Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 446,143
Wrench
Patentee:
John Mattan (exact or similar names) - Cincinnati, OH

USPTO Classifications:
269/238, 81/13

Tool Categories:
wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
G. A.W. Paver
K. Smith
F. W. Browne

Patent Dates:
Applied: Sep. 09, 1889
Granted: Feb. 10, 1891

Patent Pictures:
John Mattan patent February 10, 1891
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Stan Schulz
Description:
The gripping jaws are designed to reach countersunk bolt heads. The design shown in the drawings has flared ends loosely pivoted in the handle bar so the jaws can be driven into timbers surrounding a countersunk bolt head. The jaws are clamped onto the bolt head by a ratchet-driven connecting screw. The ratchet is reversible.

Copyright © 2002-2024 - DATAMP