Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 256,867
Wrench
Improved Monkey Wrench
Patentee:
John Thomson - Brooklyn, NY

USPTO Classifications:
81/157, 81/DIG.6

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
James Whitford
G. W. King
Lyman H. Essex
Robert K. Powers

Patent Dates:
Applied: Mar. 15, 1882
Granted: Apr. 25, 1882

Patent Pictures:
John Thomson patent April 24, 1882
USPTO pdf tiff
Google Patents
Report data errors or omissions
Description:
A leaf spring behind the adjusting screw pushes the screw against matching semi-circular threads in the movable jaw. Pushing the adjusting screw in toward the wrench shanks releases the threads and allows for quick adjustment.

Copyright © 2002-2019 - DATAMP