Oil regulation ring

Claim 1

A PISTON PROVIDED WITH AN OIL REGULATING RING GROOVE, IN COMBINATION WITH AN OIL REGULATING RING POSITIONED IN SAID GROOVE, THE OUTER SURFACE OF SAID RING HAVING SPACED PERIPHERAL SLIDING SURFACES SEPARATED BY A PERIPHERAL RECESS, AND THE INNER SURFACE OF SAID RING HAVING CONVERGENT SURFACES IN THE RADIALLY OUTER DIRECTIONS OF THE RING AND FORMING A RIDGE THEREBETWEEN, EACH OF SAID CONVERGING SURFACES COACTING WITH THE ADJACENT SIDE OF THE GROOVE TO FORM A CIRCUMFERENTIAL SPRING RECEIVING POCKET, AN ENDLESS CLOSELY COILED COMPRESSION SPRING POSITIONED IN EACH OF SAID POCKETS AND CONTACTING ONE OF SAID CONVERGING SURFACE AND THE ADJACENT SIDE OF THE GROOVE AND EXTERTING PRESSURE ON THE RING TO PRESS THE ADJACENT ONE OF SAID SLIDING SURFACE OUTWARDLY, SAID RING HAVING PASSAGE MEANS THERETHROUGH FROM THE RECESS TO THE SPRING RECEIVING POCKETS TO DRAIN OIL FROM THE RECESS, SAID RING BEING THIN IN THE RADIAL DIRECTION SO AS TO BE FLEXIBLE UNDER THE INFLUENCE OF SAID SPRINGS AND A CONFINING CYLINDER WALL, EACH SAID SPRING HAVING A CROSS SECTIONAL DIAMETER LARGE ENOUGH TO PREVENT THE OTHER SPRING FROM MOVING OVER SAID RIDGE AND INTO THE SAME POCKET THEREWITH.