Patent US2295788A successfully refreshed from Google Patents.
US4290427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endarterectomy apparatus
Assignee: Individual
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Filing: 1979-11-26
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Granted: 1981-09-22
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Expires: 1999-11-26
Abstract
Abstract A center-pull cutting annulus which is radially expansible is employed to achieve complete removal of arteriosclerotic material from occluded arteries.
Inventors
- 👤 Albert K. Chin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:31
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/32075; A61B17/320016; A61B17/22; A61B2017/22038; A61B2017/320741
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
In an endarterectomy instrument comprising an annular knife having a cutting adge at one end thereof, said knife being split longitudinally and having overlapped end portions to thereby enable said knife to be yieldingly compressible radially for insertion within an artery and to thereafter enable said knife to apply a substantially constant outwardly directed pressure against said artery as an arteriosclerotic occlusion is being excised, and having a wire carrier attached thereto whereby said knife may be moved along an occluded artery to excise said occlusion therefrom, said cutting edge being located at the end of the knife from which said wire carrier extends the provision of attachment means carried by said knife and positioned bodily within the axial confines and centrally of said knife for connecting said wire carrier thereto along substantially the longitudinal axis of said knife, said attachment means including a cutting edge to enable said means to cut through an occlusion being excised by said knife.
Claim 2
Dependent Claim
160 words
In an endarterectomy instrument comprising an annular knife having a cutting adge at one end thereof, said knife being split longitudinally and having overlapped end portions to thereby enable said knife to be yieldingly compressible radially for insertion within an artery and to thereafter enable said knife to apply a substantially constant outwardly directed pressure against said artery as an arteriosclerotic occlusion is being excised, and having a wire carrier attached thereto whereby said knife may be moved along an occluded artery to excise said occlusion therefrom, said cutting edge being located at the end of the knife from which said wire carrier extends the provision of attachment means carried by said knife and positioned bodily within the axial confines and centrally of said knife for connecting said wire carrier thereto along substantially the longitudinal axis of said knife, said attachment means including a cutting edge to enable said means to cut through an occlusion being excised by said knife.
Claim 3
Dependent Claim
172 words
In an endarterectomy instrument comprising an annular knife having a cutting edge at one end thereof, said knife being split longitudinally and having overlapped end portions to thereby enable said knife to be yieldingly compressible radially for insertion within an artery and to thereafter enable said knife to apply a substantially constant outwardly directed pressure against said artery as an arteriosclerotic occlusion is being excised, and having a wire carrier attached thereto whereby said knife may be moved along an occluded artery to excise said occlusion therefrom, the provision of attachment means carried by said knife for connecting said wire carrier thereto along substantially the longitudinal axis of said knife, said attachment means comprising an inwardly directed radially disposed rib member attached to said annular knife and extending to sustantially the center of said knife, said rib member having a cutting edge formed on it at its leading end, said wire carrier being attached to said rib member whereby said wire carrier is adapted to apply a center-pulling force to said knife.
Claim 4
Dependent Claim
172 words
In an endarterectomy instrument comprising an annular knife having a cutting edge at one end thereof, said knife being split longitudinally and having overlapped end portions to thereby enable said knife to be yieldingly compressible radially for insertion within an artery and to thereafter enable said knife to apply a substantially constant outwardly directed pressure against said artery as an arteriosclerotic occlusion is being excised, and having a wire carrier attached thereto whereby said knife may be moved along an occluded artery to excise said occlusion therefrom, the provision of attachment means carried by said knife for connecting said wire carrier thereto along substantially the longitudinal axis of said knife, said attachment means comprising an inwardly directed radially disposed rib member attached to said annular knife and extending to sustantially the center of said knife, said rib member having a cutting edge formed on it at its leading end, said wire carrier being attached to said rib member whereby said wire carrier is adapted to apply a center-pulling force to said knife.
Claim 5
Dependent Claim
26 words
The endarterectomy instrument of claim 2, the cutting edge of said rib member being disposed in following relation to the cutting edge of said annular knife.
Claim 6
Dependent Claim
40 words
The endarterectomy instrument of claim 3, the cutting edges of said knife and rib member being angularly inclined upwardly and rearwardly from the bottom of long side of said annular knife and being disposed in general parallelism with each other.
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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |