Pliers-type hand tool

Details Pliers-type hand tool Pliers-type hand tool

1983-04-08

1986-02-11

Schmidt, Frederick R.

Tools

Tool jaw

Jaw-actuating means

81348, 81349, 81351, 81363, 81367, B25B 712

Patent

active

045692602

ABSTRACT:
A pliers-type hand tool has a pair of pivotally connected jaw-forming members defining jaw portions on one side of the pivot connection and elongate slotted lever portions on the other side of the pivot connection. A slide pin is received in the lever portion slots and is connected by pivot links to operating handles which are attached to the pivot connection in common with the jaw-forming members. The arrangement produces a mechanical advantage between the handles and the jaw-forming members allowing a greater jaw-closing force to be developed, related to the manual effort applied to the handles, than with conventional pliers-type tools of comparable size.

REFERENCES:
patent: 146829 (1874-01-01), Lindsay
patent: 509920 (1893-12-01), Lindsay
patent: 832804 (1906-10-01), O'Neal et al.
patent: 1586297 (1926-05-01), DuBois
patent: 1860290 (1932-05-01), Lebherz
patent: 2035686 (1936-03-01), Briegel
patent: 2992576 (1961-07-01), Evans et al.
patent: 3091841 (1963-06-01), Wurzel
patent: 3422708 (1969-01-01), Bieganski

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