Retractable scalpel with blade-activated lock

Details Retractable scalpel with blade-activated lock Retractable scalpel with blade-activated lock

1991-09-05

1993-11-02

Burr, Edgar S.

Surgery

Instruments

Cutting, puncturing or piercing

30162, A61F 216

Patent

active

052580016

ABSTRACT:
In accordance with illustrative embodiments of the present invention as disclosed herein, a retractable blade knife particularly adapted for use as a surgical scalpel or the like includes a thin metal blade positioned in a cavity inside a handle and being movable between an extended position and a retracted position. In the extended position the blade is releasably locked to the handle in response to resilience of the blade caused by flexure thereof from its relaxed condition. In one embodiment the relaxed state of the blade is slight curved, and in another embodiment, such state is substantially flat. A shoulder that locks the blade in extended position is released by pressing on a pin that extends through a slot in the handle, and the pin, also is used to shift the blade longitudinally.

REFERENCES:
patent: 1449408 (1923-03-01), Hull
patent: 1960130 (1934-05-01), Trubel
patent: 3906626 (1975-09-01), Riuli
patent: 4089112 (1978-05-01), Richards
patent: 4233734 (1980-11-01), Bies

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