Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 270,741
Pipe Wrench
Friederich Cajar - New York, NY

USPTO Classifications:
81/102, 81/127, 81/186

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : self-adjust wrenches


Not known to have been produced

C. Sedgwick
O. H. Beyer
Oscar F. Gunz
Edgar Tate

Patent Dates:
Applied: Dec. 01, 1882
Granted: Jan. 16, 1883

Patent Pictures:
Friederich Cajar patent January 16, 1883
USPTO pdf tiff
Google Patents
Report data errors or omissions
The teeth on the handle move the the adjustable jaw as the handle is swung. The patent includes the slip-on jaw cover to enable the wrench to work with nuts as well as pipe. There is also a provision to use a locking pin to limit the range of movement, thereby adjusting the tool to a limited size range.

Copyright © 2002-2019 - DATAMP