Hydrodynamic bearing device, method for manufacturing the same, spindle motor and recording and reproduction apparatus
US7435001B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2006 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Apr 16, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydrodynamic bearing device which can improve workability of injecting a lube repellant and effectively prevent leakage of a lubricant, a method for manufacturing the same, a spindle motor, and a recording and reproduction apparatus are provided. A hydrodynamic bearing device 4 includes a lube repellant 11a which is applied in a circular shape by a predetermined distance in a radial direction from a portion of an upper surface of a second thrust flange 41c where it is connected to a shaft 41 and a lube repellant 11b which is applied in a circular shape on an outer peripheral surface of the second thrust flange 41c below from an upper end in the radial direction by a predetermined distance. The lube repellant 11b is applied near the upper end portion in a gap formed between the outer peripheral surface of the second thrust flange 41c and an inner peripheral surface of an outer sleeve 44.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.