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US Patent: 2,765,690
Claw and Lever Actuated, Slidable Side Jaw Wrench
Patentee:
Eugen Mayer - Stuttgart, Germany

USPTO Classifications:
81/127, 81/165

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Unknown

Witnesses:
none listed

Patent Dates:
Applied: Jun. 12, 1953
Granted: Oct. 09, 1956

Patent Pictures:
Eugen Mayer patent October 9, 1956 with 10 inch BESSEY - Don Ervin collection
USPTO pdf tiff
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Description:
The jaw adjusts to size by an adjusting knurl. The knurl shares its axle with a sliding block. The block has a notch which engages with a lug on the pivoting handle. Springs at both ends of the axle keep the sliding block and adjusting knurl in contact, and tend to move the adjustable jaw "closed." In use, the rocking motion of the head in relation to the handle allows the jaws to open sufficiently for "ratchet" action on hexagonal nuts.

Produced as the BESSEY.

The specifications cite one British patent and U.S. patents 573,070, 1,171,939, 1,371,679, 1,523,808, and 2,562,060 as references.

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