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US Patent: 949,107
Improvements in Pipe-Wrenches
Patentee:
James F. Wright - Canton, OH

USPTO Classifications:
81/106

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

Assignees:
None

Manufacturer:
A. Harvey's Sons Mfg. Co. Ltd - Detroit, MI
Wright Wrench Co. - Canton, OH

Witnesses:
Flossie E. Weidler
H. B. Webber

Patent Dates:
Applied: Jun. 22, 1909
Granted: Feb. 15, 1910

Patent Pictures: [ 1 | 2 ]
J. F. Wright Pat. Feb. 15, 1910
USPTO pdf tiff
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Description:
The spring which holds the quick-adjust frame against the rack in the main shank also allows the hook jaw to move to grip and release pipe. The design was improved upon by Wright's Jan. 10, 1911 patent (no. 981,234). This Feb. 1910 patent is cited in the markings on the A. Harvey's Sons Wright Wrench.

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