Utility knife

Details Utility knife Utility knife

1986-02-18

1988-08-09

Watts, Douglas D.

Cutlery

Sheathed

Sliding blade

30 402, 30125, 30335, B26B 108

Patent

active

047618825

ABSTRACT:
A retractable utility knife comprises a handle having a front portion and a rear portion, a blade carrier slideably mounted in a passageway in the front portion of the handle for positioning a blade in retracted-protected, exposed-cutting, or advanced attachment-detachment positions, with the passageway extending to the front portion of the handle a sufficient distance to position a forward mounting lance of the blade carrier outside the handle to free the blade for detachment from the mounting lance by grasping the front portion of the blade and lifting it off the carrier. A blade magazine for replacement blades is provided in the rear portion of the handle and has a top wall with a finger opening smaller than a blade, a spring-biased pusher member mounted in the blade magazine to push the replacement blades toward the top wall so that the top blade is flush against the top wall, a transverse slot extending downwardly from the top wall for sliding a replacement blade into or out of the magazine and guard apparatus positioned in the rearward path of the top blade in the magazine for preventing accidental removal of the top blade from the magazine.

REFERENCES:
patent: 2776743 (1957-01-01), Treiss
patent: 3316635 (1967-05-01), Merrow
patent: 3577637 (1971-05-01), Braginetz
patent: 3708881 (1973-01-01), Bennett
patent: 3879847 (1975-04-01), Roll
patent: 4586256 (1986-05-01), Weimann

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