Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 1,293,734
Pipe Wrench
William S. Du Charme - Cleveland, OH

USPTO Classifications:

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


Efficient Vise and Wrench Co. - Cleveland, OH

S. W. Brainard
John A. Bommhardt
G. W. Rosenberg

Patent Dates:
Applied: Sep. 27, 1918
Granted: Feb. 11, 1919

Patent Pictures: [ 1 | 2 ]
William S. Du Charme Pat. February 11, 1919
USPTO Images
Google Patents
Report data errors or omissions
The wrench has an alligator-jaw type action with teeth on the fixed jaw, and a smooth surface on the movable jaw. The movable jaw is held by rack teeth on the back of the main bar and a compression spring inside the jaw.

An ad in the Febr. 15, 1921 PLUMBER'S TRADE JOURNAL notes five sizes in production.

Copyright © 2002-2016 - DATAMP