Asymmetric sealing means for fluid dynamic bearings
US5980113A · kind A · utility
30Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Apr 14, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved capillary seal for use with a hydrodynamic bearing is disclosed, which provides a stronger or stiffer seal for a fluid dynamic bearing motor which is open at both ends, and is used with top cover attached motors utilizing fluid dynamic bearings. The design for the seal system actively pushes the oil back into the FDB while it is spinning, combined with the capillary tension which holds oil in the FDB during stationary periods, and allows air, trapped within the seal and the associated FDB, to be expelled, eliminating air bubbles from the fluid dynamic bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.