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:
Jul. 21, 2009
Filed:
Jun. 29, 2004
Seiji Fukui, Shimonoseki, JP;
Seiji Fukui, Shimonoseki, JP;
Shimano Inc., Osaka, JP;
Abstract
A bicycle chain wheel structure is configured with a right crank arm portion and an axle portion that are integrally formed together as a one-piece, unitary member. The right crank arm portion has an inner end integrally formed with the axle portion. The right crank arm portion has an outer end with a pedal mounting arrangement. The axle portion has a first end that is integrally formed with the right crank arm portion and a second end with a crank arm mounting arrangement. The axle portion has external threads disposed between the first and second ends of the axle portion. Thus, a portion of a bottom bracket is partially integrated into the bicycle chain wheel structure. Preferably, the chain guard is integrated into the right crank arm as a one-piece, unitary member. This arrangement reduces parts and manufacturing costs of the bicycle chain wheel structure.