| 摘要 |
A self-contained actuator of the hydraulic type for moving loads of a magnitude and for distances not practical for electric solenoids. A fluid reservoir, an electric motor, a pump and a hydraulic cylinder are mounted on a common base to comprise a compact unit, together with a belt drive connecting the motor and pump, a check valve to hold the liquid in the cylinder, a solenoid-operated return valve to drain the cylinder and a metering valve to control the rate of flow out of the cylinder. A remote, manually controlled switch device is designed to energize the motor and the solenoid in a mutually exclusive manner, the switch device having a neutral position and a spring-operated cam for normally urging the switch device to its neutral position. |
