Patent ID: 6953084

Claim:
An electrically actuated valve, comprising: an electrical motor adapted to rotate an output shaft, a gear reduction train comprising a plurality of gears including an input gear driven by the output shaft and a rotary output, the plurality of gears adapted to amplify force from the input gear to the rotary output when the electrical motor rotates the output shaft; a manual override input acting upon the gear reduction train; a brake having on and off positions acting upon the gear reduction train, the brake when in the on position adapted to prevent backdriving of the gear reduction train; a valve adapted to control fluid flow therethrough, the valve including a valve housing and a valve member, the valve housing defining a flow passage, the valve member movable in the valve housing between open and closed positions to control a degree of opening of the flow passage; and a spring arranged to urge the valve to one of the open and closed positions, the brake when in the on position providing sufficient resistance to hold a current position of the valve against the action of the spring, and wherein the motor has a sufficient rotary output force to overcome resistance of the brake when in the on position to move the valve.