Patent ID: 8851445

Claim:
A locking valve comprising: a body having an inlet port and an outlet port; a ball, rotatably disposed within an aperture of the body, the ball having a bore through a center, the ball providing fluid communication between the inlet port and the outlet port of the body in an open position, and preventing fluid communication between the inlet port and the outlet port of the body in a closed position; an actuator connected to the ball; a chamber formed by the body, the chamber being in fluid communication with the aperture of the body; a secondary inlet port formed by the body providing fluid communication between the inlet port of the body and the chamber; and a single piece piston slideably disposed within the chamber, the piston slideable between a first position entirely within the chamber and a second position protruding at least partially into the aperture of the body, the piston positioned within the chamber such that a fluid from the secondary inlet port exerts a force directly on the piston.