Patent ID: 6923424

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, having a flush channel, 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 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 to sealedly sit at said valve seat for blocking said water passing to said water outlet, and at said manual-operated opened position, said valve member 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 mounted on said valve body; a replaceable power source received in said housing; a power generator received in said housing; 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 communicating said water chamber with said water outlet and comprises a valve stopper disposed on said valve member to normally close said water passage and a resilient element biasing against said valve stopper so as to normally retain said valve stopper at an opening of said water passage to close said water passage; and an actuator driven by said power generator to move said valve stopper between an auto-operated closed position and an auto-operated opened position, wherein at said auto-operated closed position, said valve stopper retains at said opening of said water passage for blocking said water passage to said water outlet so as to normally close said water passage, and at said auto-operated opened position, said valve stopper is moved by said actuator to an offset position from said opening of said water passage for releasing said water pressure within said water chamber to allow said water passing to said water outlet.