Patent ID: 6974118

Claim:
An automatic flush actuation apparatus for a flushing system which comprises a valve body having a water inlet, a water outlet, and a water chamber communicating between said water inlet and said water outlet, a valve seat normally sealed with said water chamber for retaining a predetermined water pressure within said water chamber so as to block water flowing from said water inlet to said water outlet, and a flush lever coupled with said valve body, wherein said flush valve comprises: a valve member adapted for being disposed at said valve seat to control said water flowing from said water inlet to said water outlet, wherein said valve member is capable of being moved by said flush lever between a manual-operated closed position and a manual-operated opened position, wherein at said manual-operated closed position, said valve member is arranged for sealedly sitting at said valve seat to block said water passing to said water outlet, and at said manual-operated opened position, said valve is moved to an opened position for releasing said water pressure within said water chamber to allow said water to pass from said water inlet to said water outlet through said water chamber; and a sensor-operated powering assembly, comprising: a housing, which is adapted for mounting on said valve body; a replaceable power source received in said housing; a power generator; a CPU electrically connected with said power generator and said power source for activating said power generator while sensing a presence of a user of said flushing system; a relief valve provided at said valve member for controlling said water flowing from said water inlet to said water outlet through said water chamber, wherein said relief valve has a water passage axially extended along said valve member for communicating said water chamber with said water outlet, and a valve stopper sitting on said valve member at an opening of said water passage in a free movable manner to normally close said water passage for retaining said water pressure within said water chamber; and an actuator driven by said power generator to move said relief valve between an auto-operated closed position and an auto-operated opened position, wherein at said auto-operated closed position, said relief valve is sealedly closed for blocking said water passing to said water outlet, and at said auto-operated opened position, said actuator moves said valve stopper aside that said opening of said water passage is unsealed for releasing said water pressure within said water chamber to allow said water passing to said water outlet, wherein after the flushing cycle is completed, said valve stopper is self-moved back to its original position to seal at said opening of said water passage.