US3932898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthetic heart valve separately formed cage
Assignee: National Research Development Corp UK
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Filing: 1974-09-04
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Granted: 1976-01-20
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Expires: 1994-09-04
Abstract
Abstract The valve body of a prosthetic heart valve of annular base-cage-ball or disc type has its annular base member circumferentially grooved around its outer periphery and its cage formed with arcuate members held in such grooving. Preferably the arcuate members are formed with the other cage members from a single length of material to a closed loop configuration with four axially directed cage portions joined remotely from the base and interconnected by two diagonally opposed quadrant portions seated in the base groove. One of the base groove side walls is notched to receive the cage portions and this can provide a snap fit or the quandrants can be tied by threading in the groove.
Inventors
- 👤 John Thomas Matthew Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:53
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2421; A61F2/2424; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7911; Y10T137/7912
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
In a prosthetic heart valve comprising a valve body including an annular base member, from circumferentially spaced positions of which a plurality of elongate members extend first generally axially and then mutually inwardly to define a cage, and which further comprises a movable valve member captively located in said cage for movement into and out of valve-closure seating engagement with said base member, the improved valve body construction in which: said base member is formed with a circumferential groove around its radially outer periphery; said elongate cage members are interconnected by arcuate members held in said groove; said elongate cage members and said arcuate members are defined by successive portions of a single elongate member having its free ends fixed to other points therealong to form a closed loop configuration; and said configuration includes two arcuate member portions of diametrally opposed quadrant shape and location, and four elongate cage member portions extending generally axially from respective ends of said arcuate member portions, said elongate cage member portions being formed mutually inwardly and interconnected at their ends remote from said arcuate member portions.
Claim 2
Dependent Claim
182 words
In a prosthetic heart valve comprising a valve body including an annular base member, from circumferentially spaced positions of which a plurality of elongate members extend first generally axially and then mutually inwardly to define a cage, and which further comprises a movable valve member captively located in said cage for movement into and out of valve-closure seating engagement with said base member, the improved valve body construction in which: said base member is formed with a circumferential groove around its radially outer periphery; said elongate cage members are interconnected by arcuate members held in said groove; said elongate cage members and said arcuate members are defined by successive portions of a single elongate member having its free ends fixed to other points therealong to form a closed loop configuration; and said configuration includes two arcuate member portions of diametrally opposed quadrant shape and location, and four elongate cage member portions extending generally axially from respective ends of said arcuate member portions, said elongate cage member portions being formed mutually inwardly and interconnected at their ends remote from said arcuate member portions.
Claim 3
Dependent Claim
30 words
A valve according to claim 1 wherein said cage member portions have the collective shape of four uniformly spaced generators of a frusto-cone which is hemispherically rounded at its apex.
Claim 4
Dependent Claim
37 words
A valve according to claim 1 wherein each cage member portion is connected, remotely from said arcuate member portions, only with that cage member portion extending from the respectively adjacent end of the other arcuate member portion.
Claim 5
Dependent Claim
139 words
In a prosthetic heart valve comprising a valve body including an annular base member, from circumferentially spaced positions of which a plurality of elongate members extend first generally axially and then mutually inwardly to define a cage, in which further comprises a movable valve member captively located in said cage for movement into and out of valve-closure seating engagement with said base member, the improved valve body construction in which: said base member is formed with a circumferential groove around its radially outer periphery; said elongate cage members are interconnected by arcuate members located in said groove; one side wall of said groove is notched to receive said elongate cage members; and adjacent junctions of said elongate cage members and said arcuate members are tied by thread passing along said groove to hold said cage in said base member.
Claim 6
Dependent Claim
139 words
In a prosthetic heart valve comprising a valve body including an annular base member, from circumferentially spaced positions of which a plurality of elongate members extend first generally axially and then mutually inwardly to define a cage, in which further comprises a movable valve member captively located in said cage for movement into and out of valve-closure seating engagement with said base member, the improved valve body construction in which: said base member is formed with a circumferential groove around its radially outer periphery; said elongate cage members are interconnected by arcuate members located in said groove; one side wall of said groove is notched to receive said elongate cage members; and adjacent junctions of said elongate cage members and said arcuate members are tied by thread passing along said groove to hold said cage in said base member.
Claim 7
Dependent Claim
122 words
In a prosthetic heart valve comprising a valve body including an annular base member, from circumferentially spaced positions of which a plurality of elongate members extend first generally axially and then mutually inwardly to define a cage, and which further comprises a movable valve member captively located in said cage for movement into and out of valve-closure seating engagement with said member, the improved valve body construction in which: said base member is formed with a circumferential groove around its radially outer periphery; said elongate cage members are interconnected by arcuate members located in said groove; and one side wall of said groove is notched to receive said elongate cage members in a snap-fit to hold said cage in said base member.
Claim 8
Dependent Claim
122 words
In a prosthetic heart valve comprising a valve body including an annular base member, from circumferentially spaced positions of which a plurality of elongate members extend first generally axially and then mutually inwardly to define a cage, and which further comprises a movable valve member captively located in said cage for movement into and out of valve-closure seating engagement with said member, the improved valve body construction in which: said base member is formed with a circumferential groove around its radially outer periphery; said elongate cage members are interconnected by arcuate members located in said groove; and one side wall of said groove is notched to receive said elongate cage members in a snap-fit to hold said cage in said base member.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |