Ball joint assembly for wheel suspension

Claim 1

IN A FRONT WHEEL SUSPENSION MECHANISM FOR AN AUTOMOBILE HAVING AN UPPER SUSPENSION ARM AND A SPINDLE WITH A SUPPORT MEMBER HAVING AN EYE AT ONE END, A BALL JOINT COMPRISING A BODY OF CAST METAL, A FLANGE ON SAID BODY HAVING A PLURALITY OF HOLES THEREIN FOR BOLTS FOR CONNECTING SAID BODY TO THE ARM, SAID BODY HAVING A DOWNWARDLY FACING SUBSTANTIALLY HEMISPHERICALLY SHAPED CHAMBER WITH A DOWNWARDLY EXTENDING THREADED OPENING, A METAL BALL SEATED IN SAID CHAMBER, A DOWNWARDLY EXTENDING STEM INTEGRALLY CONNECTED TO SAID BALL AND PASSING THROUGH SAID OPENING FOR RECEIVING SAID EYE, A NUT THREADEDLY RECEIVED ON THE END OPPOSITE SAID BALL FOR RETAINING SAID EYE ON SAID STEM, AN ANNULAR NYLON BUSHING SEATED IN SAID OPENING AGAINST SAID BALL AND HAVING THE INNER SURFACE THEREOF CURVED TO CONFORM TO THE CURVATURE OF SAID BALL, A RETAINER RING THREADEDLY RECEIVED IN SAID OPENING AND HAVING A SHOULDER FOR ENGAGING SAID BUSHING AND AN OUTWARDLY FACING ANNULAR GROOVE ON THE LOWER PERIPHERAL SURFACE, AND A FLEXIBLE CUP SHAPED MEMBER HAVING A CENTRAL HOLE AROUND SAID STEM AND A FLANGE FOR SEATING IN SAID GROOVE, SAID BODY HAVING UPPER AND LOWER LUBRICANT PORTS COMMUNICATING WITH SAID CHAMBER.