Cutlery – Cutting tools – Plural cooperating blades
Patent
1998-12-31
1999-12-07
Watts, Douglas D.
Cutlery
Cutting tools
Plural cooperating blades
30249, B26B 1300
Patent
active
059962321
ABSTRACT:
A tree pruner consists of a fixed tool and a movable tool fastened pivotally with the fixed tool which is fastened at the lower end thereof with the top end of a support rod. The support rod is provided at the bottom end thereof with two handles for controlling the operation of the fixed tool and the movable tool. The movable tool has an action portion and a blade portion. The action portion is provided with a slide slot having a plurality of arcuate grooves. The fixed tool is fastened pivotally with a rocking arm which is provided at the top end thereof with two support arms. One of the two support arms is provided with a tensile spring which is connected with the fixed tool. Other one of the two support arms is provided with a pull cord which is connected with the handles. The rocking arm is fastened pivotally at the midsegment thereof with one end of a connection rod. Other end of the connection rod is movably disposed in the slide slot of the action portion of the movable tool. The pull cord is activated by the two handles such that the rocking arm and the connection rod are actuated so as to cause the movable tool to turn to sever the twig of a tree.
REFERENCES:
patent: 1378791 (1921-05-01), Johanson
patent: 4442603 (1984-04-01), Wallace et al.
patent: 5743018 (1998-04-01), Wang
patent: 5745998 (1998-05-01), Le et al.
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