Patent ID: 6478049
Filing Date: 2002-11-12
Classification: F15B,F16P,Y10T

Abstract:
A control valve system comprising:a housing defining 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, an actuated position where said first passage is open, and an intermediate position where said first passage is partially 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, an actuated position where said second passage is closed, and an intermediate position where said second passage is partially open; and a plurality of reset members selectively engageable with said first plurality of valves, said plurality of reset members operable to move said first plurality of valves to said deactuated position when a pressure is applied to said plurality of reset members, said plurality of reset members each having an anti-tiedown stem extending therefrom engageable with said first plurality of valves to prevent operation of the control valve system if any of said plurality of reset members is tied down.