Electro-viscous fan clutch with snap action spring valve element for control of fluid gate
US4265348A · kind A · utility
10Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1979 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Oct 26, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D35/024
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electro-viscous hydraulic clutch for a fan clutch in which a control arm for controlling the fluid to a shear zone of the fluid clutch is incorporated in an over-center spring which hinges on the pump plate for snap action operation. The control arm is actuated by an electromagnetic device which is mounted either on a fan clutch cover plate or on the fan clutch shaft pole. This invention features low actuating force, snap action control arm operation and integral spring return. The spring return disengages the clutch when the solenoid or coil power is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.