The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 2000
Filed:
Oct. 18, 1999
Applicant:
Inventors:
Christopher David Seigneur, West Linn, OR (US);
Duane M Gibson, Milwaukie, OR (US);
Assignee:
Blount, Inc., Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A01G / ; B23B / ;
U.S. Cl.
CPC ...
37302 ; 144-41 ; 144 341 ; 30387 ;
Abstract
A chain saw guide bar for a tree harvester is arranged to yield when an excessive force is applied such as when the guide bar becomes jammed in a cut. Yielding of the guide bar protects the bar holder from damage. The guide bar is heat treated or otherwise structurally modified to provide the desired yield strength.