Patent US3161759A successfully refreshed from Google Patents.
EP0373927A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Medical device
Assignee: Medtronic Inc
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Filing: 1989-12-14
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Granted: —
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Expires: 2009-12-14
Abstract
Abstract A medical device for clearing obstructions in body vessels comprises a generally cylindrical housing (10) having a rotary screw (30) mounted therein. The screw (30) co-operates with an inner leading edge (17) of the housing (10) to provide a scissor-like cutting action. A tip region of the screw (30) projects forwardly of the housing (10) and is tapered for entering material to be removed. The tip region is of relatively blunt bullet-shape.
Inventors
- 👤 Man Fai Shiu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B2017/00681; A61B2017/00685; A61B17/22; A61B2017/22038
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
A medical device for removing material from a body vessel, comprising a generally cylindrical housing (10, 110, 210, 310) having a leading inner edge (17, 1176, 217, 317), a helical member (30, 130, 230, 330) mounted in the housing so that a portion of the helical member is enclosed by the housing and a tip region of the helical member projects forwardly of the housing, means (42, 142, 242, 342) for rotating the helical member relative to the housing so that, in use, material is cut as it enters the housing by co-operation between the outer periphery of the helical member and the leading inner edge of the housing, and means (46, 146, 246, 346) in the housing for receiving cut material, characterized in that the helical member (30, 130, 230, 330) comprises a screw whose tip region is tapered for entering material to be removed from the body vessel.
Claim 2
Dependent Claim
150 words
A medical device for removing material from a body vessel, comprising a generally cylindrical housing (10, 110, 210, 310) having a leading inner edge (17, 1176, 217, 317), a helical member (30, 130, 230, 330) mounted in the housing so that a portion of the helical member is enclosed by the housing and a tip region of the helical member projects forwardly of the housing, means (42, 142, 242, 342) for rotating the helical member relative to the housing so that, in use, material is cut as it enters the housing by co-operation between the outer periphery of the helical member and the leading inner edge of the housing, and means (46, 146, 246, 346) in the housing for receiving cut material, characterized in that the helical member (30, 130, 230, 330) comprises a screw whose tip region is tapered for entering material to be removed from the body vessel.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1, wherein the means for rotating the helical member is an elongate flexible drive means (42, 142, 242, 342).
Claim 4
Dependent Claim
19 words
A device as claimed in claim 1 or 2, wherein the leading outer edge of the housing is radiussed.
Claim 5
Independent Claim
31 words
A device as claimed in any preceding claim, wherein there is a scissor-like cutting cooperation between the screw (30, 130, 230, 330) and the leading inner edge (17, 117, 217, 317).
Claim 6
Independent Claim
30 words
A device as claimed in any preceding claim, wherein the housing includes an open ended sleeve (14, 150, 250, 350) which defines said leading inner edge (17, 117, 217, 317).
Claim 7
Independent Claim
21 words
A device as claimed in any preceding claim wherein the tip of the screw (30, 130, 230, 330) is relatively blunt.
Claim 8
Independent Claim
17 words
A device as claimed in any preceding claim, wherein the screw threading has a relatively sharp crest.
Claim 9
Independent Claim
16 words
A device as claimed in any preceding claim, wherein the screw threading has a self-tapping action.
References Cited (Backward Citations)
No citation records indexed.
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