US4754755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter with a rotary blade
Assignee: Individual
•
Filing: 1987-07-27
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Granted: 1988-07-05
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Expires: 2007-07-27
Abstract
Abstract A catheter for inserting into a patient's artery and for remotely cutting and removing an obstruction therein, having a flexible tube equipped with a tubular blade rotatably mounted at its first end and driven by a motor through a flexible shaft, and a suction pump at its other end for cutting, ingesting and extracting the obstruction.
Inventors
- 👤 Royce H. Husted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:56
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/22; A61B17/22004; A61B17/22012; A61B17/320758; A61B17/320783; A61B18/00; A61B18/04; A61B18/08; A61B18/082; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B18/245; F; F16; F16C; F16C1/00; F16C1/02; F16D; F16D7/00; F16D7/02; A61B2017/320733; F16C2316/00; F16C2316/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A catheter for clearing arterial obstructions comprising: flexible tube means adapted to be inserted into an artery adjacent to an obstruction; substantially hollow cutter means comprising a thin walled cylinder having a cutting edge at its forward end for rotatably slicing into said obstruction; bearing means for supporting said cutter means in axial alignment with at least partially within the forward end of said flexible tube means; a thin flexible wire means attached to the wall of said cylinder for imparting an off-center rotational drive force to said cutter means and providing a substantially obstruction-free passageway through said cylinder; and drive means for rotating said flexible wire means.
Claim 2
Dependent Claim
108 words
A catheter for clearing arterial obstructions comprising: flexible tube means adapted to be inserted into an artery adjacent to an obstruction; substantially hollow cutter means comprising a thin walled cylinder having a cutting edge at its forward end for rotatably slicing into said obstruction; bearing means for supporting said cutter means in axial alignment with at least partially within the forward end of said flexible tube means; a thin flexible wire means attached to the wall of said cylinder for imparting an off-center rotational drive force to said cutter means and providing a substantially obstruction-free passageway through said cylinder; and drive means for rotating said flexible wire means.
Claim 3
Dependent Claim
25 words
The catheter of claim 1 wherein said cutting edge tapers inwardly for guiding cut material from said obstruction toward the interior of said thin cylinder.
Claim 4
Dependent Claim
25 words
The catheter of claim 2, further including means for applying a negative pressure to said flexible tube means for assisting entry of cut material therein.
Claim 5
Dependent Claim
37 words
The catheter of claim 1 wherein said thin cylinder includes a hole in its wall for attachment of said wire means to said cylinder, said hole extending substantially parallel to the axis of said flexible tube means.
Claim 6
Independent Claim
107 words
A method for clearing an obstruction in an artery comprising the steps of: inserting into an artery a flexible tubular catheter having a hollow cutter rotatably supported therein; positioning the tubular catheter with the hollow cutter adjacent to and in contact with an obstruction; rotating the hollow cutter by means of an off-center flexible shaft affixed to a wall of the hollow cutter to provide a substantially obstruction free passageway into the tubular catheter for reception of cut material; applying negative pressure to the other end of the tubular catheter to suck cut material into the catheter; and removing the catheter and its contents from the artery.
Claim 7
Independent Claim
107 words
A method for clearing an obstruction in an artery comprising the steps of: inserting into an artery a flexible tubular catheter having a hollow cutter rotatably supported therein; positioning the tubular catheter with the hollow cutter adjacent to and in contact with an obstruction; rotating the hollow cutter by means of an off-center flexible shaft affixed to a wall of the hollow cutter to provide a substantially obstruction free passageway into the tubular catheter for reception of cut material; applying negative pressure to the other end of the tubular catheter to suck cut material into the catheter; and removing the catheter and its contents from the artery.
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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) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |