Process for shaping and sharpening a rotatable surgical shaver b

Details Process for shaping and sharpening a rotatable surgical shaver b Process for shaping and sharpening a rotatable surgical shaver b

1997-07-31

1998-11-10

Buiz, Michael

Surgery

Instruments

Cutting, puncturing or piercing

606170, 128898, A61B 1732

Patent

active

058337024

ABSTRACT:
A process for simultaneously shaping and sharpening a cutting widow at the distal end of a tubular member of a rotary blade assembly. The assembly is provided with a stationary elongated outer tube, having a cutting window at its distal tip and includes a rotatable elongated inner tube having a cutting means at its distal tip. The window in the outer tube has a curvilinear profile defined by a peripheral rim surrounded entirely by a land surface which is inclined relative to the rim. The inclination of the land produces an area which tapers from a full thickness, where the land is adjacent to the cylindrical wall of the outer tube, to a sharp edge around the periphery of the window. The curvilinear window is produced by a manufacturing process which creates the window opening with a sharpened periphery at the same time that the land surrounding the opening is inclined. A preferred embodiment utilizes electrochemical grinding of the distal ends of the tubular member by a tool having a rotatable wheel with a perimeter in the shape of a groove of predetermined arcuate profile.

REFERENCES:
patent: 5364395 (1994-11-01), West, Jr.
patent: 5601583 (1997-02-01), Donahue et al.
patent: 5630826 (1997-05-01), Sastri

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