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US Patent: 5,220,856
Pivotal Hand Tool and Pivot Joint Therefor
Patentees:
Daniel M. Eggert - Kenosha, WI
Jeffrey H. Hoff - Kenosha, WI
Bert Krivec - Waukesha, WI
Frank Mikic - Kenosha, WI
Christopher D. Thompson - Milwaukee, WI

USPTO Classifications:
30/254, 81/416

Tool Categories:
pliers

Assignees:
Snap-On Tools Corp. - Kenosha, WI

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: May 07, 1991
Granted: Jun. 22, 1993

Patent Pictures:
USPTO pdf tiff
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Snap-On Tools Company History
Description:
Emrich & Dithmar - patent attorneys

Abstract

A pivotal hand tool includes first and second lever members which intersect and have aligned openings therethrough in which is received a pivot pin having an enlarged head at one end adjacent to one of the lever members and having the other end thereof welded to the other lever member or to a flat washer which bears against the other lever member. The head and the flat washer may be received in complementary recesses in the lever members. A frustoconical washer may be disposed beneath the head of the pivot pin for resiliently urging the lever members together.

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