Pressure responsive flow divider valve for servo-powered steering devices
US4625747A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Feb 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2597
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A pressure responsive flow divider valve for servo-powered steering devices comprises a flow control valve having three ports to divide the fluid flow delivered by a pump between a pair of partial volumes, one flowing to the steering valve and the other flowing to a further hydraulic load. When the steering device is not operated, the further load is primarily supplied with fluid, while the flow to the load is reduced, but the steering valve is fully supplied when the steering device is actuated. The valve comprises a valve member which is actuated in response to pressure to change the cross section of the throttle in the flow control valve so that the steering valve is supplied with a relatively small volume of fluid when the steering device is not operated, whereas the valve member is shifted by a pressure increase when the steering device is actuated to supply an increased fluid flow to the steering valve as required. The valve according to the invention allows to reduce energy to drive the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.