Safety utility knife

Details Safety utility knife Safety utility knife

1977-04-26

1978-05-30

Jones, Jr., James L.

Cutlery

Cutting tools

With guard and/or guide

30151, 30293, 30294, B26B 2900

Patent

active

040915379

ABSTRACT:
A hand-held safety utility knife having an elongated shaped handle within which a replaceable cutting blade is securely retained, wherein the knife assembly is also provided with a compression-extension spiral spring loaded retractable blade guard that is mechanically cooperative with the cutting blade of the knife and manually activated for retraction by depressing a compression-extension spiral spring loaded trigger thereby enabling cutting utility of the blade in use application, and upon manual trigger release after use application provides non-use safety locking of the guard with respect to the utility knife cutting blade.

REFERENCES:
patent: 142942 (1873-09-01), Ratelle
patent: 705441 (1902-07-01), Putney
patent: 1813868 (1931-07-01), Smiroldo
patent: 2293892 (1942-08-01), Evinger
patent: 2644230 (1953-07-01), Anderson
patent: 2784489 (1957-03-01), Reise
patent: 2788574 (1957-04-01), Marcmann
patent: 3943627 (1976-03-01), Stanley

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