Gardening shears having energy-saving function

Details Gardening shears having energy-saving function Gardening shears having energy-saving function

2011-03-01

2011-03-01

Choi, Stephen (Department: 3724)

Cutlery

Cutting tools

Plural cooperating blades

C030S192000

Reexamination Certificate

active

07895757

ABSTRACT:
A pair of gardening shears include a first cutting blade, a second cutting blade, and two extension arms. The second cutting blade has a first portion pivotally mounted on the first portion of the first cutting blade by a pivot bolt. Each of the extension arms has a first portion pivotally mounted on the mediate portion of the second cutting blade and a mediate portion movably mounted on the second portion of the first cutting blade by a guide pin. Thus, when the first cutting blade is driven by the extension arms to pivot toward the second cutting blade, the guide pin is movable outwardly relative to the pivot bolt to increase a length between the guide pin and the pivot bolt to increase the force arm length and to produce a larger cutting force by the leverage action.

REFERENCES:
patent: 3336668 (1967-08-01), Groom
patent: 5809654 (1998-09-01), Huang
patent: 6681492 (2004-01-01), Huang
patent: 2009/0044412 (2009-02-01), Hsieh
patent: 2444912 (2008-05-01), None

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