Ball-and-socket joints

Claim 1

A BALL AND SOCKET JOINT COMPRISING A CYLINDRICAL HOUSING FORMING A SOCKET, A BALL PIN WITH A SPHERICAL HEAD DISPOSED IN SAID SOCKET, A FIRST SYNTHETIC PLASTIC RING SHAPED BEARING MEMBER DISPOSED IN SAID SOCKET BETWEEN SAID HEAD AND THE INNER SURFACE OF SAID HOUSING, A SECOND RING SHAPED BEARING MEMBER DISPOSED IN SAID SOCKET BETWEEN SAID HEAD AND SAID INNER SURFACE, SAID SECOND RING MEMBER CONSISTING OF A RESILIENT PAD OF COMPRESSED WOVEN TEXTILE MATERIAL IMPREGNATED WITH A LUBRICANT, SAID RING MEMBERS HAVING SUBSTANTIALLY FLAT PARALLEL FACING SURFACES IN CONTACT WITH EACH OTHER, AN INTERNAL SHOULDER ADJACENT ONE END OF SAID SOCKET AND A CLOSURE CAP ADJACENT THE OTHER END OF THE SOCKET RETAINING SAID RING MEMBERS IN CONTACT WITH EACH OTHER AND WITH SAID HEAD, SAID PLASTIC RING MEMBER HAVING CIRCUMFERENTIALLY SPACED PROTUBERANCES ON ITS FACE IN CONTACT WITH SAID PAD RING MEMBER, SAID PROTUBERANCES EXTENDING INTO AND EMBEDDED BELOW THE SURFACE OF SAID ABUTTING SURFACE OF SAID PAD RING MEMBER TO RESTRAIN SAID FIRST RING MEMBER FROM ROTATION WITH RESPECT TO SAID SECOND RING MEMBER.