Patent ID: 8485213

Claim:
A loading regulator having an internal relief valve apparatus, comprising: a body having a loading diaphragm disposed between a first casing and a second casing, the first casing and a first side of the loading diaphragm define a first chamber and the second casing and a second side of the loading diaphragm define a second chamber; and a relief valve assembly coupled to the loading diaphragm including: a relief valve plug; and a relief valve seat having an aperture that forms a passageway to fluidly couple the first chamber and the second chamber, the relief valve seat to move away from the relief valve plug to provide a pressure offset that prevents fluid flow through the passageway when an outlet fluid pressure of the loading regulator is between an outlet fluid pressure that causes onset of a bleed condition of the loading regulator and an outlet fluid pressure that causes onset of a lock-up condition of the loading regulator.