Self-cooling ferrfluid seal
US7338049B2 · kind B2 · utility
2Cited by
18References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2005 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Dec 4, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/93
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A self-cooling ferrofluid seal includes a housing having a housing case and an external pole piece integrally connected to the housing case where the housing case has a plurality of heat dissipating surfaces, a magnetic circuit within the housing formed in conjunction with the external pole piece, a rotatable shaft having one or more fan blades where the rotatable shaft is coaxially aligned within the housing, and a quantity of magnetic fluid between the rotatable shaft and the external pole piece forming a ferrofluid seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.