Viscous fan drive and axially movable valve element
US4633994A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Nov 22, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D35/024
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fluid coupling device is provided of the type including an input coupling member (11) and an output coupling assembly (13). The unit includes a fluid operating chamber (33) and a fluid reservoir chamber (37), and a valve means (55) is included to control the flow of fluid between the chambers. The valve means (55) includes an elongated valve element (57) which is moved axially in response to energization of an electromagnetic coil (75). The valve element (57) includes a control portion (71) which is oriented at approximately a right angle relative to the valve element (57). The flow control portion is in engagement with a cylindrical surface (51) which defines the valve port (53), such that axial movement of the valve element results in sliding engagement between the control portion (71) and surface (51) to cover and uncover the valve port (53).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.