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US Patent: 647,937
Pipe Wrench
Patentee:
Porte M. Bradley - Cripple Creek, CO

USPTO Classifications:
81/105, 81/185.2, 81/DIG.6

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. E. Brock
W. C. Lunsford
H. A. Reese
Fred H. Harding

Patent Dates:
Applied: Jan. 20, 1900
Granted: Apr. 24, 1900

Patent Pictures:
Porte M. Bradley patent April 24, 1900
USPTO pdf tiff
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Description:
The patented features include the angled jaw on the main shank, the spring that pushes the movable jaw toward the fixed jaw, the circular "block" for the adjusting nut, and the circular enlargement for that "block."

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