Patent US4318763A successfully refreshed from Google Patents.
US4561129A
Expired / Lapsed
US
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Low-profile biological bicuspid valve
Assignee: BOSA SpA
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Filing: 1983-10-11
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Granted: 1985-12-31
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Expires: 2003-10-11
Abstract
Abstract This invention relates to a "biological" valve suitable for surgical treatment of cardiopathies, composed of a supporting ring having a diametrically-disposed element which functions as a support for the hinge of the two flaps which alternately allow and prevent flow through the device. It is designed in such a way that the angle formed by these flaps in the resting position conditions both the height of the prosthesis as well as the mechanical behavior of the aforementioned flaps.
Inventors
- 👤 Marco Arpesella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
164 words
A low-profile biological bicuspid valve prosthesis comprising: an annular-like frame having a peripheral external groove disposed around its outside surface; an annular-like thickening crown coupled to said frame and engaged with said groove; a covering on said crown; and a rib centrally disposed within said frame with two flaps fixed to said rib so as to allow movement thereof between an open and closed position relative to said frame, said rib having a generally sawhorse-like configuration and comprising two arched members, each composed of a center base member and two legs depending from opposite ends thereof, which arched members are joined together along their respective center base members with their respective legs diverging laterally outwardly therefrom in a V-like manner, said arched members are secured at both ends to an inner surface of said annular-like frame, said legs each terminating at a point on an inner surface of said frame which represents approximately the lower final point for fixing said flaps to said rib.
Claim 2
Dependent Claim
164 words
A low-profile biological bicuspid valve prosthesis comprising: an annular-like frame having a peripheral external groove disposed around its outside surface; an annular-like thickening crown coupled to said frame and engaged with said groove; a covering on said crown; and a rib centrally disposed within said frame with two flaps fixed to said rib so as to allow movement thereof between an open and closed position relative to said frame, said rib having a generally sawhorse-like configuration and comprising two arched members, each composed of a center base member and two legs depending from opposite ends thereof, which arched members are joined together along their respective center base members with their respective legs diverging laterally outwardly therefrom in a V-like manner, said arched members are secured at both ends to an inner surface of said annular-like frame, said legs each terminating at a point on an inner surface of said frame which represents approximately the lower final point for fixing said flaps to said rib.
Claim 3
Dependent Claim
31 words
The prosthesis of claim 1, wherein said frame and rib are made from a biocompatible material selected from the group consisting of a linear polyoxymethylene-type acetal resin, carbon fiber or plastic.
Claim 4
Dependent Claim
12 words
The prosthesis of claim 2, wherein said plastic material comprises foamed PTFE.
Claim 5
Dependent Claim
12 words
The prosthesis of claim 1, wherein said rib comprises a straight rib.
Claim 6
Dependent Claim
12 words
The prosthesis of claim 1, wherein said rib comprises an arched rib.
Claim 7
Dependent Claim
22 words
The prosthesis of claim 1, wherein said covering comprises a member selected from the group consisting of pericardium, polyester fiber or PTFE.
Claim 8
Dependent Claim
21 words
The prosthesis of claim 1, wherein said flaps in said closed position thereof form an angle of between 44° and 56°.
Claim 9
Dependent Claim
12 words
The prosthesis of claim 1, wherein said frame has a cylindrical configuration.
Claim 10
Dependent Claim
29 words
The prosthesis of claim 1, wherein said frame has a configuration obtained by straightening the two arch members subtended by the four lower points of intersection with the flaps.
Claim 11
Dependent Claim
21 words
The prosthesis of claim 1, wherein said flaps are formed from a single piece of material disposed centrally over said rib.
Claim 12
Dependent Claim
41 words
The prosthesis of claim 1, wherein said flaps are composed of two separate, dome-shaped elements made integral with said arch members by means of two extensions of the internal and external covering material, these being fixed together by means of sutures.
Claim 13
Dependent Claim
14 words
The prosthesis of claim 1, wherein said flaps are made of a biocompatible material.
Claim 14
Dependent Claim
11 words
The prosthesis of claim 12, wherein said biocompatible material is pericardium.
Claim 15
Dependent Claim
11 words
The prosthesis of claim 12, wherein said biocompatible material is PTFE.
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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) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |