Patent ID: 8353313
Filing Date: 2013-01-15
Classification: F16K,Y10T

Abstract:
1. A three-port fluid control valve assembly for directing flow of pressurized fluid, comprising: a) a valve body having first and second valve seats disposed along a central bore terminating in an exhaust port and having a supply port formed in said valve body in communication with said first valve seat and having a common port formed in said valve body in communication with said first and second valve seats wherein said first and second valve seats face in the same direction; b) a pintle shaft extending into said central bore; c) a first valve head disposed within said central bore adjacent said first valve seat defining thereby a supply valve and actuated by said pintle shaft for mating with said first valve seat to open and close said supply port to said common port to control flow of said pressurized fluid to said common port; d) a second valve head disposed within said central bore adjacent said second valve seat for mating with said second valve seat defining thereby an exhaust valve to open and close said common port to said exhaust port, wherein said exhaust valve is closed by flow of said pressurized fluid to said common port when said supply valve is opened; e) a spring disposed against said second valve head for urging said second valve head away from said second valve seat to open said exhaust valve when said supply valve is closed; and f) an actuator operatively attached to said pintle shaft.