Non-settling glycol based magnetorheological fluids
US8062541B2 · kind B2 · utility
3Cited by
15References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2008 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Apr 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/447
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetorheological fluid comprising magnetic-responsive particles, a thickener, an ionic thixotropic additive, and a carrier fluid wherein the carrier fluid comprises a glycol-water mixture comprising at least 50 percent by weight of a glycol compound. The thickener is preferably fumed silica and the ionic thixotropic additive is preferably one of sodium nitrite, sodium chloride, sodium acetate, and sodium benzoate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.