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. 31, 2011
Filed:
Jun. 07, 2005
Brian Joseph Dutson, Manchester, GB;
Brian Joseph Dutson, Manchester, GB;
Torotrak (Development) Limited, Leyland, Lancashire, GB;
Abstract
A continuously variable ratio device ('variator') is disclosed in which a pair of rotary races () is mounted for rotation about a common variator axis (). Drive is transferred from one race to the other through at least one roller () running upon them. The drive ratio is variable by virtue of precession of the roller about a precession axis (). Precession results in a change in angle between the roller axis and the variator axis and a corresponding change in drive ratio. In accordance with the invention, the roller () is coupled to a carrier () in a manner which permits it to precess relative to the carrier (). The carrier itself is rotatable about a carrier axis () which is non-parallel to the precession axis. Rotation of the carrier () about the carrier axis serves to change the orientation of the precession axis () and is accompanied by a change in variator drive ratio.