Medical instrument for removing bone

Details Medical instrument for removing bone Medical instrument for removing bone

1986-07-02

1988-03-29

Rosenbaum, C. Fred

Surgery

Truss

Pad

128305, 128319, 30278, A61B 1716

Patent

active

047336633

ABSTRACT:
There is provided an improved rongeur having a jaw mechanism comprised of a barrel member having a honed cutting edge on one extremity thereof and having a shaft member located within and arranged for reciprocal motion. On the shaft member there is provided a plate member attached at one extremity to trap bone against the cutting edge. A lever mechanism is provided having paired handle levers joined by a pivot and having the barrel and shaft member attached to the handle levers between the handle portion and the pivot. On the shaft member there is further provided a cavity arranged to slide within the barrel progressively as the cutting operation proceeds, gradually drawing severed bone within the capturing cavity. Stop surfaces are located in the cutting area at a position relative to the cutting edge to avoid direct force contact on the cutting edge when the shaft member is reciprocated to its full extent within the barrel member.

REFERENCES:
patent: 2709298 (1955-05-01), Mater
patent: 3936935 (1976-02-01), Gregory
patent: 4201213 (1980-05-01), Townsend
patent: 4513745 (1985-04-01), Amoils
patent: 4530356 (1985-07-01), Helfgott
patent: 4559041 (1985-12-01), Razi

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