Abstract: An actuator for a valve, said valve including a cylindrical valve body having a valve member disposed therein with a first gear attached to said valve member. A second gear is provided for drivingly engaging said first gear to operate said valve member. A support member is adapted to be attached to the valve body, and a first frame is rotatingly connected to the support member so that the valve body may rotate relative to said first frame. A hydraulic cylinder is connected between said first frame and a second frame. The second gear is rotatingly mounted upon the second frame. The hydraulic cylinder selectively moves said second gear into and out of engagement with said first gear. A locking apparatus is provided for selectively locking the first frame to the support member means to prevent the first frame from rotating relative to the valve body when the locking apparatus is in the locked position.

Abstract: A power actuated kelly valve includes a cylindrical valve body having a valve member disposed therein with a first gear attached to said valve member. A second gear is provided for drivingly engaging said first gear to operate said valve member. A support member is attached to the valve body, and a first frame is rotatingly connected to the support member so that the valve body may rotate relative to the first frame. A moving apparatus is connected between the first frame and a second frame. The moving apparatus provides apparatus for selectively moving the second gear into and out of engagement with the first gear. A locking device is provided for selectively locking the first frame to the support member to prevent the first frame from rotating relative to the valve body when the locking device is in the locked position.