US4245358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nontraumatic prosthetic valve with magnetic closure
Assignee: Individual
•
Filing: 1979-01-24
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Granted: 1981-01-20
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Expires: 1999-01-24
Abstract
Abstract An improved valve prosthesis for causing nontraumatic unidirectional flow of a pulsatory fluid, such as blood, through a conduit, such as a blood vessel. The valve includes two flaps, made of a suitable flexible material, attached by the proximal ends to opposite sides of a covered annular mounting structure. A pair of magnetic members are connected to the distal ends of the flaps thereby to exert sufficient attractive force to hold the flaps together in a closed position to prevent fluid flow through the valve. The magnetically-closed flaps are forced to an open position by the pressure of the fluid flowing through the conduit. A decrease in fluid pressure in combination with the attractive force exerted by the magnetic members permits the smooth, nontraumatic closure of the valve flaps.
Inventors
- 👤 Manoutcher Moasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2403; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7883; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
267 words
A prosthetic valve for causing unidirectional flow of a pulsatory fluid comprising: (a) mounting means positionable upstream within the flow of pulsatory fluid for forming an inlet through which the pulsatory fluid may flow into the valve; (b) valve outlet means for moving from a first configuration in which fluid flow through said inlet is cut off to a second configuration in which fluid may freely flow through said inlet from the upstream side to the downstream side of the valve in response to the fluid pressure upstream of the valve increasing above the fluid pressure downstream of the valve, said valve outlet means including a pair of flexible collapsible wall segments positioned on opposite sides of said mounting means, said flexible collapsible wall segments being deformed into contact to close said flow passage when said valve outlet means is in said first configuration, and being moved apart to open said flow passage when said valve outlet means moves to said second configuration; and (c) magnetic closure assisting means positioned adjacent the downstream end of said flexible collapsible wall segments providing a continuous bias force to said flexible collapsible wall segments tending to collapse said collapsible material to close said flow passage, said bias force being insufficient to maintain said collapsed condition when the upstream pressure is sufficiently greater than the downstream pressure to move said valve outlet means to said second configuration, said closure assisting means including a pair of opposed magnetic force created elements mounted, respectively, on opposite sides of said flexible collapsible wall segments adjacent the downstream end of said flexible collapsible wall segments.
Claim 2
Dependent Claim
267 words
A prosthetic valve for causing unidirectional flow of a pulsatory fluid comprising: (a) mounting means positionable upstream within the flow of pulsatory fluid for forming an inlet through which the pulsatory fluid may flow into the valve; (b) valve outlet means for moving from a first configuration in which fluid flow through said inlet is cut off to a second configuration in which fluid may freely flow through said inlet from the upstream side to the downstream side of the valve in response to the fluid pressure upstream of the valve increasing above the fluid pressure downstream of the valve, said valve outlet means including a pair of flexible collapsible wall segments positioned on opposite sides of said mounting means, said flexible collapsible wall segments being deformed into contact to close said flow passage when said valve outlet means is in said first configuration, and being moved apart to open said flow passage when said valve outlet means moves to said second configuration; and (c) magnetic closure assisting means positioned adjacent the downstream end of said flexible collapsible wall segments providing a continuous bias force to said flexible collapsible wall segments tending to collapse said collapsible material to close said flow passage, said bias force being insufficient to maintain said collapsed condition when the upstream pressure is sufficiently greater than the downstream pressure to move said valve outlet means to said second configuration, said closure assisting means including a pair of opposed magnetic force created elements mounted, respectively, on opposite sides of said flexible collapsible wall segments adjacent the downstream end of said flexible collapsible wall segments.
Claim 3
Dependent Claim
33 words
A valve as defined in claim 1, wherein said wall segments are extended laterally and are joined to form a tubular element, said joined wall segments being formed of non-resilient, biologically non-reactive fabric.
Claim 4
Dependent Claim
33 words
A valve as defined in claim 2, wherein said closure assisting means includes a pair of permanent magnets positioned on laterally opposite sides adjacent the downstream end of said flexible collapsible wall segments.
Claim 5
Dependent Claim
40 words
A valve as defined in claim 3, wherein said closure assisting means includes a pair of flexible non-resilient flaps connected at one end to said valve support means and at the other end to said pair of permanent magnets, respectively.
Claim 6
Dependent Claim
55 words
A valve as defined in claim 4, wherein said tubular element includes an internal dividing web joining the opposed inside wall surfaces of said tubular element, said internal dividing web being positioned to form a bifurcated passage for fluid flow through said tubular element when said valve outlet means is moved to said second configuration.
Claim 7
Dependent Claim
93 words
A valve as defined in claim 2, wherein said tubular element includes a pair of rigid projections positioned on opposite sides of said mounting means and extending downstream between said flexible collapsible wall segments, said pair of rigid projections forming a sealing engagement with said wall segments when said valve outlet means is in said first configuration, said closure assistance means including a pair of permanent magnets attached to the downstream ends of said wall segments, respectively, and being arranged to provide a mutually attractive force tending to pull said wall segments together.
Claim 8
Dependent Claim
52 words
A valve as defined in claim 4, wherein said valve outlet means includes a pair of rigid projections connected to opposed sides of said mounting means and extending in a downstream direction, said rigid projections providing support to said collapsible wall segments when said valve outlet means is in said first configuration.
Claim 9
Dependent Claim
21 words
A valve as defined in claim 7, wherein each said rigid projection includes two substantially arcuate protrussions on the downstream side.
Claim 10
Dependent Claim
40 words
A valve as defined in claim 1, wherein said mounting means includes a semi-rigid ring and a fabric material covering at least the outside surface of said ring to provide a suture holding surface for retaining said valve when implanted.
Claim 11
Dependent Claim
18 words
A valve, as defined in claim 1, wherein said flexible collapsible wall segments form a generally tubular element.
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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |