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US Patent: 641,451
Wrench
Patentee:
William T. Hatten - Canyon City, OR

USPTO Classifications:
81/152

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. B. Guernsey
R. R. McHaley
Ralph A. Shepard
H. F. Riley

Patent Dates:
Applied: May 18, 1899
Granted: Jan. 16, 1900

Patent Pictures:
William T. Hatten patent January 16, 1900
USPTO pdf tiff
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Description:
The focus of the patent is the adjustment holding mechanism on the movable jaw. This patent and Frank W. Dent's January 7, 1902 patent (no. 690,407) were used in the Clutch Wrench Co, Waukesha, Wisconsin adjustable wrench.

Corresponding Canadian patent no. CA-67,634 lists Hatten and Chester E. Guernsey as patentees, and includes a pipe wrench version of the design.

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