Patent ID: 6155293
Filing Date: 2000-12-05
Classification: F15B,F16P,Y10T

Abstract:
A control valve system comprising:a housing defining a reset port, an inlet, an outlet and an exhaust;a first passage extending between said inlet and said outlet;a second passage extending between said outlet and said exhaust;a first plurality of valves disposed within said first passage, each of said first plurality of valves being movable between a deactuated position where said first passage is closed and an actuated position where said first passage is open;a second plurality of valves disposed within said second passage, each of said second plurality of valves being movable between a deactuated position where said second passage is open and an actuated position where said second passage is closed;means for maintaining one of said first plurality of valves in said actuated position when one other of said first plurality of valves is in said deactuated position;a reset passage extending between said first passage and said reset port, each of said first plurality of valves being moved to said deactuated position when a pressurized fluid is supplied to said reset passage; andan anti-tiedown circuit, said anti-tiedown circuit preventing said one of first plurality of valves from being moved to said actuated position while the pressurized fluid is supplied to said reset port.