Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 389,400
Wrench
Patentee:
Edward C. Mead - Elkhart, IN

USPTO Classifications:
408/240, 81/171

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches
wrenches : tap wrenches and die stocks

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
F. L. Middleton
Walter Donaldson
John M. Monschein
Orville T. Chamberlain

Patent Dates:
Applied: Feb. 29, 1888
Granted: Sep. 11, 1888

Patent Pictures:
Edward C. Mead patent September 11, 1888
USPTO pdf tiff
Google Patents
Report data errors or omissions
Description:
A screw-adjusted sliding block adjusts the size of the opening. The adjusting screw has perimeter holes for a nail or wire to serve as a lever handle. A stiff spring is inserted between the sliding jaw and adjusting screw. The spring is intended to exert constant pressure and keep the jaws in contact with the work piece. The specifications describe this as a tap wrench.

Copyright © 2002-2019 - DATAMP