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US Patent: 5,218,891
Double-Ended Reversible Box Wrench with 71/2 Degree Swing Clearance
Patentees:
Gene E. Olson (exact or similar names) - Kenosha, WI
William T. Pagac (exact or similar names) - Kenosha, WI

USPTO Classifications:
81/124.3, 81/124.4, 81/125.1, 81/177.8

Tool Categories:
wrenches : nut wrenches

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

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Nov. 13, 1990
Granted: Jun. 15, 1993

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

Abstract

The double-ended reversible box wrench for use with a hexagonal fastener includes two box wrenching heads interconnected by a handle shank, with each head having a double-hexagonal socket opening therethrough, each of the outwardly directed corners of which has an axis extending through the center of the socket opening. One socket has a corner inclined at an offset angle of 33/4 degrees to the shank axis and the other socket has a corner inclined at an offset angle of 111/4 degrees to the shank axis so that, by sequential application of the four wrench faces to a hexagonal fastener, the fastener maybe repeatedly rotated in the same direction while the wrench undergoes a swing of no more than 71/2 degrees during any one application. A wrench with offset angles of zero degrees and 10 degrees and a pivoting head wrench are also disclosed.

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