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. 27, 1976
Filed:
Sep. 27, 1974
Lyle M Forsgren, Fond Du Lac, WI (US);
Brunswick Corporation, Skokie, IL (US);
Abstract
A snowmobile drive track assembly includes an endless belt unit having a central drive belt section and laterally spaced belt sections interconnected by flat, spring-steel track bars. The several sections include longitudinally aligned ground-engaging drive ribs holding the bars in spaced relation to the ground. The bars are molded into the outer surface of the ground engaging side of the belt immediately adjacent the wall of the depending snow engaging ribs. The bar extends essentially completely throughout the width of the three sections with the undersurface completely exposed and drive lugs provided on the backside of the central section. The exposure of the bars on the outer side of the track unit essentially throughout the complete width of the track unit significantly increases the heat dissipating characteristics of the belt unit. The belt is suitably reinforced by embedding of nylon fabric and longitudinal cords. The track bars are suitably treated, prior to molding to provide adherence to the interconnecting rubber which may, however, be readily loosened for removal of a bar by use of a suitable solvent such as methol-ethyl ketone.