Patent ID: 9261197
Filing Date: 2016-02-16
CPC Classification: F16K,Y10T

Claim Text:
1. A pressure isolation device, comprising: a housing having an internal chamber, a main inlet, a main outlet, and an inner wall between the main inlet and main outlet, wherein the inner wall includes a first opening; an elongated member disposed within the internal chamber and movable between a first position and a second position, and biased towards the first position; wherein the elongated member comprises a piston and a plug; wherein the piston is sized and dimensioned to contact a surface of the internal chamber to fluidly decouple a first portion of the internal chamber from a second portion of the internal chamber; wherein at the first position, the plug is disposed outside of the opening of the inner wall such that the opening fluidly couples the main inlet and the main outlet; and wherein at the second position, the plug is disposed in the first opening of the inner wall such that the plug fluidly decouples the main inlet from the main outlet; wherein at the second position, the main inlet is fluidly coupled with a surface of the piston and a surface of the plug; and wherein the surface plug is oriented such that a main inlet pressure acts on the surface of the plug in a direction that biases the elongated member toward the second position.