Hydrostatic control device particularly a steering device
US4432270A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | May 7, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/093
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a steering control system for a bidirectional servomotor connectable to steerable wheels. The servomotor may be of the differential type in which a rod extending from one side of the piston thereof causes the effective areas on opposite sides of the piston to be unequal. A steering control unit controlled by a steering wheel has two motor ports connected to opposite sides of the servomotor and pump and tank ports connected to pump and tank units. The steering control unit has a metering motor controlled by the steering wheel which meters fluid to and away from only one side of the servomotor. The steering control unit has oppositely acting valves which may be throttle valves for establishing flow paths for opposite steering directions and the neutral condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.