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US Patent: 438,243
Wrench
Patentee:
Herman Scheatzka - Bothell, WA

USPTO Classifications:
81/360, 81/77

Tool Categories:
wrenches : pipe and nut combination wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. J. Jacobs
Louis Henry Legg

Patent Dates:
Applied: Nov. 30, 1889
Granted: Oct. 14, 1890

Patent Pictures:
Herman Scheatzka patent October 14, 1890
USPTO pdf tiff
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Description:
Double ended nut and pipe combination wrench. The movable jaw is held in position on the shank by a cam lever which clamps teeth on the interior face of the movable jaw frame to teeth on the shank of the wrench.

Corresponding Canadian patent no. CA-36,201 was granted March 21, 1891.

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