Sockets for castors

Claim 1

A SOCKET FOR RECEIVING A CASTOR STEM THEREIN HAVING A SHOULDER ADJACENT ITS UPPER END COMPRISING A CYLINDRICAL ELONGATED PLASTIC RESILIENT SLEEVE WITH AN INTERNAL AND EXTERNAL SURFACE, SAID SLEEVE HAVING AN UPPER END AND AN OPEN LOWER END FOR INSERTING A CASTOR STEM THEREIN, SAID SLEEVE HAVING SOLID AXIAL SPLINES CIRCUMFERENTIALLY DISPOSED AND PROJECTING RADIALLY OUTWARDLY OF SAID EXTERNAL SURFACE ADJACENT SAID UPPER END FOR FRICTIONALLY GRIPPING THE WALLS OF A BORE OF AN ARTICLE IN WHICH SAID SLEEVE IS DISPOSED, A PLURALITY OF PROJECTIONS DISPOSED ON THE INTERNAL SURFACE OF SAID SLEEVE AND PROJECTING RADIALLY INWARDLY, SAID PROJECTIONS BEING DISPOSED AXIALLY IN SPACED RELATIONSHIP BELOW SAID SOLID AXIAL SPLINES AND ADAPTED TO BE POSITIONED BELOW THE SHOULDER OF A CASTOR STEM INSERTED INTO THE SLEEVE TO DETACHABLY CONNECT A CASTOR STEM TO THE SLEEVE, HOLLOWED OUT AXIAL RIBS CIRCUMFERENTIALLY DISPOSED AROUND THE LOWER END OF SAID SLEEVE IN SPACED RELATIONSHIP BELOW SAID PROJECTIONS, AN OUTWARDLY EXTENDING PERIPHERAL FLANGE DISPOSED ADJACENT THE LOWER EDGE OF SAID OPEN END OF THE SLEEVE FOR FORMING A BEARING SURFACE FOR A SHOULDER ON A CASTOR DETACHABLY CONNECTED TO SAID SLEEVE, AND A DISC SHAPED BEARING MEMBER IN SAID SLEEVE ADJACENT THE LOWER END OF SAID AXIAL SPLINES AND SPACED ABOVE SAID PROJECTIONS WHEREBY A RESILIENT SOCKET MEMBER IS PROVIDED FOR MAINTAINING ITS BORE DIAMETER WHEN COMPRESSED TO ALLOW A CASTOR STEM DISPOSED THEREIN TO SWIVEL FREELY.