Failure indicator seal for a rotary feedthrough
US8531195B2 · kind B2 · utility
0Cited by
16References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2010 |
| Grant date | Sep 10, 2013 |
| Priority date | — |
| Expiry date | Oct 25, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3296
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A failure indicator seal includes a nonmagnetic housing, a plurality of annular pole pieces having distal ends, the plurality of annular pole pieces disposed within the nonmagnetic housing, an annular, non-conducting magnet disposed between the pole pieces, a predefined quantity of magnetic fluid disposed between each of the distal ends of the plurality of annular pole pieces and the rotary shaft of a rotary feedthrough forming a plurality of magnetic fluid O-ring seals, and means for measuring resistance through the plurality of annular pole pieces, the plurality of magnetic fluid O-ring seals and the rotary shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.