Fluid valve

Claim 1

A VALVE COMPRISING: A VALVE BODY HAVING A FLUID INLET, A FLUID OUTLET, AND A FLUID PASSAGE THEREBETWEEN INCLUDING A BORE LEADING FROM SAID INELT, AND A DOWNSTREAM PASSAGE PORTION OF LARGER CROSS SECTION THAN SAID BORE LEADING BEYOND SAID BORE TOWARD SAID OUTLET, AN ANNULAR SEATING FACE ON SAID BODY AROUND SAID BORE FACING TOWARD SAID DOWNSTREAM PORTION OF SAID FLUID PASSAGE, A SEATING ANNULUS IN SAID BODY AROUND SAID BORE POSITIONED ADJACENT SAID SEATING SURFACE, A VALVE POPPET GUIDED FOR AXIAL MOVEMENT TOWARD AND FROM SAID SEATING ANNULUS, SAID POPPET EMBODYING AN ANNULAR HEAD HAVING A FRONT, ANNULAR, COAXIAL SEATING EDGE PROJECTING THEREFROM TOWARD SAID SEATING ANNULUS AND BEING SEALINGLY ENGAGEABLE THEREWITH, SAID POPPER HEAD HAVING AN ANNULAR SURFACE REARWARD OF THE PLANE OF SAID ANNULAR SEATING EDGE AND RADIALLY OUTSIDE THEREOF, SAID ANNULAR SURFACE HAVING A PROJECTED AREA FACING IN THE SAME DIRECTION AS SAID SEATING EDGE, WALL MEANS FIXED WITH SAID VALVE BODY PRESENTING AN ANNULAR WALL SURFACE COAXIAL WITH SAID ANNULAR SURFACE ON SAID POPPET HEAD AND AT SLIGHT SPACING DISTANCE FROM SAID ANNULAR SURFACE ON SAID POPPET HEAD WHEN SAID SEATING EDGE IS IN ENGAGEMENT WITH SAID SEATING ANNULUS, IN SUCH ARRANGEMENT AS TO AFFORD IN SUCH POSITION, IN A ZONE BETWEEN SAID ANNULAR SURFACES ON SAID POPPET HEAD AND WALL MEANS AND OUTSIDE SAID SEATING EDGE, A FLUID SPACE OF RELATIVELY SMALL VOLUME INTO WHICH FLUID IS ADMITTED WHEN SAID SEATING EDGE SEPARATES SLIGHTLY FROM SAID SEATING ANNULUS, AND CONICAL SPRING WASHER MEANS, OF VARIABLE SPRING RATE, SEATED IN SAID VALVE BODY FOR URGING SAID POPPET TO A POSITION OF ENGAGEMENT OF ITS ANNULAR SEATING EDGE WITH SAID SEATING ANNULUS.