Patent ID: 9458696
Filing Date: 2016-10-04
CPC Classification: E21B

Claim Text:
1. A valve assembly comprising a body having a main passage, and a valve member which is located in the main passage and which is rotatable between an open position in which the main passage is substantially open, and a closed position in which the valve member substantially blocks the main passage, and an actuator which is movable generally parallel to the longitudinal axis of the main passage, the actuator being engaged with the valve member such that movement of the actuator generally parallel to the longitudinal axis of the main passage causes the valve member to rotate between its open and closed positions, wherein, the valve member is provided with a central passage which extends right through the valve member, the central passage having a longitudinal axis which extends generally perpendicular to the axis of rotation of the valve member, when the valve member is in the open position, the central passage lies generally parallel to the main passage so that fluid flowing along the main passage of the valve assembly travels via the central passage in the valve member, and when the valve member is in the closed position, the central passage lies generally perpendicular to the main passage, the valve member is provided with a generally circular and planar index surface which extends generally parallel to the longitudinal axis of the central passage, the index surface is provided with a track and the actuator sleeve is provided with a corresponding coupling formation which engages with the track to guide movement of the ball relative to the actuator in a predetermined manner, and the coupling formation comprises a pin mounted on an arm which extends between the index surface and the body from an end of the actuator adjacent the valve member, the pin extending from the arm towards the index surface.