Knife

Details Knife Knife

1992-04-30

1993-04-20

Yost, Frank T.

Cutlery

Sheathed

Sliding blade

30162, 30355, B26B 306

Patent

active

052030857

ABSTRACT:
A safety utility knife has a weighted pawl which, upon a slip of the knife, disengages from a blade holder to allow the latter to be retracted by a spring. The tooth of the blade holder engages the blocking surface of the pawl with only line or point contact and the blocking surface itself is tangential to a circle centered on the pawl pivot axis. The pawl spring is a coil spring extending in the direction of displacement of the blade holder and generally corresponds to the retraction spring.

REFERENCES:
patent: 1623906 (1927-04-01), Brooks
patent: 3999290 (1976-12-01), Wood
patent: 4769912 (1988-09-01), Davis

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