Hydrodynamic gas bearing structure
US6200035A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydrodynamic gas bearing structure includes a fixed shaft, a hollow cylindrical sleeve opposing to the fixed shaft with a radial space kept therebetween, and a thrust plate having an opposing surface opposing to an end surface in the axial direction of the sleeve. The opposing surface of the thrust plate has a groove for generating dynamic pressure between the sleeve and the thrust plate, a protruded portion formed at an inner peripheral portion, and a recessed portion formed shallower than the groove, extending from the protruded portion toward an outer peripheral portion. Top surface of the protruded portion is at a position of a first height from the bottom of the recessed portion, and the outer peripheral portion of the opposing surface includes a portion at a position of a second height lower than the first height from the bottom of the recessed portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.