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US Patent: 562,112
Wrench
Patentee:
Michael W. Ansterburg - Homer, MI

USPTO Classifications:
81/145, 81/180.1

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

Assignees:
None

Manufacturer:
Elyria Variety Works - Jackson, MI

Witnesses:
Marian J. Longyear
Walter S. Wood
W. A. Lane
Charles D. Burt

Patent Dates:
Applied: Aug. 24, 1895
Granted: Jun. 16, 1896

Patent Pictures: [ 1 | 2 ]
Michael W. Ansterburg patent June 16, 1896
USPTO pdf tiff
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Description:
Wrench with spring-loaded gripping block in movable jaw that engages rack teeth on the shank. Known examples marked with patent date are set up as pipe wrenches. The specifications note the adjustment would work for either pipe or nut wrenches.

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