Knife

Details Knife Knife

1988-12-29

1990-08-21

Watts, Douglas D.

Cutlery

Sheathed

Sliding blade

30161, 30286, B26B 306

Patent

active

049494589

ABSTRACT:
A knife of the kind having a blade (14, 43) and a handle has an extendible and retractable blade edge guard (16, 45). When the blade (14, 43) is extended, any violent movement of the knife with the cutting edge in a leading attitude acts inertially to disengage a detent (27, 55) from a recess (28, 57) in the guard (16, 45) so that a tension spring (17, 46) quickly extends the guard (16, 45) into its projecting, operative position to guard the blade edge (21, 50) and prevent at least serious injury. When the blade carrier (13, 42) is fully retracted, its engagement with a part (31, 58) of the guard (16, 45) causes that also to retract and be engaged again by the detent (27, 55) due to spring-bias.

REFERENCES:
patent: 2474609 (1949-06-01), Wolf
patent: 2607987 (1952-08-01), Bethenhausen
patent: 3999290 (1976-12-01), Wood
patent: 4091537 (1978-05-01), Stevenson, Jr.
patent: 4209900 (1980-07-01), Gilbert
patent: 4393587 (1983-07-01), Kloosterman
patent: 4586256 (1986-05-01), Weimann

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