Joseph La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:36
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1472; A61F2/2442; A61F2/2454; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
Heart valve comprising: a. a flattened, flexible tubular body; b. spacing means inserted into and opening the upstream end of said tubular body, the downstream end of said tubular body forming a flap valve with inner working surfaces that contact each other when the valve is closed and move apart when the valve is open; c. a centrally positioned, flat, tongue-like anti-inversion member carried by said spacing means and extending into the tubular body between the working surfaces thereof, a portion of said working surfaces contacting said anti-inversion member when the valve is closed and the remaining portion of said working surfaces contacting each other around said antiinversion member when the valve is closed; and d. an annular mesh sleeve embedded in the upstream end of said tubular body for suturing the valve to the heart tissue.
Claim 2
Dependent Claim
137 words
Heart valve comprising: a. a flattened, flexible tubular body; b. spacing means inserted into and opening the upstream end of said tubular body, the downstream end of said tubular body forming a flap valve with inner working surfaces that contact each other when the valve is closed and move apart when the valve is open; c. a centrally positioned, flat, tongue-like anti-inversion member carried by said spacing means and extending into the tubular body between the working surfaces thereof, a portion of said working surfaces contacting said anti-inversion member when the valve is closed and the remaining portion of said working surfaces contacting each other around said antiinversion member when the valve is closed; and d. an annular mesh sleeve embedded in the upstream end of said tubular body for suturing the valve to the heart tissue.
Claim 3
Dependent Claim
24 words
Heart valve of claim 1 wherein said spacing means is an annular member inserted into and opening the upstream end of said tubular body.
Claim 4
Dependent Claim
20 words
Heart valve of claim 1 wherein said tongue-like member decreases in width towards the downstream end of said tubular body.
Claim 5
Dependent Claim
19 words
Heart valve of claim 1 wherein said tongue-like member terminates short of the downstream end of said tubular body.
Claim 6
Dependent Claim
23 words
Heart valve of claim 1 provided with a relatively stiff, tubular shroud surrounding said tubular body and attached thereto at the upstream end.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |