Pressure-operated servo system for vehicle steering device includes pump drive designed so that amount of pressurised medium supplied by pump per unit time is variable and its delivery direction reversible

摘要

The servo system which is actuated by pressurised medium comprises a double-acting actuator (12) and pump (14) whose pump drive (16) is designed so that the amount of pressurised medium supplied by the pump per unit time can be changed and its delivery direction can be reversed. The pressurised medium pump can be a rotary pump whose drive is a variable-speed reversible-direction electro motor (16). Independent claim describes steering device with force transfer unit transferring force from the actuator to the wheel socket. Independent claim describes floor conveyor such as stacker with servo system as above.