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:
Mar. 04, 2008
Filed:
Jan. 19, 2005
Masanori Sugimoto, Sayama, JP;
Masanori Sugimoto, Sayama, JP;
Shimano Inc., Osaka, JP;
Abstract
A bicycle drive unit is disclosed that includes a case frame, crank shaft, front sprocket, rear hub shaft and rear sprocket. The crank shaft includes first and second support portions that are spaced apart from one another and are supported on opposite lateral sides of a forward portion of the case frame. The first and second support portions are engaged with bearings supported on opposite sides of the interior of the case frame. The front sprocket is installed on the crank shaft within the case frame and between the first and second support portions. The rear hub shaft includes a third and fourth supporting portions that are spaced apart from one another with the rear sprocket installed on the rear hub shaft therebetween.