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US Patent: 453,736
Rod or Pipe Wrench
Patentee:
Michael Cummins (exact or similar names) - Leadville, CO

USPTO Classifications:
269/215, 81/103, 81/134, 81/145

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
W. S. Duvall
H. G. Seitz
T. N. McCormick
J. F. Lewis
Patent Dates:
Applied: Sep. 23, 1890
Granted: Jun. 09, 1891

Patent Pictures:
Michael Cummins patent June 9, 1891
USPTO (New site tip)
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Description:
Adjustment mechanism of rack, pawl and springs in a rocking frame to allow one-handed operation.

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