Pressure regulator assembly with improved cartridge

Claim 1

In a pressure regulator for reducing pressure from high pressure to a low pressure and including: a. a valve body having inlet and outlet passageways and chambers; b. a valve seat intermediate said inlet and outlet chambers; c. a valve poppet for sealingly engaging against said valve seat; d. adjustable spring with a bottom plate for adjusting the low pressure; and e. diaphram member communicating with said low pressure chamber so as to sense said low pressure and opposing said adjustable spring so as to allow said valve poppet to close against a valve seat when said pressure becomes great enough and to open when said low pressure is below, the predetermined pressure set on said adjustable spring; the improvement comprising: f. having said poppet include a centering extension shaft extending to the low pressure side of said valve seat and a larger diameter shaft in communication with said high pressure inlet chamber; and g. having said valve seat include centering upper protrusion that closely engages said centering extension shaft of said poppet with at least three and no more than six slots disposed substantially uniformly thereabout such that gas can flow about said valve poppet centering extension shaft through said valve seat without inducing destructive and noisy vibration when gas flow is called for by said adjustable spring opposing said diaphram member.