Patent ID: 7766028

Claim:
A pressure regulator control device comprising: a valve body defining an inlet, an outlet, and at least partially defining a fluid pressure-sensing chamber and a valve seat in fluid communication with said inlet and defining an opening into said chamber; and a resilient diaphragm constructed from a single piece of material, said resilient diaphragm comprising: a resilient wall portion forming a wall of said chamber; a valve stem portion extending from said wall portion and through said chamber past said valve seat; and a valve element portion formed on said valve stem portion and cooperating with said valve seat to selectively block flow through said valve seat, said valve element being located between the valve seat and said fluid inlet; wherein said resilient wall portion is normally biased so as to displace said valve element portion away from said valve seat to thereby permit an inlet flow; and wherein said resilient wall portion is configured to flex so as to displace said valve element toward said valve seat to cut off said inlet flow when an outlet pressure exceeds a threshold pressure.