Power roller bearing of toroidal-type continuously variable...

Details Power roller bearing of toroidal-type continuously variable... Power roller bearing of toroidal-type continuously variable...

2005-06-14

2005-06-14

Joyce, William C (Department: 3682)

Friction gear transmission systems or components

Friction transmission or element

Particular friction surface

C476S040000, C384S516000

Reexamination Certificate

active

06905437

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.

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International Search Report.

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