Control apparatus for hydrostatic motor vehicle steering apparatus
US4774807A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1987 |
| Grant date | Oct 4, 1988 |
| Priority date | — |
| Expiry date | Aug 20, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/093
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to hydrostatic steering control apparatus of the type having a hydrostatic steering motor which is connected to wheels to be steered and a steering wheel controlled metering or quantity setting device for controlling the hydraulic fluid supplied to the steering motor. A hydraulic amplifier connected to the steering motor has the characteristics of generating and transmitting undesired pressure pulses to the steering motor during steering switching operations. One way pre-stressed check valves are disposed respectively between the quantity setting apparatus motor ports and the steering motor ports. The check valves open in the direction of the steering motor ports and operate to allow bypassing the amplifier during the steering switching operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.