Thermosensitive hydraulic fan coupling
US4930458A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Jun 21, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D35/022
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A thermosensitive hydraulic fan coupler for an automobile engine, which allows a suitable amount of air to be supplied to the engine in accordance with the travelling condition of the automobile through the rotation of a fan is provided. The fan coupling according to the present invention is provided with an idle oil chamber and a specific dam within the former adjacent the oil circulation passage between the oil chamber and the torque transmission chamber with the dam serving as an opening and closing mechanism so that in addition to the effects of preventing the generation of abnormal fan noises and promoting an warming-up operation of the engine, it can more effectively prevent the phenomenon of "attendant rotation" of the driven side of the coupling immediately after restarting the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.