Patent ID: 6082406
Filing Date: 2000-07-04
Classification: F15B,Y10T

Abstract:
A valve assembly for delivering a supply flow of pneumatic air from a supply of pressurized air, said valve comprising:a housing having a supply passage, an outlet passage, and an exhaust passage, said supply passage receiving supply pressure from the supply of pressurized air, said housing further having a dome passage for communicating a flow of pilot pressure from a supply of pilot pressure;a valve head mounted in said housing and biased to a closed position against a valve seat by a biasing member;a cylindrical main valve member and a plunger body slidably mounted in a bore of said housing, said main valve member and said plunger body movable in said bore to move said valve head to open said supply passage in response to pilot pressure in said dome passage and communicate supply pressure from said supply passage to said outlet passage and to an interior face of said main valve, said main valve slidable away from said plunger body to open said exhaust passage when a sum of said biasing force of said biasing member and said supply pressure on said interior surface of said main valve is greater than said pilot pressure in said dome passage.