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US Patent: 540,409
Pipe Wrench
Patentee:
Edward J. Stone (exact or similar names) - Waverly, PA

USPTO Classifications:
30/190, 81/365, 81/366, 81/391

Tool Categories:
wrenches : pliers type wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
M. M. Morton
Jas. B. Clarke
Pardon B. Stone
Dexter Sinsabaugh

Patent Dates:
Applied: Mar. 07, 1895
Granted: Jun. 04, 1895

Patent Pictures:
Edward J. Stone patent June 4, 1895
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Description:
Adjustable tongs type; the lever handle has gear teeth that engage rack teeth on the back of the movable jaw. The relative location of the point of engagement changes with the distance between the gripping jaws. A spring holds the lever handle in contact with the movable jaw.

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