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:
Feb. 19, 2013
Filed:
Aug. 30, 2010
Eigo Kuroiwa, Sakai, JP;
Masahiro Yamanaka, Sakai, JP;
Eigo Kuroiwa, Sakai, JP;
Masahiro Yamanaka, Sakai, JP;
Shimano Inc., Osaka, JP;
Abstract
A bicycle crank assembly is provided with a crank arm including a front side surface and a back side surface. The crank arm has a crank axle mounting portion with a crank axle receiving opening defined by an axle coupling structure. The axle coupling structure at least includes a plurality of full length splines and at least one short spline. The full length splines extends completely in an axial direction of the crank axle receiving opening from a first axial end edge to a second axial end edge. The short spline extends in the axial direction with a truncated end positioned adjacent one of the first and second axial end edges such that the at least one short spline does not extend completely from the other of the first and second axial end edges to the one of the first and second axial end edges.