Shaft coupling

Claim 1

A COMPOUND FLEXIBLE COUPLING FOR CONNECTING TWO SHAFTS IN END-TO-END RELATIONSHIP, COMPRISING FLANGES FOR SAID SHAFTS HAVING INNER FACES ON RADIAL PLANES, EACH FLANGE HAVING A SPLIT BUSHING WITH A TAPERED SURFACE, A HUB SURROUNDING SAID BUSHING AND HAVING A TAPERED SURFACE IN FACE-TO-FACE CONTACT WITH THE SURFACE ON SAID BUSHING, MEANS FOR URGING SAID SURFACES TOGETHER TO CONTRACT SAID BUSHING ABOUT THE SHAFT ON WHICH THE FLANGE IS MOUNTED, AN ANNULAR PERIPHERAL SHOULDER ON SAID FLANGE, AN ANNULAR FLEXIBLE ELEMENT HAVING SIDE WILLS EMBRACING SAID ANNULAR SHOULDERS AND EXTENDING CONTINUOUSLY BETWEEN SAID FLANGES, A RING SEATING AGAINST THE EXTERNAL SIDE OF SAID WALLS, A PLURALITY OF SCREWS SECUING SAID RINGS TO THE RESPECTIVE SHOULDER IN CLAMPING RELATIONSHIP WITH SAID SIDE WALLS, A PLURALITY OF FRUSTO-CONICALLY SHAPED EQUALLY SPACED LUGS ON THE INNER FACE OF ONE OF SAID HUBS, SAID LUGS BEING SPACED EQUALLY FROM ON ANOTHER AND FROM THE CENTER OF SAID HUB, SCREWS RETAINING SAID LUGS RIGIDLY ON SAID FACE, A RUBBER BUMPER MEMBER ON EACH OF SAID LUGS, AND A PLURALITY OF FRUSTO-CONICALLY SHAPED EQUALLY SAPCED LUGS DISPOSED ON THE INNER FACE OF THE OTHER OF SAID HUBS AND SPACED EQUALLY FROM ONE ANOTHER AND FROM THE CENTER OF SAID HUB, SAID SECOND MENTIONED LUGS BEING IN CLOSE PROXIMITY TO AND IN INTERLOCKING RELATIONSHIP WITH SAID FIRST MENTIONED LUGS AND NORMALLY SPACED THEREFROM, AND SAID FIRST AND SECOND MENTIONED LUGS BEING SO SPACED THAT THEY CONTACT ONE ANOTHER WITHIN THE NORMAL OPERATING LIMITS OF SAID FLEXIBLE ELEMENT.