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:
Sep. 12, 2017
Filed:
Jul. 16, 2013
Panasonic Intellectual Property Management Co., Ltd., Osaka-shi, Osaka, JP;
Masafumi Kawakami, Nara, JP;
Abstract
Provided is an electric assist bicycle that can apply a sufficient auxiliary driving force with a satisfactory gear change, preclude problems caused by interference between a mount or a battery and a front derailleur, and prevent a reduction in torque transmission efficiency. A cylindrical human-power transmission member that receives a transmitted human driving force is disposed on the outer periphery of a crank shaft, and a combined-force transmission member that receives the combined force of a human driving force and an auxiliary driving force from a motor is disposed on the outer periphery of the crank shaft. The electric assist bicycle includes a speed reduction mechanism that has pairs of reduction gears and a selection clutch engageable with the reduction gears, combines the human driving force and the auxiliary driving force, and changes gears for the combined force of the human driving force and the auxiliary driving force.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile