Variable rate shock absorber and system therefor
US4854429A · kind A · utility
Inventor
Key dates
| Filing date | Dec 18, 1987 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Dec 18, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87507
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention describes an electrically controllable mono-tube shock absorber wherein the damping of the shock absorber is controlled by a solenoid valve. The valve includes a poppet valve which is mechanically independent of an electrically actuated armature. A second valve is also disclosed which includes a poppet valve having a cylindrical wall which prevents the poppet valve from contacting the armature. A third valve, carried by the shock absorber piston includes two axially extending passages one of which cooperates with a poppet valve to increase fluid flow thereacross to reduce damping. Each valve can be actuated in accordance with the direction (sign) of a derived velocity signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.