Fluid actuated orthopedic tool

Details Fluid actuated orthopedic tool Fluid actuated orthopedic tool

1983-04-18

1985-07-23

Pellegrino, Stephen C.

Surgery

Truss

Pad

604208, A61B 1732

Patent

active

045303576

ABSTRACT:
A fluid actuated orthopedic tool for cutting away degenerated or torn cartilage which includes a housing having a piston chamber in which a piston is reciprocally mounted and an associated head portion. The head portion includes an elongated tubular guide having a fixed cutter member connected thereto, and through which there extends a rotatable shaft having a movable cutter member connected thereto. The rotary shaft is driving connected by a pinion to a piston rack so that the displacement of the piston by fluid pressure and spring return effects the actuation of the movable cutter member to effect a cutting action. A lock is provided to lock the cutter members, and an internal adjustment is provided to adjust the stroke of the piston. Also, a valve means and associated actuator is provided to control the flow of actuating fluid to the piston chamber.

REFERENCES:
patent: 1002826 (1911-09-01), DeVilbiss
patent: 3712386 (1973-01-01), Peters
patent: 3752161 (1973-08-01), Bent
patent: 3842839 (1974-10-01), Malis et al.
patent: 3884238 (1975-05-01), O'Malley et al.
patent: 4433687 (1984-02-01), Burke et al.
patent: 4461305 (1984-07-01), Cibley

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