Electroviscous fluid-actuated devices
US4782927A · kind A · utility
19Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | May 4, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D37/008
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An electroviscous fluid actuated device, such as a clutch, comprises relatively rotatable electrode plates (10,11) defining a gap (12) therebetween of 2 mm to 5 mm width. An electroviscous fluid in the gap (12) becomes "solid" when a pulsating d.c. is applied to the plates. Slippage can be controlled by controlling the peak value of the pulsating d.c. The electroviscous fluid comprises a suspension of starch in silicone oil, having a ratio by weight of at least 1:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.