Pruning hook having an energy-saving function

Cutlery – Cutting tools – Plural cooperating blades

Reexamination Certificate

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Details

C030S245000

Reexamination Certificate

active

08046925

ABSTRACT:
A pruning hook includes an extension shank, a blade unit including a fixed blade mounted on the extension shank and a movable blade pivotally connected with the fixed blade, a driving cord to drive the movable blade, a slide movably mounted in the extension shank to drive the driving cord, a pull cord mounted in the extension shank to drive the slide, and a pulling member movable relative to the extension shank to drive the pull cord. Thus, the pulling member is pulled by a user's arm to drive the blade unit so that the blade unit is driven by a greater force applied by the user's arm and has a larger shearing force to perform a cutting action in an easier manner so as to cut a larger object easily and conveniently.

REFERENCES:
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patent: 2744322 (1956-05-01), Gustafson
patent: 3715805 (1973-02-01), Fraser
patent: 5933965 (1999-08-01), Linden et al.
patent: 5950315 (1999-09-01), Linden
patent: 6178644 (2001-01-01), Le et al.
patent: 6345445 (2002-02-01), Schofield
patent: 7658011 (2010-02-01), Shan
patent: 2010/0192385 (2010-08-01), Pittau
patent: 2010/0299938 (2010-12-01), Wu
patent: 2010/0299939 (2010-12-01), Wu
patent: 2011/0016730 (2011-01-01), Wu
patent: 2011/0107606 (2011-05-01), Shan
patent: 2011/0113635 (2011-05-01), Lee et al.

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