Step motor actuated continuously variable shock absorber
US5934422A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Mar 17, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/185
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A shock absorber includes the typical fluid valving in the piston and in the base valve assembly which is designed to provide a firm damping characteristic for the shock absorber. A stepper valve assembly includes a bypass fluid passage between the upper working chamber and the reserve chamber which when opened provides a soft damping characteristic during an extension movement of the shock absorber. The stepper valve assembly also includes a bypass fluid passage between the lower working chamber and the reserve chamber which when opened provides a soft damping characteristic during a compression movement of the shock absorber. The stepper valve assembly selectively opens and closes the bypass fluid passages to adapt the shock absorber to changing vehicle conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.