Servo device for controlling the flow rate of a hydraulic system, in particular the power-assisted steering of a vehicle
US4850390A · kind A · utility
4Cited by
4References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1988 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Oct 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87265
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The flow-rate control device (10), which is arranged in a branch line (6), comprises a slide (19) forming, together with an outlet channel, a variable constriction (.sigma..sub.1), the slide being biased by a spring, one end of which bears against the end of an actuating rod (30) biased by a piston (21) actuated by a speed-reducing servo-drive unit (22) controlled by an electrical signal (11) dependent on a significant parameter, for example the speed of a vehicle for power-assisted steering of the vehicle. The rod (30) further controls an internal bypass passage (33, 34) parallel to the variable constriction (.sigma..sub.1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.