Oil pan and drain plug assembly

Claim 1

IN COMBIANTION WITH A THIN WALL RECEPTACLE HAVING A DRAIN APERTURE IN THE BOTTOM WALL THEREOF, A DRAIN CLOSURE COMPRISING A SUPPORT MEMBER MOUNTED WITHIN SAID RECEPTACLE AND HAVING A PERIPHERAL FLANGE PORTION DEFINING A PLURALITY OF ARCUATE FLANGE SEGMENTS SECURED TO SAID BOTTOM WALL IN RADIALLY SPACED CONCENTRIC RELATION TO THE DRAIN APERTURE, AND A PLURALITY OF PORT DEFINING LEGS EXTENDING UPWARDLY AND RADIALLY INWARDLY FROM SAID PERIPHERAL FLANGE PORTION AND SUPPORTING AN INTERNALLY THREADED CYLINDRICAL PORTION IN COAXIAL SPACED RELATION TO THE DRAIN APERTURE, SAID LEGS AND SAID CYLINDRICAL AND FLANGE PORTIONS COOPERATING TO DEFINE PRIMARY OIL DRAIN PORTS THEREBETWEEN AND SAID LEGS BEING TRANSVERSELY BOWED UPWARDLY AND COOPERATING WITH SAID BOTTOM WALL BETWEEN SAID FLANGE SEGMENTS TO DEFINE A PLURALITY OF SECONDARY OIL DRAIN PORTS, AND A DRAIN PLUG MEMBER HAVING A SHANK PORTION THREADABLY MOUNTED WITHIN SAID CYLINDRICAL SUPPORT PORTION AND A HEAD PORTION SEALINGLY AND FRICTIONALLY ENGAGEABLE WITH SAID BOTTOM WALL ADJACENT SAID APERTURE TO RESTRAIN OPENING ROTATION OF SAID DRAIN PLUG MEMBER.