Utility knife

Details Utility knife Utility knife

1992-05-21

1993-01-05

Watts, Douglas D.

Cutlery

Holders for detachable blades

7158, 51159, 81 922, B26B 100, B26B 1100, B24B 348, B43K 500

Patent

active

051759349

ABSTRACT:
A utility knife switchable between a non-rotatable mode for cutting a straight line and a rotatable mode for cutting a curved line includes a rod which engages to a blade at one end and the other end being rotatably positioned against a bearing device thereby providing the blade with a rotation axle for cutting a curve. A switching button device is installed above the limiting device for forcing the rod and the blade to work in a non-rotatable mode or a rotatable mode.

REFERENCES:
patent: 2569286 (1951-09-01), Bunker
patent: 2934994 (1960-05-01), Casselman
patent: 3176395 (1965-04-01), Warner et al.
patent: 3706106 (1972-12-01), Leopoldi
patent: 4092073 (1978-05-01), Anderson
patent: 4665912 (1987-05-01), Burton
patent: 4862772 (1989-09-01), Piperato

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