Patent ID: 6840496

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, wherein said flush valve comprises: a valve member adapted for being sealedly disposed on said valve seat; and a sensor-operated powering assembly, comprising: a housing adapted for mounting on said valve body; a replaceable power source received in the 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 disposed on said valve member to normally close said water passage for controlling said water flowing from said water inlet to said water outlet, wherein said valve stopper, having a ball-shape, sits on said valve member at an opening of said water passage 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 dosed position and an auto-operated opened position, wherein at said auto-operated closed position, said valve stopper is sealedly closed for blocking said water passing to said water outlet, and at said auto-operated opened position, said valve stopper is moved to an opened position by said actuator for releasing said water pressure within said water chamber to allow said water passing to said water outlet, wherein said actuator has a driving end portion downwardly and rotatably extended from a bottom side of said housing to contact with said valve stopper, wherein said driving end portion of the actuator, having a semi-circular cross section, has a flat contacting surface and a curved contacting surface and is arranged to be driven to rotate via said power generator to move said valve stopper at said auto-operated closed position that said valve stopper Is contacted with said flat contacting surface of said actuator to retain said valve stopper at said opening of said water passage for blocking said water passing to said water outlet, and to move said valve stopper at said auto-operated opened position that said valve stopper is contacted with said curved contacting surface of said actuator to move said valve stopper to an offset position from said opening of said water passage for allowing said water passing to said water outlet.