Toilet flushing mechanism

Claim 1

A FLUSHING MECHANISM FOR A TOILET TANK HAVING A WATER SUPPLY PIPE, A DISCHARGE PIPE, AND A FLUSHING HANDLE, SAID MECHANISM COMPRISING A SUPPORTING STRUCTURE HAVING A BASE MEMBER ATTACHED TO AND COMMUNICATION WITH SAID DISCHARGE PIPE, SAID BASE MEMBER BEING PROVIDED WITH A VALVE SEAT, A BUOYANT DISCHARGE VALVE SEATED ON SAID VALVE SEAT, A ROD ATTACHED TO SAID DISCHARGE VALVE AND PROJECTING UPWARDLY THEREFROM, SAID SUPPORTING STRUCTURE INCLUDING AT LEAST ONE UPRIGHT MEMBER RISING VERTICALLY FROM SAID BASE MEMBER ALONGSIDE SAID VALVE SEAT, A PAIR OF VERTICALLY SPACED HORIZONTAL MEMBERS ATTACHED TO SAID UPRIGHT MEMBER AND PROJECTING LATERALLY THEREFROM SO AS TO OVERHANG SAID VALVE SEAT, AN ELONGATED VERTICAL GUIDE TUBE ATTACHED TO AND EXTENDING BETWEEN SAID HORIZONTAL MEMBERS, SAID GUIDE TUBE SURROUNDING SAID ROD AND SLIDABLY ENGAGING THE SAME FOR THE GREATER PART OF ITS LENGTH, AN ANNULAR FLOAT SURROUNDING SAID GUIDE TUBE BETWEEN SAID VERTICALLY SPACED HORIZONTAL MEMBERS, SAID FLOAT BEING SLIDABLE VERTICALLY ALONG SAID GUIDE TUBE BETWEEN A RAISED POSITION CLOSELY ADJACENT THE UPPER HORIZONTAL MEMBER AND A LOWERED POSITION ADJACENT THE LOWER HORIZONTAL MEMBER, A REFILL VALVE MOUNTED ON SAID SUPPORTING STRUCTURE AND CONNECTED TO SAID WATER SUPPLY PIPE, LINKAGE MEANS CONNECTING SAID FLOAT TO SAID REFILL VALVE TO OPEN THE LATTER WHEN SAID FLOAT IS BELOW SAID RAISED POSITION, AND MEANS CONNECTING THE TOP END OF SAID ROD TO SAID FLUSHING HANDLE, WHEREBY ACTUATION OF THE LATTER CAUSES SAID ROD TO BE LIFTED AND THEREBY RAISED SAID BUOYANT DISCHARGE VALVE FROM ITS SEAT, SAID DISCHARGE VALVE BEING ACCURATELY GUIDED BACK ONTO ITS SEAT BY THE EXTENDED BEARING CONTACT OF SAID GUIDE TUBE ON SAID ROD ALONG THE GREATER PART OF THE LENGTH THEREOF.