Ball and socket joint

Claim 1

A BALL AND SOCKET JOINT FOR INTERCONNECTING TWO RELATIVELY MOVING MEMBERS COMPRISING: A GENERALLY TUBULAR SOCKET MEMBER HAVING AN INTERNAL FLANGE PORTION AT ONE END AND ADAPTED FOR ATTACHMENT TO ONE OF SAID TWO RELATIVELY MOVING MEMBERS TO BE INTERCONNECTED BY SAID JOINT, SAID TUBULAR SOCKET MEMBER HAVING A HOLLOW INTERIOR WALL OF GENERALLY CIRCULAR TRANSVERSE CROSS-SECTION WHICH TAPERS FROM A RELATIVELY SMALL DIAMETER ADJACENT SAID INTERNAL FLANGE PORTION TO A RELATIVELY LARGE DIAMETER AT THE OPPOSITE END OF SAID TUBULAR SOCKET MEMBER FROM SAID INTERNAL FLANGE PORTION; A FIRST HIGH DENSITY SYNTHETIC RESIN BEARING INSERT MEMBER HAVING AN EXTERNAL SURFACE FORMED ON A FRUSTUM OF A CONE SO THAT SAID FIRST INSERT MEMBER TAPERS FROM A RELATIVELY LARGE DIAMETER TO A RELATIVELY SMALLER DIAMETER, SAID FIRST INSERT MEMBER HAVING A SUBSTANTIALLY HEMISPHERICAL SOCKET FORMED THEREIN AND LOCATED IN SAID TUBULAR SOCKET MEMBER WITH THE EXTERNAL SURFACE OF SAID FIRST INSERT MEMBER BEARING AGAINST THE TAPERED INTERNAL SURFACE OF SAID GENERALLY TUBULAR SOCKET MEMBER; A SECOND SYNTHETIC RESIN BEARING INSERT MEMBER HAVING A SUBSTANTIALLY FRUSTO-SPHERICAL SOCKET FORMED THEREIN, DEFINED BY AN APERTURE EXTENDING THERETHROUGH, SAID SECOND INSERT MEMBER HAVING AN EXTERIOR SURFACE BEARING AGAINST THE TAPERED INTERNAL WALL OF SAID TUBULAR SOCKET MEMBER, SAID SECOND INSERT MEMBER BEING LOCATED IN SAID TUBULAR MEMBER ADJACENT SAID INTERNAL FLANGE PORTION AND COOPERATING WITH, AND CONTACTING, SAID FIRST INSERT MEMBER TO FORM A SUBSTANTIALLY SPHERICAL CHAMBER WITHIN THE TWO CONTACTING INSERT MEMBERS; A SUBSTANTIALLY SPHERICAL BALL MEMBER HAVING A BALL PORTION POSITIONED IN SAID CHAMBER AND HAVING A SPINDLE PORTION PROJECTING FROM SAID BALL PORTION AND THROUGH SAID APERTURE IN SAID SECOND INSERT MEMBER, SAID SPINDLE PORTION BEING ADAPTED FOR ATTACHMENT TO THE OTHER OF SAID TWO RELATIVELY MOVING MEMBERS; A HIGH DENSITY SYNTHETIC RESIN SHEATH AROUND THE BALL PORTION OF SAID BALL MEMBER AND A PART OF THE SPINDLE PORTION OF SAID BALL MEMBER, SAID SYNTHETIC RESIN SHEATH EXTENDING THROUGH THE APERTURE IN SAID SECOND INSERT MEMBER AND BEING CONSTRUCTED OF A SYNTHETIC RESIN DIFFERING FROM THE SYNTHETIC RESINS FROM WHICH SAID FIRST AND SECOND INSERT MEMBERS ARE CONSTRUCTED; AND