US3699957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vas prosthesis for reversible sterilization
Assignee: Tecna Corp
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Filing: 1970-10-01
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Granted: 1972-10-24
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Expires: 1990-10-01
Abstract
Abstract A prosthetic device for reversibly blocking semen flow through the vas deferens including a cannula for sealed coupling with severed portions of the vas and a reversible valve associated with the cannula having a closed position for blocking fluid flow and an open position for permitting fluid flow. Microcavities may be incorporated externally or internally on the surfaces of the cannula for compatibility with living tissue. The valve types include mechanical clamps or plugs and a hydraulically actuated expandible cuff.
Inventors
- 👤 Thomas C Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:34
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/20; A61F6/22; A61F6/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
A prosthetic device for reversibly blocking semen flow through the vas deferens comprising a cannula including surface portions at both extremities including a plurality of adjacent substantially discrete pockets with the walls of said pockets being of a shape and size for receiving living cells of said vas deferens for sealed firm coupling with severed portions of the vas deferens to provide a continuous fluid passageway therewith and form a semen seal and reversible valve means associated with said cannula having a closed position for blocking fluid flow and an open position for permitting flow.
Claim 2
Dependent Claim
95 words
A prosthetic device for reversibly blocking semen flow through the vas deferens comprising a cannula including surface portions at both extremities including a plurality of adjacent substantially discrete pockets with the walls of said pockets being of a shape and size for receiving living cells of said vas deferens for sealed firm coupling with severed portions of the vas deferens to provide a continuous fluid passageway therewith and form a semen seal and reversible valve means associated with said cannula having a closed position for blocking fluid flow and an open position for permitting flow.
Claim 3
Dependent Claim
24 words
A prosthetic device as in claim 1 in which the cannula extremities are essentially rigid and are adapted for insertion into the vas portions.
Claim 4
Dependent Claim
37 words
A prosthetic device as in claim 1 in which said cannula is formed of a flexible material and said reversible valve means includes a clamp which compresses portions of the cannula together in said closed valve position.
Claim 5
Dependent Claim
70 words
A prosthetic device as in claim 1 in which said reversible valve means includes a side arm in communication with the cannula passage and a plug means slidably received in fluid sealing engagement with said side arm, said plug means projecting into the cannula passage in fluid sealing engagement therewith in a closed valve position and retracting to unblock the cannula passageway but prevent leakage therefrom in open valve position.
Claim 6
Dependent Claim
54 words
A prosthetic device as in claim 1 in which said cannula if formed of flexible material and said reversible valve means comprises an inflatable cuff mounted about said cannula and hydraulic fluid flow means for expanding said cuff by filling the same with hydraulic fluid and for collapsing the cuff by withdrawing the fluid.
Claim 7
Dependent Claim
79 words
A prosthetic device as in claim 4 in which said hydraulic fluid flow means includes a hydraulic fluid reservoir, a fluid duct in communication with said fluid reservoir and cuff, and a fluid duct valve operably associated with said duct having an open position in which the hydraulic fluid is permitted to flow between said reservoir and said cuff for inflation or deflation of the same and a closed position in which passage of the hydraulic fluid is blocked.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |