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:
Nov. 17, 2015
Filed:
Jun. 05, 2008
Hiroki Nishii, Fujisawa, JP;
Takashi Imanishi, Fujisawa, JP;
Hiroki Nishii, Fujisawa, JP;
Takashi Imanishi, Fujisawa, JP;
NSK LTD., Tokyo, JP;
Abstract
Power roller-side concave grooves are opposed to disk-side concave groovesso as to have angles therebetween in a rolling contact area between a peripheral surface of the power roller and a one-side surfaceof a diskin an axial direction regardless of a transmission gear ratio of a toroidal continuously variable transmission. Accordingly, the disk-side concave groovesare formed so as to have angles with respect to a circumferential direction of the diskwhen viewed from a normal direction relative to the one-side surfacein the axial direction. Meanwhile, the power roller-side concave grooves are formed into a concentric shape (or a spiral shape) about a central shaft of the power roller. As a result, it is possible to prevent a decrease of a contact area in the rolling contact area regardless of the transmission gear ratio.