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:
Oct. 31, 1989
Filed:
Mar. 18, 1988
Eugene E Calkins, Salem, OR (US);
Michael V Petrovich, Portland, OR (US);
Blount, Inc., Portland, OR (US);
Abstract
A sprocket assembly including a sprocket adapter driven by the motor of a chain saw. The adapter includes an adapter shaft which has a defined inner opening to fit around the drive shaft of the chain saw. A sprocket is mounted on the adapter shaft. Splines on the adapter shaft exterior fit into spline grooves of the sprocket. The thickness at the roots of the splines provide the strength to resist breakage. The exterior areas of the adapter shaft between the splines are flat landings which define relieved thickness areas between the splines and are aligned with tang-receiving pockets in the sprocket. The relieved areas permit an optimum sizing of the sprocket to the saw chain with sufficient pocket depth to fully receive the drive tangs of a saw chain. The sprocket rims are provided with mated inner edges that mate to the flat landings of the adapter shaft to facilitate transmission of the turning power from the drive shaft.