US4728319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravascular catheter
Assignee: Individual
•
Filing: 1986-05-21
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Granted: 1988-03-01
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Expires: 2006-05-21
Abstract
Abstract An intravascular catheter includes a flexible guide wire mounted for relative rotational and reciprocal movements within a reciprocal and flexible first tube. A rotary and flexible second tube is mounted on the first tube to define an annular passage therebetween and has a rotary inner cutting head secured on a distal end thereof. The inner cutting head is closely fitted within an outer cutting head that is secured on the first tube. The cutting heads are adapted to cut a blockage in a blood vessel into fragments in response to rotation of the second tube and inner cutting head. The fragments are flushed-out from the inner cutting head and are conveyed away from the cutting heads and through the annular passage by facing spiral threads defined on the first and second tubes.
Inventors
- 👤 Helmut Masch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:40
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1442; A61B17/22; A61B2017/22038; A61B2018/00315; A61B2018/00452; A61B2018/00476; A61B2217/00; A61B2217/002; A61B2217/005; A61B2217/007
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
112 words
An intravascular catheter for clearing a blockage in a blood vessel or the like comprising a flexible first tube, flexible guide means movably mounted within said first tube for locating said vessel, a rotary flexible second tube rotatable relative to said first tube and having said first tube mounted therein to define a passage therebetween, cutting means for cutting said blockage into fragments in response to continuous rotation of said second tube, and conveying means defined between said first and second tubes for mechanically inducing and moving said fragments away from said cutting means and through said passage in response to continuous rotation of said second tube relative to said first tube.
Claim 2
Dependent Claim
112 words
An intravascular catheter for clearing a blockage in a blood vessel or the like comprising a flexible first tube, flexible guide means movably mounted within said first tube for locating said vessel, a rotary flexible second tube rotatable relative to said first tube and having said first tube mounted therein to define a passage therebetween, cutting means for cutting said blockage into fragments in response to continuous rotation of said second tube, and conveying means defined between said first and second tubes for mechanically inducing and moving said fragments away from said cutting means and through said passage in response to continuous rotation of said second tube relative to said first tube.
Claim 3
Dependent Claim
29 words
The catheter of claim 1 wherein said guide means comprises an elongated and flexible wire reciprocally and rotatably mounted within first said tube and defining an annular passage therebetween.
Claim 4
Dependent Claim
34 words
The catheter of claim 1 wherein said conveying means comprises a spiral thread formed on at least one of an outer surface of said first tube or an inner surface of said second tube.
Claim 5
Dependent Claim
52 words
The catheter of claim 3 wherein said conveying means comprises a left hand spiral thread formed on the outer surface of said first tube and a right hand spiral thread formed on the inner surface of said second tube to face the thread formed on the outer surface of said first tube.
Claim 6
Dependent Claim
29 words
The catheter of claim 4 wherein each of said threads comprise a spiral wire encapsulated by a plastic material composing a relative one of said first and second tubes.
Claim 7
Dependent Claim
31 words
The catheter of claim 4 wherein each of said threads extend substantially throughout the entire length of a respective one of first and second tubes and has a substantially uniform pitch.
Claim 8
Dependent Claim
58 words
The catheter of claim 1 further comprising a flexible third tube having said first and second tubes mounted therein and an annular passage defined between said second and third tubes that is open at its distal end and sized to receive said cutting means therein in response to retraction of said second tube relative to said third tube.
Claim 9
Dependent Claim
64 words
The catheter of claim 7 wherein said cutting means comprises an outer cutting head secured on said first tube, an inner cutting head secured on a distal end of said second tube for simultaneous rotation therewith and disposed in protected relationship within said outer cutting head and cooperating blade means formed on said inner and outer cutting heads for cutting said blockage into fragments.
Claim 10
Dependent Claim
44 words
The catheter of claim 8 wherein said blade means define a plurality of slots through each of said inner and outer cutting heads for communicating the passage defined between said second and third tubes with the passage defined between said first and second tubes.
Claim 11
Dependent Claim
20 words
The catheter of claim 8 wherein each of said inner and outer cutting heads are at least generally spherically shaped.
Claim 12
Dependent Claim
147 words
An intravascular catheter for clearing a blockage in a blood vessel or the like comprising a flexible first tube, a rotary flexible second tube rotatable relative to said first tube and having said first tube mounted therein to define a passage therebetween, and rotary cutting means for engaging and cutting said blockage into fragments including an outer cutting head secured on said first tube, an inner cutting head secured on said second tube for simultaneous rotation therewith and rotatably mounted in protected relationship within said outer cutting head, cooperating blade means formed on each of such inner and outer cutting heads for cutting said blockage into fragments in response to rotation of said second tube and, conveying means defined between said first and second tubes and responsive to relative rotation therebetween for mechanically inducing and conveying said fragments away from said cutting means and through said passage.
Claim 13
Dependent Claim
147 words
An intravascular catheter for clearing a blockage in a blood vessel or the like comprising a flexible first tube, a rotary flexible second tube rotatable relative to said first tube and having said first tube mounted therein to define a passage therebetween, and rotary cutting means for engaging and cutting said blockage into fragments including an outer cutting head secured on said first tube, an inner cutting head secured on said second tube for simultaneous rotation therewith and rotatably mounted in protected relationship within said outer cutting head, cooperating blade means formed on each of such inner and outer cutting heads for cutting said blockage into fragments in response to rotation of said second tube and, conveying means defined between said first and second tubes and responsive to relative rotation therebetween for mechanically inducing and conveying said fragments away from said cutting means and through said passage.
Claim 14
Dependent Claim
20 words
The catheter of claim 11 further comprising flexible guide means movably mounted in said first tube for locating said vessel.
Claim 15
Dependent Claim
21 words
The catheter of claim 11 further comprising an elongated and flexible guide wire reciprocally and rotatably mounted within first said tube.
Claim 16
Dependent Claim
62 words
The catheter of claim 11 wherein said conveying means includes a spiral thread formed on at least one of an outer surface of said first tube and an inner surface of said second tube for moving said fragments away from said cutting means and through the passage defined between said first and second tubes in response to rotation of said second tube.
Claim 17
Dependent Claim
52 words
The catheter of claim 14 wherein said conveying means comprises a left hand spiral thread formed on the outer surface of said first tube and a right hand spiral thread formed on the inner surface of said second tube to face the thread formed on the outer surface of said first tube.
Claim 18
Dependent Claim
53 words
The catheter of claim 11 further comprising a flexible third tube having said first and second tubes mounted therein and an annular passage defined between said second and third tubes that is open at its distal end and sized to receive said cutting means therein in response to retraction of said second tube.
Claim 19
Dependent Claim
44 words
The catheter of claim 16 wherein said blade means define a plurality of slots through each of said inner and outer cutting heads for communicating the passage defined between said second and third tubes with a passage defined between said first and second tubes.
Claim 20
Dependent Claim
20 words
The catheter of claim 11 wherein each of said inner and outer cutting heads are at least generally spherically shaped.
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |