Bearing unit
US4883367A · kind A · utility
35Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Apr 28, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C17/107
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a bearing unit using a hydrodynamic lubrication film (5 or 25) of a lubrication fluid, a shaft (2 or 22) comprises plural spiral grooves (6a, 6b or 26) thereon, at least one circumference groove (7a, 7b or 27) thereon and an inner passage ((8+9+10) or (29+30)), which leads the fluid pumped by the spiral grooves (6a, 6b or 26) to the circumferential groove (7a, 7b or 27), therein, thereby to produce both functions of a kinetic pressure bearing and a static pressure bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.