Surgical rasp and method of manufacture
AssigneeSnowden-Pencer, Inc.
InventorsJohn A. Davison, Robert J. Kellar
Life of this patent
Estimating the term…
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.
Claims22
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.
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.
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.
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.
Dependencies are inferred from the claim text.