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US Patent: 24,175
Improved Gripping Wrench
Henry J. Behrens - New York, NY

USPTO Classifications:
81/171, 81/97

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

Charles S. Pomeroy - New York, NY

Not known to have been produced

William P. Chambers
Garret D. King

Patent Dates:
Granted: May 24, 1859

Patent Pictures:
Henry J. Behrens Pat. May 24, 1859
USPTO pdf tiff
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The adjusting screw is on a hinged base; the movable jaw can slide, so that the gripping power increases as the pull on the wrench handle increases. The description contrasts this gripping action with those of Hyde (pat. No. 12510) and Foster (pat. no. 22947).

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