Patent US3886943A successfully refreshed from Google Patents.
US3886943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical instrument
Assignee: Individual
•
Filing: 1973-08-10
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Granted: 1975-06-03
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Expires: 1993-08-10
Abstract
Abstract A surgical instrument used in removing plaque from arterial walls to increase the amount of blood flow through the arteries. The instrument comprises an elongated arcuate member having single or double internal cutting edges and an outer curved surface which acts as a safety guide to prevent the cutting edge from cutting deeper than desired. The outer curved surface also causes the blade to follow the curvature of the arterial wall and to hold the blood vessel properly open. When double cutting edges are provided the instrument can be moved back and forth and from side to side for maximum plaque removal efficiency.
Inventors
- 👤 Aphrodite P Skiff
- 👤 John C Rauth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320708; A61B2017/320741
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A surgical instrument for removing plaque from blood vessels comprising a handle having a long tubular member an arcuate blade member describing an arc of less than half a circle connected to said long tubular member and having an outer surface of larger radius and an inner surface of smaller radius, said smaller radius being substantially larger than the diameter of said tubular member, including a distal non-cutting section having a rounded outer edge a proximal non-cutting section a midsection having a cutting edge positioned longitudinally between said distal and proximal sections, said cutting edge being positioned at a radius which does not exceed the radius of the outer surface.
Claim 2
Dependent Claim
110 words
A surgical instrument for removing plaque from blood vessels comprising a handle having a long tubular member an arcuate blade member describing an arc of less than half a circle connected to said long tubular member and having an outer surface of larger radius and an inner surface of smaller radius, said smaller radius being substantially larger than the diameter of said tubular member, including a distal non-cutting section having a rounded outer edge a proximal non-cutting section a midsection having a cutting edge positioned longitudinally between said distal and proximal sections, said cutting edge being positioned at a radius which does not exceed the radius of the outer surface.
Claim 3
Dependent Claim
110 words
A surgical instrument for removing plaque from blood vessels comprising a handle having a long tubular member an arcuate blade member describing an arc of less than half a circle connected to said long tubular member and having an outer surface of larger radius and an inner surface of smaller radius, said smaller radius being substantially larger than the diameter of said tubular member, including a distal non-cutting section having a rounded outer edge a proximal non-cutting section a midsection having a cutting edge positioned longitudinally between said distal and proximal sections, said cutting edge being positioned at a radius which does not exceed the radius of the outer surface.
Claim 4
Dependent Claim
110 words
A surgical instrument for removing plaque from blood vessels comprising a handle having a long tubular member an arcuate blade member describing an arc of less than half a circle connected to said long tubular member and having an outer surface of larger radius and an inner surface of smaller radius, said smaller radius being substantially larger than the diameter of said tubular member, including a distal non-cutting section having a rounded outer edge a proximal non-cutting section a midsection having a cutting edge positioned longitudinally between said distal and proximal sections, said cutting edge being positioned at a radius which does not exceed the radius of the outer surface.
Claim 5
Dependent Claim
28 words
The instrument of claim 1 wherein said proximal and said distal sections have arcuate circumferences that are greater than the arcuate circumference of substantially all of said midsection.
Claim 6
Dependent Claim
25 words
The instrument of claim 2 wherein the edge of the distal section hAs a slight point thereto and wherein the cutting edge is curved inwardly.
Claim 7
Dependent Claim
22 words
The instrument of claim 3 wherein a second cutting edge which is substantially identical and positioned opposite to the first cutting edge.
Claim 8
Dependent Claim
17 words
The instrument of claim 2 wherein a rear edge of said cutting section is a non-cutting edge.
Claim 9
Dependent Claim
24 words
The instrument of claim 5 wherein the cutting edge is straight and parallel to the axis of curvature of said inner and outer surfaces.
Claim 10
Dependent Claim
28 words
The instrument of claim 6 wherein two tabs extend from the distal and proximal sections of the blade toward each other and in front of the cutting edge.
Claim 11
Dependent Claim
14 words
The instrument of claim 7 wherein the distal section has a rounded outer edge.
References Cited (Backward Citations)
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US2331732A
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US2495794A
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US2730101A
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US2944552A
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US3448741A
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |