Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 1,430,955
Wrench
Patentee:
Joseph J. Demers - Watertown, MA

USPTO Classifications:
81/101, 81/167, 81/DIG.3

Tool Categories:
wrenches : wrench components

Assignees:
Trimont Manufacturing Company - Boston, MA

Manufacturer:
Trimont Mfg. Co. - Roxbury, MA

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 23, 1921
Granted: Oct. 03, 1922

Patent Pictures: [ 1 | 2 ]
Joseph J. Demers patent Oct. 3, 1922, with 6 in TRIMO PAT. AP*D FOR nut wrench
USPTO Images
Google Patents
Report data errors or omissions
Description:
The main focus of the patent is the "U" shaped "nut guards" which are intended to prevent rubbing friction from turning the adjusting nut while the wrench is in use. It is a modification of the 1911 TRIMO nut guard patent (no. 1,012,036). The "U" shaped guards appear in TRIMO advertisements years before this patent. Some of these nut guards have the patent date stamped in, on a concealed surface that is only visible when the wrench is disassembled.

The wrench shown in the illustration is also stamped "ORD DEPT. USA" on the reverse side of the frame.

Copyright © 2002-2014 - DATAMP