Patent ID: 8567759
Filing Date: 2013-10-29
Classification: E21B,F16K,Y10T

Abstract:
1. A valve assembly, comprising: a housing; a cavity in the housing; a flow passage formed through the housing and the cavity; a gate slidably disposed in the cavity that is selectively moveable between an open position and a closed position, and having an upstream side and a downstream side; a bore formed through the gate that registers with the flow passage when the gate is in the open position; and a fluidic passage in the gate and having an entrance spaced from the bore so that at least a portion of an exterior surface of the upstream side of the gate is between the entrance and the bore, and an exit intersecting the bore, so that when fluid flows through the valve assembly and the gate is moving into the closed position, a portion of the fluid passes into the fluidic passage at the upstream side and exits the fluidic passage into the bore.