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:
Dec. 13, 2016
Filed:
Dec. 12, 2012
Piaggio & C. S.p.a., Pontedera, Pisa, IT;
Walter Mariotti, Pisa, IT;
Paolo Nesti, Pisa, IT;
PIAGGIO & C. S.p.A., Pontedera, Pisa, IT;
Abstract
A continuously variable transmission system for a motorcycle includes a first drive sheave () operated by a transmission half-shaft () and a second driven sheave, connected by a V-belt. The drive sheave () has a first half-sheave () and a second half-sheave () substantially conical, sliding axially aligned, joined in rotation. The first half sheave () is fitted internally with a speed regulator composed of centrifugal masses () which move to cause the axial shift in the direction of extension of the transmission half-shaft (), of the first half-sheave () relative to the corresponding second half-sheave (). A device () for regulating the gear change curve is provided with an electromechanical actuator to cause selective intervention of a determined group of centrifugal masses () to vary, for the same number of revs of the engine, the centrifugal force needed to achieve the axial shift of the first half-sheave ().