US3636955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical cutting needle
Assignee: Sanofi Biosurgery Inc
•
Filing: 1969-12-03
•
Granted: 1972-01-25
•
Expires: 1989-12-03
Abstract
Abstract An improved surgical needle of the type having a simple main cutting edge extending across the needle and formed by the intersection of two planar surfaces, for use in cutting through bone, cartilage or other hard body tissue material. The forward end of the needle includes a third planar surface extending at an angle to the axis of the needle and forming, as its intersection with one of the first two mentioned planar surfaces, a strong rearwardly sloped chisel cutting edge arranged to impinge on the hard material to be cut.
Inventors
- 👤 Leonard D Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3209; A61B17/3211; A61B17/04; A61B17/06; A61B17/06066
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
217 words
A surgical cutting needle comprising a body portion and a cutting portion, the latter having a longitudinal axis, said cutting portion having a main cutting edge formed by the intersection of first and second substantially planar surfaces, said main cutting edge lying on a line which intersects the said axis and defines with said axis a reference plane, a third planar surface intersecting the first and second planar surfaces and forming the forward end of the cutting portion away from the said body portion, said main cutting edge extending from the outer periphery of the needle forwardly toward the tip of the needle to an intersection with the said third planar surface, the plane of the third planar surface forming an angle other than 90* with the said reference plane wherein the intersection of the third planar surface with one of the first two planar surfaces forms a chiseltype forward cutting edge extending along the forward end of the needle from its intersection with said main cutting edge forwardly to the forwardmost tip of the needle at the intersection of the chisel-type cutting edge with the outer periphery of the needle whereby the chisel-Type forward cutting edge provides sharp initial penetration into hard tissue material and subsequent cutting thereof is done by the said main cutting edge.
Claim 2
Dependent Claim
217 words
A surgical cutting needle comprising a body portion and a cutting portion, the latter having a longitudinal axis, said cutting portion having a main cutting edge formed by the intersection of first and second substantially planar surfaces, said main cutting edge lying on a line which intersects the said axis and defines with said axis a reference plane, a third planar surface intersecting the first and second planar surfaces and forming the forward end of the cutting portion away from the said body portion, said main cutting edge extending from the outer periphery of the needle forwardly toward the tip of the needle to an intersection with the said third planar surface, the plane of the third planar surface forming an angle other than 90* with the said reference plane wherein the intersection of the third planar surface with one of the first two planar surfaces forms a chiseltype forward cutting edge extending along the forward end of the needle from its intersection with said main cutting edge forwardly to the forwardmost tip of the needle at the intersection of the chisel-type cutting edge with the outer periphery of the needle whereby the chisel-Type forward cutting edge provides sharp initial penetration into hard tissue material and subsequent cutting thereof is done by the said main cutting edge.
Claim 3
Dependent Claim
16 words
A surgical needle as claimed in claim 1 wherein the said angle is approximately 45* .
Claim 4
Dependent Claim
30 words
A surgical needle as claimed in claim 1 wherein the line of intersection between the third planar surface and the reference plane is substantially perpendicular to the said needle axis.
Claim 5
Dependent Claim
16 words
A surgical needle as claimed in claim 3 wherein the said angle is approximately 45* .
Claim 6
Dependent Claim
31 words
A surgical needle as claimed in claim 4 wherein the line of intersection of the third planar surface and the reference plane forms an angle with the axis of the needle.
Claim 7
Dependent Claim
28 words
A surgical needle as claimed in claim 5 wherein the said angle between the reference plane and the plane of the third planar surface is approximately 45* .
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |