Patent ID: 7213612
Filing Date: 2007-05-08
Classification: B29C,C03B,F15B,F16K,Y10S,Y10T

Abstract:
1. A control valve comprising: a first fluid inlet at a first pressure; a second fluid inlet at a second pressure; an outlet passage fluidly connectable with a fluid-actuated device; a first valve mechanism in fluid communication between said first inlet and said outlet passage; a second valve mechanism in fluid communication between said second inlet and said outlet passage, said second valve mechanism moveable between a closed position, wherein said working fluid is precluded from flowing therethrough, a fully opened position, wherein said working fluid is permitted to flow therethrough, and a plurality of intermediate positions; and a control stem operably coupled to said second valve mechanism, said control stem being selectively adjustable to a plurality of positions for actuating said second valve mechanism into said closed position, said fully opened position, and said plurality of intermediate positions, thereby limiting the flow of working fluid through said second valve mechanism, wherein at least one of said first and second valve mechanisms include a generally spherical ball-poppet selectively movable between said closed and fully opened positions.