US4625725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical rasp and method of manufacture
Assignee: Warner Lambert Co LLC
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Filing: 1983-08-30
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Granted: 1986-12-02
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Expires: 2003-08-30
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
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1659; Y; Y10; Y10T; Y10T407/00; Y10T407/18
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
119 words
A surgical rasp comprising: a handle; and an insert rigidly attached to said handle having a surface formed with a plurality of generally v-shaped scraping grooves, each of said scraping grooves having a first side generally perpendicular to said surface and a second side transverse to said surface and spaced apart from each adjacent said scraping groove to form a sharp cutting edge therebetween, and a plurality of generally v-shaped diagonal grooves, cross-cut to said plurality of scraping grooves, each of said diagonal grooves having a first side generally perpendicular to said surface and a second side transverse to said surface and spaced apart from each adjacent said diagonal groove to provide for elongation of said sharp cutting edges.
Claim 2
Dependent Claim
119 words
A surgical rasp comprising: a handle; and an insert rigidly attached to said handle having a surface formed with a plurality of generally v-shaped scraping grooves, each of said scraping grooves having a first side generally perpendicular to said surface and a second side transverse to said surface and spaced apart from each adjacent said scraping groove to form a sharp cutting edge therebetween, and a plurality of generally v-shaped diagonal grooves, cross-cut to said plurality of scraping grooves, each of said diagonal grooves having a first side generally perpendicular to said surface and a second side transverse to said surface and spaced apart from each adjacent said diagonal groove to provide for elongation of said sharp cutting edges.
Claim 3
Dependent Claim
24 words
A surgical rasp as cited in claim 1 wherein said plurality of scraping grooves are generally perpendicular to the longitudinal axis of said handle.
Claim 4
Dependent Claim
17 words
A surgical rasp as cited in claim 2 wherein said insert is made of a tungsten carbide.
Claim 5
Dependent Claim
103 words
A surgical rasp for scraping bones comprising: a handle; and an insert rigidly attached to said handle and having a surface formed with a plurality of 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
103 words
A surgical rasp for scraping bones comprising: a handle; and an insert rigidly attached to said handle and having a surface formed with a plurality of 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 7
Dependent Claim
40 words
A surgical rasp as cited in 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.
Claim 8
Dependent Claim
40 words
The surgical rasp as cited in claim 5 wherein 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 9
Dependent Claim
21 words
The surgical rasp as cited in claim 6 wherein said face side is generally perpendicular to the surface of said insert.
Claim 10
Dependent Claim
22 words
The surgical rasp as cited in claim 7 wherein said cutting edges are in staggered overlapping alignment for smoothly scraping a surface,
Claim 11
Dependent Claim
21 words
The surgical rasp as cited in claim 8 wherein said cutting teeth and said insert are made of a tungsten carbide.
Claim 12
Dependent Claim
146 words
A surgical rasp for smoothing and shaping bones, comprising: a handle; a tungsten carbide insert rigidly attached to said handle; said insert having a plurality of substantially parallel generally V-shaped first grooves substantialy perpendicular to the longitudinal axis of said handle, said first grooves having a first groove angle and a first cut depth; said insert having a plurality of substantially parallel generally V-shaped second grooves oriented at a predetermined cut angle with respect to said first grooves, said second grooves having a second groove angle and a second cut depth; said first grooves and said second grooves forming a plurality of rasp teeth having a leading face substantially perpendicular to the surface of said insert, an oppositely disposed back side face transverse to the surface of said insert, a third side face substantially perpendicular to the surface of said insert, and a fourth side face.
Claim 13
Dependent Claim
146 words
A surgical rasp for smoothing and shaping bones, comprising: a handle; a tungsten carbide insert rigidly attached to said handle; said insert having a plurality of substantially parallel generally V-shaped first grooves substantialy perpendicular to the longitudinal axis of said handle, said first grooves having a first groove angle and a first cut depth; said insert having a plurality of substantially parallel generally V-shaped second grooves oriented at a predetermined cut angle with respect to said first grooves, said second grooves having a second groove angle and a second cut depth; said first grooves and said second grooves forming a plurality of rasp teeth having a leading face substantially perpendicular to the surface of said insert, an oppositely disposed back side face transverse to the surface of said insert, a third side face substantially perpendicular to the surface of said insert, and a fourth side face.
Claim 14
Dependent Claim
20 words
The surgical rasp of claim 10, wherein said first cut depth and said second cut depth are about 0.028 inches.
Claim 15
Dependent Claim
28 words
The surgical rasp of claim 10, wherein said leading face and said back face are trapezoidal, and said third side face and said fourth side face are triangular.
Claim 16
Dependent Claim
34 words
The surgical rasp of claim 10, wherein each of said first grooves are spaced apart a predetermined first index distance, and each of said second grooves are spaced apart a predetermined second index distance.
Claim 17
Dependent Claim
30 words
The surgical rasp of claim 13, wherein said first index distance is different from said second index distance such that each of said rasp teeth have an elongated cutting edge.
Claim 18
Dependent Claim
24 words
The surgical rasp of claim 14, wherein said first index distance is about 0.050 inches and said second index distance is about 0.054 inches.
Claim 19
Dependent Claim
20 words
The surgical rasp of claim 10, wherein said first groove angle is between about 30 degrees and about 75 degrees.
Claim 20
Dependent Claim
15 words
The surgical rasp of claim 16, wherein said first groove angle is about 60 degrees.
Claim 21
Dependent Claim
20 words
The surgical rasp of claim 10, wherein said second groove angle is between about 30 degrees and about 75 degrees.
Claim 22
Dependent Claim
15 words
The surgical rasp of claim 18, wherein said second groove angle is about 60 degrees.
Claim 23
Dependent Claim
19 words
The surgical rasp of claim 10, wherein said cut angle is between about 15 degrees and about 50 degrees.
Claim 24
Dependent Claim
14 words
The surgical rasp of claim 20, wherein said cut angle is about 30 degrees.
Claim 25
Dependent Claim
164 words
A surgical rasp for smoothing and shaping bones, comprising: a handle; a tungsten carbide insert rigidly attached to said handle; said insert having a plurality of substantially parallel generally v-shaped first grooves substantially perpendicular to the longitudinal axis of said handle; said insert having a plurality of substantially parallel generally v-shaped second grooves oriented at a predetermined cut angle with respect to said first grooves; said first grooves and said second grooves forming a plurality of rasp teeth having a leading face substantially perpendicular to the surface of said insert, an oppositely disposed back side face transverse to the surface of said insert, a third side face substantially perpendicular to the surface of said insert, and a fourth side face; and each of said first grooves spaced apart a predetermined first index distance, and each of said second grooves spaced apart a predetermine second index distance different from said first index distance such that each of said rasp teeth have an elongated cutting edge.
Claim 26
Dependent Claim
164 words
A surgical rasp for smoothing and shaping bones, comprising: a handle; a tungsten carbide insert rigidly attached to said handle; said insert having a plurality of substantially parallel generally v-shaped first grooves substantially perpendicular to the longitudinal axis of said handle; said insert having a plurality of substantially parallel generally v-shaped second grooves oriented at a predetermined cut angle with respect to said first grooves; said first grooves and said second grooves forming a plurality of rasp teeth having a leading face substantially perpendicular to the surface of said insert, an oppositely disposed back side face transverse to the surface of said insert, a third side face substantially perpendicular to the surface of said insert, and a fourth side face; and each of said first grooves spaced apart a predetermined first index distance, and each of said second grooves spaced apart a predetermine second index distance different from said first index distance such that each of said rasp teeth have an elongated cutting edge.
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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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |