Patent ID: 6568653
Filing Date: 2003-05-27
Classification: F16K

Abstract:
A butterfly valve for use with an air injection system of a ported rotary kiln, comprising:a valve housing having an air passageway and including an air inlet and an air outlet; a valve member rotatable within said housing to open and close said passageway; a valve stem defining an axis of rotation and connected to said valve member for rotation therewith; and a valve actuator assembly mounted on said valve stem to rotate said valve member, said valve actuator assembly comprising: an actuator base connected to said valve stem for rotation therewith; a lever assembly mounted coaxially with said actuator base and valve stem to freely rotate relative to said actuator base and valve stem; and a lost motion mechanism interconnecting said actuator base and said lever assembly for transferring torque from said lever assembly to said actuator base as said lever assembly rotates.