Patent ID: 9133946
Filing Date: 2015-09-15
Classification: F16K,Y10T

Abstract:
1. A slam-shut safety device, comprising: a valve body, the valve body having an inlet, an outlet, and defining a flow path extending between the inlet and the outlet, the valve body including a valve seat surrounding an orifice disposed between the inlet and the outlet; a valve disc, the valve disc disposed within the valve body and shiftable between an open first position in which the valve disc is spaced away from the valve seat, and a closed second position in which the valve disc is seated against the valve seat; a reset pin operatively coupled to the valve disc and shiftable relative to the valve body between an untripped position placing the valve disc in the open first position and a tripped position placing the valve disc in the closed second position, the reset pin arranged to respond to an actuator to shift the reset pin from the untripped position toward the tripped position; and a cage mounted within the valve body and disposed in the flow path, the cage sized to slidably receive the valve disc; wherein the cage includes a plurality of flow apertures, wherein the cage is cylindrical and includes a first end mounted adjacent the valve seat and a second end spaced away from the valve seat, the valve disc being retracted past the plurality of apertures and into a recess formed by the cage when the valve disc is in the open first position, and wherein each of the plurality of apertures extends partially along a circumference of the cage, each of the plurality of apertures being bounded by a first circumferentially extending edge disposed toward the first end of the cage, a second circumferentially extending edge disposed toward the second end of the cage, and a pair of side edges extending parallel to the axis.