Pliers

Details Pliers Pliers

1988-12-20

1990-01-09

Yost, Frank T.

Cutlery

Cutting tools

Plural cooperating blades

30251, B26B 1700

Patent

active

048918830

ABSTRACT:
The invention relates to a pair of surgical pliers for the cutting through of wires (14), screws or the like comprising a cutter gripping lever (1) having a cutting edge (15) at its front end and a handle (13) at its rear end, and a cutting lever (2) pivotally connected to the cutter gripping lever by means of a cutting lever hinge (3) with the cutting lever having a second cutting edge (15') disposed opposite to the first cutting edge (15). A gripping lever (4) is also pivotally connected to the cutter gripping lever (1). A transmission is arranged between the gripping lever (4) and the cutting lever (2). The input drive member (6) of the transmission braced against the cutter gripping lever (1) is loaded by the gripping lever whereas the output drive member (11) of the transmission acts on the cutting lever (2) at the side remote from the cutting edge (15) of the cutting lever hinge (3) which connects the cutting lever (2) to the cutter gripping lever (1). In this way the same relative pivotal movements of the gripping lever (4) relative to the cutter gripping lever (1) bring about a pivotal movement of the cutter lever (2) relative to the cutting gripping lever (1) which becomes smaller as the distance b between the gripping lever (4) and the cutter gripping lever (1) becomes smaller, so that the mechanical advantage automatically increases as this distance b becomes smaller.

REFERENCES:
patent: 1046771 (1912-12-01), Goodnow
patent: 1354843 (1920-10-01), Province
patent: 3170345 (1965-02-01), Poingt

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