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US Patent: 581,267
Wrench
Patentee:
Daniel A. Cheney (exact or similar names) - Central Park, MT

USPTO Classifications:
81/143

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Eugene Ashley
Arthur Ashley
John T. McLellan
Clyde Corbly

Patent Dates:
Applied: Mar. 19, 1896
Granted: Apr. 27, 1897

Patent Pictures:
Daniel A. Cheney patent April 27, 1897
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Description:
A cam lever on the movable jaw forces a plate with gripping teeth to mesh with rack teeth on the main shank to hold the adjustment. The cam lever and gripping plate are interconnected so that releasing the cam lifts the plate to prevent wear on the teeth as the jaw moves.

Improved by patent no. 611,771.

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