Exhaust valve assembly

An exhaust valve assembly comprising:

• a housing including a body having a cavity, supply and delivery ports in said body extending substantially perpendicular to one another in communication with said cavity, said housing including a cover secured to said body over said cavity opposite said supply port, a hole in said cover in axial alignment with said supply port, a plurality of openings through said cover outwardly of said hole and defining an exhaust port for said valve, a flexible diaphragm positioned in said cavity between said cover and supply port and having a central integral stem extending through said hole in firm engagement therewith for inhibiting movement of said diaphragm toward and away from said exhaust port and thereby inhibiting horning of said diaphragm, said diaphragm being operative in response to air pressure at said supply port to close said exhaust port and provide communication between said supply and delivery ports, and said diaphragm being responsive to air pressure at said delivery port in the absence of air pressure at said supply port to close said supply port and provide communication between said delivery and exhaust ports.