EP0136079A2
Expired / Lapsed
EP
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Surgical rasp and method of manufacture
Assignee: ADLER INSTRUMENT Co
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Filing: 1984-08-24
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Granted: —
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Expires: 2004-08-24
Abstract
Abstract A surgical rasp for scraping and reshaping bones, particularly useful in cosmetic surgery, comprises a handle and a rasp surfaced insert made from a tungsten carbide attached thereto. The tooth pattern of the rasped surface is created by cutting a plurality of substantially parallel grooves into the insert and subsequently cross cutting a plurality of substantially parallel grooves thereto. Further cross-cuts can be made depending on the particular tooth pattern desired. In a preferred embodiment, the teeth so formed have a trapezoidal-shaped face and a trapezoidal-shaped back which are coextensively integral to create a cutting edge. In an alternate preferred embodiment, the teeth so formed are shaped as three-sided truncated pyramids.
Inventors
- 👤 John A. Davison
- 👤 Robert J. Kellar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 22:19
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1659; Y; Y10; Y10T; Y10T407/00; Y10T407/18
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
36 words
A surgical rasp for smoothing and shaping bones comprising an insert attached to a handle characterised in that the insert, preferably of tungsten carbide, has a plurality of grooves cut thereon to form a textured surface.
Claim 2
Dependent Claim
36 words
A surgical rasp for smoothing and shaping bones comprising an insert attached to a handle characterised in that the insert, preferably of tungsten carbide, has a plurality of grooves cut thereon to form a textured surface.
Claim 3
Dependent Claim
59 words
A surgical rasp according to Claim 1 wherein said textured surface comprises a plurality of substantially parallel scraping grooves, preferably extending generally perpendciular to the longitudinal axis of the handle, and at least one series of diagonal grooves which comprise a plurality of substantially parallel cross-cut grooves transverse to said scraping grooves, said grooves preferably being v-shaped in cross-section.
Claim 4
Dependent Claim
51 words
A surgical rasp according to Claim 1 or 2 in which at least some of the grooves comprise a first side generally perpendicular to a surface of the insert and a second side transverse to said surface and spaced apart from an adjacent groove to form a sharp cutting edge therebetween.
Claim 5
Dependent Claim
95 words
A surgical rasp according to Claim 1 in which said textured surface comprises a plurality of teeth, preferably solid substantially flat-sided cutting teeth wherein each of said teeth are formed with a trapezoidal-shaped face side having a bottom margin integral with said insert and a top margin parallel to the bottom margin a trapezoidal-shaped back side having a bottom margin generally parallel to the bottom margin of said face side and integral with said insert and having a top margin coextensively integral with the top margin of said face side to form a cutting edge.
Claim 6
Dependent Claim
72 words
A surgical rasp according to Claim 4 wherein the projection of the top margin of said face side onto the bottom margin of said face side lies between the end points of the bottom margin of said face side and preferably the projection of the top margin of said back side onto the bottom margin of said back side lies between the end points of the bottom margin of said back side.
Claim 7
Dependent Claim
20 words
A surgical rasp according to Claim 5 wherein said face side is generally perpendicular to the surface of said insert.
Claim 8
Dependent Claim
195 words
A surgical rasp according to Claim 1 in which said abrasive surface is formed with a first plurality of grooves, each of said first plurality of grooves having a flat bottom in the plane of said surface, a flat first side transverse to said bottom and inclined at an obtuse angle thereto, and a flat second side transverse to said bottom and inclined at an obtuse angle thereto, a second plurality of grooves generally perpendicular to said first plurality of grooves and having a flat bottom in the plane of said surface, a flat first side transverse to said bottom and inclined at an obtuse angle thereto, and a flat second side transverse to said bottom and inclined at an obtuse angle thereto, a third plurality of grooves substantially bisecting the angle between said first plurality of grooves and said second plurality of grooves and having a flat bottom in the plane of said surface, a flat first side transverse to said bottom and inclined at an obtuse angle thereto and a second side substantially perpendicular to said bottom, said third plurality of grooves preferably being substantially perpendicular to the longitudinal axis of said handle.
Claim 9
Dependent Claim
65 words
A surgical rasp according to Claim 7 wherein each groove of said first plurality of grooves is spaced apart from each adjacent parallel groove, and each groove of said second plurality of grooves is spaced apart from each adjacent parallel groove, and each groove of said third plurality of grooves is spaced apart from each adjacent parallel groove to form a pattern of truncated pyramids.
Claim 10
Dependent Claim
68 words
A surgical rasp according to Claim 1 in which said textured surface is formed with a plurality of truncated pyramid-shaped teeth, preferably with at least one side of each of said truncated pyramid-shaped teeth being substantially perpendicular to the surface of said insert, and, also preferably, each of said plurality of truncated pyramid-shaped teeth being formed with a substantially flat top which is substantially parallel to said surface.
Claim 11
Dependent Claim
21 words
A surgical rasp according to Claim 9 wherein each of said truncated pyramid-shaped teeth is spaced apart from each adjacent tooth.
Claim 12
Dependent Claim
24 words
A surgical rasp according to any of the preceding claims wherein the cutting edges are in staggered overlapping alignment for smoothly scraping a surface.
Claim 13
Independent Claim
67 words
A method of manufacturing a surgical rasp as claimed in any of Claims 1 to 11 comprising cutting a first plurality of grooves into the surface of an insert; cross cutting a second plurality of grooves into the surface of said insert; where required cross cutting a third plurality of grooves into the surface of said insert; and attaching said insert to a handle, preferably by brazing.
References Cited (Backward Citations)
No citation records indexed.
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