Patent ID: 8622081

Claim:
A second stage regulator for reducing the pressure of gas received from an intermediate pressure hose to ambient pressure, comprising: a second stage regulator housing including a mouthpiece configured to provide ambient pressure gas to a diver, and a gas inlet opening; and a valve comprising: a valve housing, comprising: an outlet end portion configured to removably secure the valve to the gas inlet opening of the second stage regulator housing, where the outlet end portion is threaded, an inlet end portion configured to connect to said hose, and a bore; a filter; a pressure responsive element configured to move between a first position in the valve housing in which the pressure responsive element blocks the inlet end portion of the valve housing and a second position in the valve housing in which gas can enter the inlet end portion of the valve housing; and a bias member configured to bias the pressure responsive element in the first position; wherein: the filter is located within the bore; the filter is contained within the bias member contained within the bore; and the filter is positioned between the pressure responsive element and the outlet end portion.