US Patent: 850,254 - Pipe Wrench


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US Patent: 850,254

Pipe Wrench

Patentee:

Edward J. Robbins (exact or similar names) - Boston, MA

USPTO Classifications:

81/106, 81/170, 81/177.1

Tool Categories:

wrenches : pipe wrenches

wrenches : wrench adjustment types : screw adjust wrenches

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Frank G. Parker

A. K. Hood

Henry W. Williams

Patent Dates:
Applied:	Apr. 24, 1906
Granted:	Apr. 16, 1907

Patent Pictures:

Edward J. Robbins patent April 16, 1907

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Description:

An internal screw attached to the sleeve at the end of the handle sets the size adjustment of the movable jaw. A leaf spring helps hold the jaws open.