Toilet tank supply valve assembly

Claim 1

A TOILET TANK SUPPLY VALVE ASSEMBLY COMPRISING A NORMALLY UPRIGHT CASING, A FLOAT MEMBER SUPPORTED ON SAID CASING FOR RISING AND FALLING MOVEMENT THEREALONG IN RESPONSE TO PREDETERMINED CHANGES IN THE LEVEL OF WATER IN AN ASSOCIATED TANK, A WATER INLET PASSAGE TO SAID CASING, A TANK FILLING WATER OUTLET PASSAGE FROM SAID CASING, A FIRST VALVE DEFINING A PRESSURE CHAMBER IN SAID CASING, SAID FIRST VALVE BEING MOVABLE TO A CLOSED POSITION CLOSING OFF SAID TANK FILLING WATER OUTLET PASSAGE FROM SAID INLET PASSAGE AND FROM SAID PRESSURE CHAMBER, A PRESSURE EQUALIZING PASSAGE PLACING SAID CHAMBER IN COMMUNICATION WITH SAID INLET PASSAGE WHEREBY SAID CHAMBER IS SUBJECT TO INLET PRESSURE WHEN SAID FIRST VALVE IS IN SAID CLOSED POSITION, SAID FIRST VALVE NORMALLY BEING HELD IN SAID CLOSED POSITION BY THE PRESSURE OF WATER IN SAID CHAMBER, A BLEED PASSAGE FROM SAID CHAMBER, A SECOND VALVE NORMALLY CLOSING SAID BLEED PASSAGE, MEANS CANTING SAID SECOND VALVE TO OPEN SAID BLEED PASSAGE UPON PREDETERMINED FALLING MOVEMENT OF SAID FLOAT MEMBER ON SAID CASING, SAID PRESSURE EQUALIZING PASSAGE BEING OF RESTRICTED SIZE RELATIVE TO SAID BLEED PASSAGE WHEREBY OPENING OF THE LATTER RELIEVES THE PRESSURE IN SAID CHAMBER FOR MOVEMENT OF SAID FIRST VALVE OUT OF SAID CLOSED POSITION TO OPEN SAID WATER OUTLET PASSAGE TO SAID INLET PASSAGE FOR FILLING AN ASSOCIATED TANK, SAID SECOND VALVE CLOSING SAID BLEED PASSAGE UPON PREDETERMINED RISING MOVEMENT OF SAID FLOAT MEMBER ON SAID CASING TO ENABLE THE BUILDUP OF PRESSURE IN SAID CHAMBER FOR MOVEMENT OF SAID FIRST VALVE TO SAID CLOSED POSITION, WHEREBY FILLING OF AN ASSOCIATED TANK IS CONTROLLED BY SAID FIRST VALVE WHICH LATTER IS HYDRAULICALLY CONTROLLED BY SAID FLOAT MEMBER THROUGH SAID SECOND VALVE.