Patent ID: 6209577
Filing Date: 2001-04-03
Classification: G05D,Y10T

Abstract:
A pilot valve comprising:a body having a channel formed therein, a unitary inlet chamber formed along said channel, an inlet port in communication with said inlet chamber, a control port in communication with said channel, and a vent port in communication with said channel;a first spool movable within said channel in response to variations in a fluid pressure value within said unitary inlet chamber;a second spool movable within said channel, said second spool cooperating with said first spool to form an inlet valve regulating fluid flow between said inlet chamber and said control port and said second spool cooperating with said body to form a vent valve regulating flow between said control port and said vent port; anda spring between said first spool and said second spool and urging said first and second spools in opposite directions.