Patent ID: 6644351
Filing Date: 2003-11-11
Classification: F15B,Y10T

Abstract:
A booster pilot valve operated by a pressurized fluid, comprising:a body defining a fluid chamber having a main port for receiving the pressurized fluid, a cylinder port, an exhaust port, and outlet port; a hydraulic member movably disposed in the fluid chamber between a closed position and an opened position without a spring biasing the hydraulic member, the hydraulic member defining a fluid passageway that extends from a first hydraulic member area to a second hydraulic member area and that communicates at least a portion of the pressurized fluid from main port to the outlet port; a first motive force generated by the pressurized fluid from the main port reacting against first hydraulic member area; and a second motive tree generated by the portion of the pressurized fluid from the outlet port reacting against the second hydraulic member area, which area is greater than the first area, wherein during one operational state the second motive force moves the hydraulic member to the closed position and the hydraulic member facilitates communication between the cylinder port and the exhaust port, and wherein during another operational state the first motive force moves the hydraulic member to the opened position and the hydraulic member facilitates communication of at least a portion of the pressurized fluid from the main port with the cylinder port.