Liquid-operated actuator assembly
AssigneeDefond Components Limited
InventorKwok Chiu Yu
Life of this patent
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Abstract
A liquid-operated actuator assembly includes a valve with an inlet for connection to a source of a liquid, a bi-stable electromagnetic device for operating the valve, and an actuator including a piston in a cylinder. The piston incorporates an actuating member. The cylinder has a chamber on one side of the piston to which the outlet of the valve is connected for receiving the liquid when the valve is opened in order to move the piston and the actuating member to an operative position. An electronic control circuit momentarily energizes the electromagnetic device for operation of the actuating member and to terminate operation of the actuating member.
Claims22
A liquid-operated actuator assembly comprising:
- a valve having an inlet and an outlet, the inlet being for connection to a liquid source;
- a bi-stable electromagnetic device for operating the valve, the bi-stable electromagnetic device having a first state closing the valve and a second state opening the valve;
- an actuator comprising a piston in a cylinder, the piston incorporating an actuating member, the cylinder having a chamber on one side of the piston to which the outlet of the valve is connected for receiving a liquid flowing from the liquid source when the valve is opened by the bi-stable electromagnetic device for moving the piston, and, in turn, the actuating member from an inoperative position to an operative position, and for holding the actuating member in the operative position;
- and
- an electronic control circuit for momentarily energizing the bi-stable electromagnetic device to change the bi-stable electromagnetic device from the first state to the second state for operation of the actuating member, and from the second state to the first state to terminate operation of the actuating member.
Dependencies are inferred from the claim text.