Dynamic pressure air bearing
US4797009A · kind A · utility
50Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Sep 28, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00353
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dynamic pressure air bearing which comprises a sleeve member, with a shaft member arranged coaxially therein. Air is introduced through a clearance between the sleeve member and the shaft member by the rotation of either the sleeve member or the shaft member, and the dynamic pressure of the air acts on the inner surface of the sleeve member and the surface of the shaft member. Ceramics cover at least one of the inner surface of the sleeve member and the surface of the shaft member. The ceramics include at least one type selected from among SiN, SiCN, SiC, SiO, TiN, TiC, TiCN, BN, BC, BCN, Al.sub.2 O.sub.3, WC, and diamond.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.