Wedge type valves for fluids

Claim 1

A WEDGE-TYPE FLUID CONTROL VALVE, HAVING A VALVE SEAT, A WEDGE-SHAPED CLOSURE MEMBER MOVABLE TOWARD AND AWAY FROM A CLOSED POSTION TO CONTROL THE FLOW OF FLUID THROUGH THE VALVE, EACH FACE TO SAID CLOSURE MEMBER DIRECTED TOWARD THE VALVE SEAT, HAVING A RING SPACE THERIN, A SEALING RING FITTED TO SAID RING SPACE, SAID SEALING RING BEING OPERATIVE TO PROVIDE A METAL TO METAL SEAL CONTACT BETWEEN THE VALVE SEAT AND THE CLOSURE MEMBER, SAID SEALING RING BEING MOVABLE WITHIN SAID RING SPACE TOWARD AND AWAY FROM THE VALVE SEAT, A RESILIENTLY DEFORMABLE LOADING MEMBER LOCATED WITHIN THE PORTION OF THE RING SPACE BEHIND THE SEALING RING, THE PORTION OF THE RING SPACE OCCUPIED BY SAID LOADING MEMBER BEING OF SUBSTANTIALLY TRAPEZODIAL CROSS-SECTIONAL CONTOUR, THE RESILIENT LOADING MEMBER BEING OF SUCH SIZE AND SHAPE THAT IT DOES NOT COMPLETELY FILL SAID PORTION OF THE RING SPACE WHEN NOT UNDER LOAD, A RETAINING RING FIXEDLY AT TACHED TO THE CLOSURE MEMBER IN ENGAGEMENT WITH THE SEALING RING, SAID RETAINING RING BEING OPERATIVE TO RETAIN THE LOADING MEMBER WITHIN THE RING SPACE, SAID SEALING RING PROJECTING FROM SAID CLOSURE MEMBER BY SUCH A DISTANCE THAT IT WILL ENGAGE AND BE MOVED BY THE VALVE SEAT DURING THE PROCESS OF CLOSING THE VALVE.