Temperature-controlled fan fluid coupling
US4903805A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Nov 4, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D35/022
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fan fluid coupling for controlling the rotational speed of a fan that cools an automobile engine. The coupling comprises an enclosed housing, a partition plate that divides the inside of the housing into an oil reservoir chamber and a torque transmission chamber, a driving disk, a dam, a passage extending from the torque transmission chamber to the oil reservoir chamber, a bimetallic strip, a valve member, an idle oil reservoir chamber, and a circular hole formed in the driving disk for placing the idle oil reservoir chamber in communication with the torque transmission chamber only when the associated engine is at rest. At least one small hole is formed in the wall defining the idle oil reservoir chamber, and this hole is in communication with the torque transmission chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.