Patent US4056854A successfully refreshed from Google Patents.
US4056854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aortic heart valve catheter
Assignee: United States Department of Health and Human Services
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Filing: 1976-09-28
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Granted: 1977-11-08
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Expires: 1996-09-28
Abstract
Abstract An artificial valve remotely placeable in a blood vessel without major surgery to supplant the function of a malfunctioning natural valve including an expansible check valve remotely placed in a constricted configuration through the vessel and a remotely removable constraint for selective expansion of the check valve for sealing engagement thereof within the walls of the vessel at the desired location.
Inventors
- 👤 John W. Boretos
- 👤 Robert A. Poirier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2427; A61F2/2436; A61F2/2412; A61M; A61M25/00; A61M25/0067; A61M25/0074; A61M25/0075; A61F2250/00; A61F2250/0058; A61F2250/0059
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
A prosthetic valve device for remote placement in a major blood vessel to take over the function of a malfunctioning natural valve comprising: an expansible valve support; means biasing said support toward an open configuration to sealingly engage the interior walls of the blood vessel in which it is to be placed; check valve means in said support to block flow through said support in one direction; means to constrict said support in a closed configuration such that said device may be navigated through a blood vessel to a desired point of placement; means to remotely position said device through a blood vessel to a desired point of placement; and means to remotely remove said means to constrict from said support at a desired point of placement.
Claim 2
Dependent Claim
127 words
A prosthetic valve device for remote placement in a major blood vessel to take over the function of a malfunctioning natural valve comprising: an expansible valve support; means biasing said support toward an open configuration to sealingly engage the interior walls of the blood vessel in which it is to be placed; check valve means in said support to block flow through said support in one direction; means to constrict said support in a closed configuration such that said device may be navigated through a blood vessel to a desired point of placement; means to remotely position said device through a blood vessel to a desired point of placement; and means to remotely remove said means to constrict from said support at a desired point of placement.
Claim 3
Dependent Claim
26 words
The device in accordance with claim 1 wherein said means to constrict comprises an open-ended envelope enclosing said support to maintain it in said closed configuration.
Claim 4
Dependent Claim
24 words
The device in accordance with claim 2 wherein said means to remotely position said device comprises a flexible elongated member attached to said support.
Claim 5
Dependent Claim
37 words
The device in accordance with claim 3 wherein said means to remotely remove said means to constrict comprises a flexible elongated tubular member coaxially disposed around said flexibly elongated member substantially co-extensive therewith attached to said envelope.
Claim 6
Dependent Claim
23 words
The device in accordance with claim 4 wherein said tubular membrane is helically reinforced to provide lateral support for said flexibly elongated member.
Claim 7
Dependent Claim
40 words
The device in accordance with claim 1 wherein said support comprises plural arms connected together at one end thereof and resilient spring means interconnecting the other ends of said arms to bias them apart and form a substantially conical shape.
Claim 8
Dependent Claim
34 words
The device in accordance with claim 6 wherein said spring means comprise helical compression springs bowed to form an arcuate cusp between said other ends of each of said arms in said open configuration.
Claim 9
Dependent Claim
68 words
The device in accordance with claim 7 wherein said check valve means comprises a flexible tubular membrane attached to and coaxially disposed around said frame, said membrane extending from and enclosing said compression springs to point intermediate the ends of said arms to present a substantially tubular configuration for flow therethrough toward the apex of said arms and to collapse and block flow therethrough in the opposite direction.
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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |