Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 120,947
Improvement in Duplex Wrenches
Patentee:
Augustus Ball Davis - Philadelphia, PA

USPTO Classifications:
81/178, 81/93

Tool Categories:
wrenches : wrench components : wrench jaw components
wrenches : pipe and nut combination wrenches

Assignees:
None

Manufacturer:
Philadelphia Tool Co. - Philadelphia, PA

Witnesses:
John Parker
Wm. A. Steel
Frank B. Richards

Patent Dates:
Granted: Nov. 14, 1871

Patent Pictures:
A. B. Davis Pat. Nov. 14, 1871
USPTO pdf tiff
Google Patents
Report data errors or omissions
Description:
The improvement in this patent is a reversible hardened toothed plate for either the flat or beveled jaw on the pipe wrench side of the wrench. It is an improvement on Davis' previous patents (nos. 94,085 and 106,129).

Known examples of Davis' Duplex Wrench do not include this separate piece with teeth.

Copyright © 2002-2017 - DATAMP