Patent ID: 9328827
Filing Date: 2016-05-03
CPC Classification: F16K

Claim Text:
1. A quarter-turn valve comprising: (a) a valve body having a tubular bore flow passage and an intersecting transverse port, wherein the transverse port is closed on one end with a bonnet flange; (b) a ball valve housed within the valve body and having a valve flow passage, wherein the ball valve is rotatable about a rotational axis transverse to valve flow passage to either an open position, where said valve flow passage is aligned with the bore flow passage to permit flow, or a closed position, where the valve flow passage is misaligned with the bore flow passage to prevent flow; (c) an arcuate groove concentric with the rotational axis on an upper face of the ball valve; (d) a pair of opposed ball seats with each seat having a cam pocket, wherein the ball seats are axially reciprocal between a first seat position where each ball seat has a spherical sealing face sealingly comated with a sealing surface of the ball valve and a second seat position where each ball seat is displaced from the sealing surface of the ball valve; (e) a rotatable cam attached to the valve ball with a cam axis of rotation concentric with the rotational axis of the ball valve, the cam having (f) a rotatable valve stem rotationally engaged with the cam and the ball valve; and (g) a flow restricting means for restricting the flow around the ball valve whenever the ball seats are in the second seat position.