US4364127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trileaflet type prosthetic heart valve
Assignee: RESEARCH Corp A NOT-FOR-PROFIT CORP OF NY
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Filing: 1981-10-02
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Granted: 1982-12-21
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Expires: 2001-10-02
Abstract
Abstract A prosthetic heart valve constructed of hemo-compatible materials that is anatomically and functionally similar to the natural aortic valve is disclosed which reduces or eliminates the occurrence of many of the complications found in the use of prior art prosthetic valves. The heart valve is a trileaflet type which has its formed leaflets heat set in a partially open position to reduce pressure required to open the leaflets in response to blood flowing therethrough.
Inventors
- 👤 William S. Pierce
- 👤 Craig B. Wisman
- 👤 James H. Donachy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2409; A61F2/2412; Y; Y10; Y10S; Y10S623/00; Y10S623/90; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7885; Y10T29/00; Y10T29/49; Y10T29/49405
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A prosthetic trileaflet type heart valve comprising: 1. a frame having a ring shaped base and three upstanding struts; said base further provided with a groove in its external surface to receive a thin fabric or the like suture element; 2. a one piece membrane formed on said frame to provide three leaflets of the valve; said formed leaflets being heat set in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
Claim 2
Dependent Claim
83 words
A prosthetic trileaflet type heart valve comprising: 1. a frame having a ring shaped base and three upstanding struts; said base further provided with a groove in its external surface to receive a thin fabric or the like suture element; 2. a one piece membrane formed on said frame to provide three leaflets of the valve; said formed leaflets being heat set in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
Claim 3
Dependent Claim
25 words
The prosthetic trileaflet type heart valve as defined in claim 1 wherein the frame comprises polycarbonate, polypropylene or polyurethane and the membrane comprises segmented polyurethane.
Claim 4
Dependent Claim
90 words
A prosthetic trileaflet type heart valve comprising: 1. a frame having a ring shaped base and three upstanding struts, which struts taper in thickness from the base to thin tips; said base further provided with a hemicylindrical groove in its external surface to receive a thin fabric or the like suture element; 2. a one piece plastic membrane forming three leaflets of valve; the formed leaflets are heat set in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
Claim 5
Dependent Claim
90 words
A prosthetic trileaflet type heart valve comprising: 1. a frame having a ring shaped base and three upstanding struts, which struts taper in thickness from the base to thin tips; said base further provided with a hemicylindrical groove in its external surface to receive a thin fabric or the like suture element; 2. a one piece plastic membrane forming three leaflets of valve; the formed leaflets are heat set in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
Claim 6
Dependent Claim
25 words
A prosthetic trileaflet type heart valve as defined in claims 1 or 3 wherein each leaflet is formed with a coaptation zone with adjacent leaflets.
Claim 7
Independent Claim
81 words
A method of making a prosthetic trileaflet type heart valve comprising: 1. forming a frame consisting of a ring shaped base with three upstanding struts, which struts taper in thickness from the base to thin tips; 2. forming on the frame a one piece plastic membrane which forms the three leaflets of the valve; 3. heat setting the formed leaflets in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
Claim 8
Independent Claim
81 words
A method of making a prosthetic trileaflet type heart valve comprising: 1. forming a frame consisting of a ring shaped base with three upstanding struts, which struts taper in thickness from the base to thin tips; 2. forming on the frame a one piece plastic membrane which forms the three leaflets of the valve; 3. heat setting the formed leaflets in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
Claim 9
Independent Claim
103 words
A method of making a prosthetic trileaflet type heart valve comprising: 1. forming a frame consisting of a ring shaped base with three upstanding struts, which struts taper in thickness from the base to thin tips; 2. forming in the base a hemicylindrical groove in its external surface to receive a thin fabric or the like suture element; 3. forming on the frame a one piece plastic membrane which forms the three leaflets of the valve; 4. heat setting the formed leaflets in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
Claim 10
Independent Claim
103 words
A method of making a prosthetic trileaflet type heart valve comprising: 1. forming a frame consisting of a ring shaped base with three upstanding struts, which struts taper in thickness from the base to thin tips; 2. forming in the base a hemicylindrical groove in its external surface to receive a thin fabric or the like suture element; 3. forming on the frame a one piece plastic membrane which forms the three leaflets of the valve; 4. heat setting the formed leaflets in a partially open position to reduce the pressure required to open the leaflets by blood flowing through the prosthetic valve.
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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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |