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:
May. 12, 1998
Filed:
Mar. 28, 1996
Kosaku Yamauchi, Shizuoka-ken, JP;
Shinobu Tsutsumikoshi, Hamamatsu, JP;
Hisao Nagai, Hamamatsu, JP;
Suzuki Kabushiki Kaisha, , JP;
Abstract
A power assist apparatus of a power assisted bicycle comprises a crank shaft to be driven for rotation by a pedaling force, an electric motor for generating an assisting power, a force composition device for composing the pedaling force and the assisting power to output a composed force thereof to a driving wheel side and at the same time for generating two thrust component forces having magnitude proportional to pedaling force and assisting power, a thrust component force magnitude difference detector for detecting the difference in magnitude between the two thrust component forces, and a controller for controlling an output of the electric motor so as to bring the difference in magnitude between the two thrust component forces to '0' and to an optional magnitude difference based on an input from the thrust component force magnitude difference detector.