Patent ID: 7552906

Claim:
A valve comprising: an inlet passage; an outlet passage; a valve chamber interconnecting the inlet passage and the outlet passage, the valve chamber defining an inlet aperture in communication with the inlet passage and an outlet aperture in communication with the outlet passage and defined by an arcuate valve seat, and defining, at least in part, a straight path for fluid flow extending from the inlet passage to the outlet passage; a diaphragm mounted at the valve chamber and operable between a first position sealing the inlet aperture and the outlet aperture to resist flow through the valve chamber from the inlet passage to the outlet passage and a second position spaced from at least a portion of the inlet aperture and the outlet aperture to allow flow through the valve chamber from the inlet passage to the outlet passage; a pressure chamber disposed in the valve chamber above the diaphragm for retaining fluid pressure to control movement of the diaphragm; and at least one arcuate support member corresponding to and extending across the outlet aperture and the straight path to support the diaphragm, wherein the at least one support member resists projection of the diaphragm through the outlet aperture toward the outlet passage.