High pressure modulating valve

Claim 1

A BALANCED HIGH PRESSURE FLUID MODULATING VALVE, COMPRISING: MEANS INCLUDING A WALL DEFINING A VALVE CHAMBER; AN ELONGATE AXIALLY MOVABLE POPPET EXTENDING THROUGH SAID CHAMBER HAVING A CYLINDRICAL OUTER SURFACE; POPPET SEALING MEANS RESPECTIVELY AT OPPOSITE ENDS OF SAID CHAMBER; A CIRCUMFERENTIAL SEAL MEMBER BETWEEN SAID POPPET OUTER SURFACE AND ADJACENT CHAMBER WALL SEPARATING SAID CHAMBER INTO FLUID INLET AND FLUID OUTLET SECTIONS DISPOSED ON OPPOSITE SIDES OF SAID SEAL IN WHICH THE FLUID PRESSURES ACT RADIALLY INWARDLY ON SAID OUTER SURFACE; A PLURALITY OF ELONGATE LOW FLOW NARROW SLITS EXTENDING GENERALLY LONGITUDINALLY OF SAID POPPET IN SAID OUTER SURFACE THEREOF AND BEING SPACED APART CIRCUMFERENTIALLY OF SAID POPPET, ALL OF SAID SLITS BEING CONTINUOUSLY IN COMMUNICATION WITH SAID OUTLET SECTION, AND SUCCESSIVELY CONNECTABLE AND DISCONNECTABLE WITH SAID INLET SECTION IN RESPONSE TO AXIAL MOVEMENTS OF SAID POPPET IN OPPOSITE DIRECTIONS TO MODULATE FLOW FROM THE INLET SECTION TO THE OUTLET SECTION; MEANS FOR VARYING THE POSITION OF SAID POPPET TO CHANGE THE OPERATIVE NUMBER OF SLITS; AND AN ENLARGED AUXILIARY FLOW PASSAGE IN SAID POPPET FOR CONNECTING SAID SECTIONS FOR NON-MODULATED INCREASED FLOW AT A PREDETERMINED POSITION IN THE MOVEMENT OF SAID POPPET, SAID AUXILIARY PASSAGE HAVING OPPOSITE END OPENINGS IN THE POPPET OUTER SURFACE IN SPACED RELATION AXIALLY OF THE POPPET, SAID PASSAGE OPENINGS BEING AT A LOCATION AXIALLY OF THE POPPET IN RELATION TO SAID SLITS WHEREIN BOTH OPENINGS WILL COMMUNICATE WITH SAID OUTLET SECTION DURING MODULATING MOVEMENTS OF SAID POPPET, AND AT SAID PREDETERMINED POSITION OF THE POPPET WILL HAVE ONE OPENING POSITIONED IN THE INLET SECTION AND THE OTHER IN THE OUTLET SECTION SO THAT THE AUXILIARY PASSAGE PROVIDES A BY-PASS WITH RESPECT TO SAID CIRCUMFERENTIAL SEAL MEMBER.