Oscillation damper
US5413196A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Mar 17, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/465
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
According to an illustrative example of the present invention an oscillation damper is provided with a bypass interconnecting two fluid chambers. A main valve is provided within this bypass for allowing variation of the damping behavior of the oscillation damper. An electro-magnetic valve is used for controlling the hydraulic pressure acting onto the main valve. The electro-magnetic valve is biased toward an emergency position. The biasing force is obtained by two parallel acting springs. A first one of these springs is relatively weak, so that the valve can be transferred by low electric current in a magnetic coil against the action of the weak spring to a first operational position to be used during a major part of the operational time of the oscillation damper. By considerable increase of the electric current the valve can be further transferred into a further operational position which is desired only in exceptional situations. Therefore, a low electric energy consumption is needed for the control of the electro-magnetic valve. The normal operational condition of the electro-magnetic valve is stabilized by the second, harder spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.