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US Patent: 497,260
Pipe Wrench
George P. Woelfel - Spring Garden, PA

USPTO Classifications:
81/186, 81/90.1, 81/97, 81/99, 81/DIG.6

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches
wrenches : pipe wrenches


Bindley Automatic Wrench Company - Pittsburgh, PA

J. A. Herron
M. E. Harrison
Jas. J. McAfee

Patent Dates:
Applied: Jan. 31, 1893
Granted: May 09, 1893

Reissue Information:
Reissued as RE11,459 (Dec. 18, 1894)

Patent Pictures:
George P. Woelfel patent May 9, 1893
USPTO pdf tiff
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The spring allows the jaws to adjust to different pipe sizes, and to alternately grip and release pipe as the handle is moved in one direction or the other.

Ken Cope's "American Wrench Makers 1830-1930" cites an IRON AGE listing for the manufacturer, and notes the patent reissue.

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