Patent ID: 7083157

Claim:
A valve apparatus for controlling fluid flow comprising: a valve body having a fluid chamber disposed therein and including a fluid inlet and a fluid outlet in communication with the fluid chamber; a poppet assembly movably disposed within the fluid chamber and including a poppet head that is interposed between the fluid inlet and the fluid outlet; a valve seat disposed within the fluid chamber and interposed between the fluid inlet and the fluid outlet to control the flow of fluid through the fluid chamber by placement of the poppet head thereagainst; an actuator attached to the poppet assembly to move the poppet head within the fluid chamber relative to the valve seat; and a lock-out mechanism connected with the actuator for placing the valve apparatus into a closed position with the poppet head positioned against the valve seat, the lock-out mechanism comprising: a shaft member movably attached to the valve apparatus and having a shaft member end positioned adjacent the actuator; wherein the shaft member is configured to allow actuator movement when placed into a first position to permit fluid flow through the valve apparatus and to fix actuator and poppet assembly movement when placed into a second position to position the poppet head against the valve seat; and wherein the shaft member is pivotably attached to the valve apparatus adjacent the shaft member end, and wherein the shaft member end has a cammed surface to provide a space from the actuator when the shaft member is in the first position, and to eliminate the space when the shaft member is pivoted into the second position.