Rolling apparatus having surface-treated rolling member
US6612746B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1997 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Jul 30, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/62
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rolling apparatus has a surface-treated rolling member composed of a metallic rolling element and a metallic race element which have been used with a lubricant, in which the surface of at least one of the rolling element and the race element has a reaction product subsurface layer containing phosphorus and oxygen and having a thickness of from about 30 to 600 nm, where the reaction product subsurface layer has been produced by reaction between the metallic component of the rolling element or the race element and an organic phosphorus compound. The lubricant contains, as an extreme pressure component, an organic phosphorus compound; the lubricant contains the organic phosphorus compound at a concentration of 10 to 10,000 ppm in terms of phosphorus; and the lubricant is present between the metallic contact surfaces of the rolling member and the race element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.