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US Patent: 991,681
Carriage wrench
Chester A. Winchenbach - Waldboro, ME

USPTO Classifications:
76/5.4, 81/147, 81/384, 81/391, 81/426.5

Tool Categories:
wrenches : axle nut wrenches


Chester A. Winchenbach - Waldboro, ME

M. L. Palmer
Ett Curtis
E. S. Crowell
C. H. Curtis

Patent Dates:
Applied: Aug. 15, 1910
Granted: May 09, 1911

Patent Pictures: [ 1 | 2 ]
Chester A. Winchenbach Patent May 9, 1911
USPTO pdf tiff
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The outer jaw segment is adjustable. It has teeth that engage rack teeth cut in the wrench frame. The inner jaw pivots. It is moved by the auxiliary lever. The wrench frame and lever are made of bent flat iron. Known example marked only with the patent date.

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