Ratchet scissors

Details Ratchet scissors Ratchet scissors

2006-10-31

2006-10-31

Eley, Timothy V. (Department: 3724)

Cutlery

Pipe and rod cutters

C030S098000, C030S099000, C030S251000

Reexamination Certificate

active

07127819

ABSTRACT:
Provided is scissors comprising a movable first handle unit; a stationary second handle unit including a bifurcated jaw, a pivotal blade in the jaw, a spring biased pivotal plate member in the jaw and including teeth, a gear and ratchet wheel assembly, and a spring biased pivotal pawl; and a spring biased lever including a pawl member engaged with the ratchet wheel. Continuously pivoting the first handle unit about the second handle unit by moving the first handle unit alternately back and forth in each action of pivoting the first handle unit toward the second handle unit will pivot the first and second protrusions counterclockwise, rotate the gear and ratchet assembly clockwise, and pivot the teeth counterclockwise to cut a pipe anchored in the mouth.

REFERENCES:
patent: 4094064 (1978-06-01), Nishikawa et al.
patent: 4176450 (1979-12-01), Muromoto
patent: 4178682 (1979-12-01), Sadauskas
patent: 5184404 (1993-02-01), Chen
patent: 5231763 (1993-08-01), Laux
patent: 6481105 (2002-11-01), Haung

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