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:
Oct. 08, 2013
Filed:
Feb. 12, 2010
Frank Moeller, Milford, GB;
Martin Weber, Berlin, DE;
Frank Moeller, Milford, GB;
Martin Weber, Berlin, DE;
Nexxtdrive Limited, London, GB;
Abstract
A method is provided for controlling operation of a pedal cycle () having a rear hub-mounted electro-mechanical transmission arrangement in which a chain-driven rear sprocket (), an input electrical machine () and the hub () are each coupled to a respective branch of a three-branch epicyclic gear set (). Allowing for natural variations in input torque by a cyclist over a cycle of the crank arms (), a substantially constant current is caused to exist in the input electrical machine () such that a change in torque applied by the cyclist results in a change in transmission ratio between the rear sprocket () and the hub (), thereby providing a form of automatic and continuously variable transmission for the pedal cycle ().