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:
Jan. 03, 1989
Filed:
Apr. 09, 1987
Applicant:
Inventors:
Norbert Apfel, Waiblingen, DE;
Hans-Peter Stehle, Waiblingen, DE;
Ralf-Rainer Kemmler, Althutte, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B27B / ;
U.S. Cl.
CPC ...
30387 ; 30383 ;
Abstract
The guide bar for a motor-driven chain saw is provided for taking highest loading and is therefore made of solid material. For weight reduction, openings are provided in the guide bar which are closed off by cover plates that are flush with the flat sides of the guide bar. The cover plates are firmly joined to the base plate of the guide bar. By means of the hollow spaces inside the guide bar, a considerable weight reduction is attained, yet the stability of the guide bar is not substantially impaired as compared to a solid guide bar, since the hollow spaces are located in the zone that is neutral in terms of bending.