Hinge assembly

Claim 1

IN A HINGE ASSEMBLY, A FIRST HINGE MEMBER COMPRISING A FIRST SLEEVE CLOSED AT ONE END AND THERE PROVIDED WITH AN INTERIOR CAM ELEMENT, SAID SLEEVE HAVING A CYLINDRICAL BORE EXTENDING FROM SAID CAM ELEMENT AND OPENING THROUGH ITS OTHER END AND BEING FURTHER PROVIDED AT ONE SIDE THEREOF WITH A MOUNTING LEAF; A SECOND HINGE MEMBER COMPRISING A SECOND SLEEVE OPPOSED TO THE OPEN END OF SAID FIRST SLEEVE AND HAVING A BORE OPENING THROUGH BOTH ITS INNER AND ITS OUTER ENDS; AND A CAM PIN AND A PINTLE PIN ALTERNATIVELY INSERTIBLE INTO SAID SECOND SLEEVE FROM THE OUTER END THEREOF, SAID PINS BEING RESPECTIVELY OF A LENGTH TO PROJECT BEYOND THE INNER END OF SAID SECOND SLEEVE WHEN OPERATIVELY MOUNTED THEREIN INTO SAID FIRST SLEEVE AND SAID CAM PIN HAVING A CAM ELEMENT DISPOSED TO SEAT ON SAID CAM ELEMENT OF SAID FIRST SLEEVE IN COOPERATING RELATION THEREWITH, WHEN SAID CAM PIN IS OPERATIVELY MOUNTED IN SAID SECOND SLEEVE, THE LATTER AND SAID PINS RESPECTIVELY HAVING COOPERATING MEANS FOR INTERCHANGEABLY SECURING SAID PINS IN SAID SECOND SLEEVE IN OPERATIVE POSITION THEREIN WHEREBY SAID ASSEMBLY MAY BE USED AS A GRAVITY HINGE AND AS A NON-GRAVITY HINGE OPTIONALLY.