Pressure relief valve

Claim 1

A VALVE, COMPRISING, A BODY MEMBER HAVING A WALL SURFACE FORMING A VALVE RECEIVING CHAMBER THEREIN AND HAVING A FLUID FLOW PORT EXTENDING FROM THE CHAMBER, SAID CHAMBER HAVING SAID CHAMBER WALL SURFACE ADJACENT THE JUNCTURE THEREOF WITH THE SAID PORT FORMED ARCUATELY AND CONCAVELY WIH SAID PORT AT THE AXIS OF THE CONCAVITY OF THE SAID CHAMBER WALL SURFACE, A VALVE MEMBER HAVING A FIRST CONVEXLY FORMED WALL SURFACE PORTION CONFORMING WITH SAID ARCUATE CONCAVITY OF SAID CHAMBER WALL SURFACE DISPOSED IN COAXIAL JUXTAPOSITION THERETO, AN ANNULUS OFF RESILIENT MATERIAL POSITIONED BETWEEN SAID VALVE MEMBER AND SAID CHAMBER WALL SURFACE AND SEATING ON EACH TO PREVENT FLUID FLOW THROUGH SAID PORT, SAID VALVE MEMBER HAVING A SECOND WALL SURFACE PORTION SPACED FROM SAID FIRST WALL SURFACE PORTION AND FORMED WITH AN ARCUATE CONCAVITY THEREIN COAXIAL WITH SAID CONVEXLY FORMED FIRST WALL SURFACE PORTION, A RESILIENT SELF-SUPPORTING BODY POSITION IN SAID CONCAVITY IN SID SECOND WALL SURFACE PORTION, AND YIELDABLE MEANS FOR APPLYING UNIFORMLY A FORCE AGAINST SAID SELF-SUPPORTING BODY FOR CAUSING SAID BODY TO BEAR RESILIENTLY AGAINST SAID VALVE MEMBER AND TO DISTRIBUTE UNIFORMLY THE SEALING PRESSURE APPLIED AGAINST SAID ANNULUS BY SAID VALVE MEMBER.