Patent ID: 9228334
Filing Date: 2016-01-05
CPC Classification: A47K,E03D,F15B

Claim Text:
1. A liquid-operated actuator assembly comprising: a main valve having an inlet for receiving a liquid from a pressurized liquid source, and an outlet for flow of the liquid from the main valve when the main valve is open, wherein the main valve prevents the flow of the liquid from the inlet to the outlet when the main valve is closed; a pilot valve of a smaller flow capacity than the main valve and in communication with the outlet of the main valve, wherein a bi-stable latching solenoid transitioning the pilot valve between the open state and the closed state in response to an electrical pulse and maintaining the pilot valve in the open state and in the closed state without consuming electricity; an electronic control circuit for generating and applying electrical pulses to the bi-stable latching solenoid; a hydraulic actuator in communication with the outlet of the main valve for receiving the liquid discharged from the main valve and comprising a spring-loaded shuttle valve communicating with the outlet of the main valve and selectively communicating the chamber with a drain of the liquid-operated actuator, wherein