Patent ID: 8167266

Claim:
A clutch apparatus for an electric valve actuator having an opening and closing portion for opening and closing a flow passage of a fluid, an actuator body, a manual handle rotably coupled to one side of the actuator body, a motor axis of a main motor coupled to the opening and closing portion, and a handle axis, which is extended from one side of the manual handle to a rear portion thereof, connected to or separated from the motor axis comprising: a main gear coupled to an end portion of the handle axis; a clutch disc having a support groove located at an upper portion thereof and a coupling hole for inserting the clutch disc to the handle axis therethrough; an elastic means formed between the manual handle and the clutch disc in such a manner that the clutch disc is adhered to one side of the main gear; passivity gears rotably coupled to the clutch disc and interlocked with the main gear to be rotated together with the main gear according to a rotation of the handle axis; a stopper having a rotation body rotably formed above the support groove of the clutch disc and a support rib protruded from the rotation body outwards and being rotated at a right angle between a connecting location of the passivity gears and the motor axis constructed in such a manner that the passivity gears is engaged with the motor axis in a state that an inner wall of the clutch disc, in which the support groove is formed, is supported on the rotation body and a separating location of the passivity gears and the motor axis constructed in such a manner that the passivity gears is separated from the motor axis in a state that the inner wall of the clutch disc, in which the support groove is formed, is supported on the support rib; and a rotation power providing means for providing a rotation power to the stopper formed at one side of the actuator body and connected to the stopper.