Hydrodynamic bearing device and spindle motor
US7350975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2005 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Oct 9, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C43/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention provides a hydrodynamic bearing device with a function of circulating the operating fluid by supplying the operating fluid to between the cover and the sleeve by way of a circular communication path, the hydrodynamic bearing device allowing the cover for covering the sleeve to be satisfactorily bonded, preventing the operating fluid from leaking outward, and preventing the adhesive from blocking the opening of the circular communication path; and a spindle motor. An adhesive inflow allowing space for allowing the adhesive from the adhesive setting and bonding part to flow in is formed between the adhesive setting and bonding part for setting the adhesive and bonding the cover and the sleeve, and a space region on the open end side between the cover and the sleeve for circulating and introducing the operating fluid so as to create a space in the cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.