Fluid pressure seal rings

Claim 1

SEAL MEANS IN AN ENGINE FOR RESTRICTING THE FLOW OF FLUID FROM A HIGH PRESSURE SIDE TO A LOW PRESSURE SIDE OF TWO MATING CYLINDRICAL ENGINE PARTS WHICH MOVE FREELY WITH RESPECT TO EACH OTHER, SAID SEAL MEANS COMPRISING A SEAL RING AND MECHANICAL SPRING MEANS FOR SEATING SAID SEAL RING IN AND CONNECTING IT TO ONE OF SAID MATING PARTS CLOSELY ADJACENT THE SECOND SAID MATING PART, SAID SEAL RING HAVING AN ARCHED SURFACE AND PERFORATIONS THERETHROUGH PROVIDING CONVERGING NOZZLE MEANS AND FLUID BEARING SURFACE MEANS CAUSING A VERY SMALL FLOW OF SAID FLUID PAST SAID SEAL RING TO OPPOSE SAID SPRING FORCE AND TO REDUCE THE CLEARANCE BETWEEN SAID SEAL RING AND ITS SAID SECOND MATING PART, THUS REDUCING SAID FLOW TO A MINIMUM, SAID FLUID THAT DOES FLOW BETWEEN SAID BEARING SURFACE AND SAID SECOND MATING PART THEREBY SERVING TO LUBRICATE THESE SURFACES AND TO PREVENT METAL-TO-METAL CONTACT AS SAID MATING PARTS MOVE FREELY RELATIVELY TO EACH OTHER.