Patent ID: 7546846

Claim:
A variable pressure regulator control device comprising: a valve body having a fluid inlet, a fluid outlet, a fluid pressure-sensing chamber, and a valve seat in fluid communication with said inlet and defining an opening into said chamber; a resilient member having an outer edge and a self-restoring wall of the chamber which is responsive to pressure in said chamber; a valve stem extending through said chamber towards the valve seat; a valve element cooperating with said valve seat, said valve element being located between the valve seat and said fluid inlet; an adjuster mounted to said valve body in a position to deflect said resilient member, thereby moving the valve element away from the valve seat while said member flexes in response to pressure changes within said chamber to control the position of the valve element with respect to the valve seat, wherein said valve body includes a base incorporating said inlet, said outlet, and said valve seat; a retainer mounted atop said base, said retainer having an aperture for receiving said adjuster; and a cover fixing said adjuster for rotation therewith such that deflection of said resilient member is capable of being adjusted by rotation of said cover.