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:
Jun. 14, 2005
Filed:
Apr. 11, 2003
Hiroyuki Itoh, Fujisawa, JP;
Takashi Imanishi, Yokohama, JP;
Nobuo Goto, Fujisawa, JP;
Yasuo Murakami, Hadano, JP;
Tomonobu Yoshikawa, Yamato, JP;
Hiroyuki Itoh, Fujisawa, JP;
Takashi Imanishi, Yokohama, JP;
Nobuo Goto, Fujisawa, JP;
Yasuo Murakami, Hadano, JP;
Tomonobu Yoshikawa, Yamato, JP;
NSK, Ltd., Tokyo, JP;
Abstract
A power roller bearing of a toroidal-type continuously variable transmission unit that is used for a transmission of an automobile or the like comprises a power roller, an outer race, balls, a retainer, etc. Annular raceway grooves are formed individually on the respective opposite end faces of the outer race and the power roller. Treated-surface layers for enhancing the endurance of the power roller bearing are formed individually on the respective surfaces of the raceway grooves. The treated-surface layers include super-finished surfaces with the surface roughness of 0.05 Rad or less, formed individually on the raceway grooves, and low-friction layers formed individually on the super-finished surfaces. Alternatively, the treated-surface layers include residual compression stress layers formed on the respective surface layer portions of the raceway grooves by shot-preening.