Magnetic fluid seal device
US7100923B2 · kind B2 · utility
3Cited by
7References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 2002 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Nov 3, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/43
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A magnetic fluid seal device that increases a permissible value of eccentricity for two members to improve sealability and decreases a variation of quality by injecting a magnetic fluid before assembling of parts, that saves structural members to achieve thinning, and that is easy to produce. An annular magnet 3 is buoyantly supported by the magnetic fluid 4 and 5 retained, and the space between a housing 1 and a shaft 2 is sealed by the annular magnet 3 and magnetic fluid 4 and 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.