Patent ID: 7407147

Claim:
An automatic actuation apparatus for a valve body having a water inlet, and a water outlet and a water chamber communicating between said water inlet and said water outlet, wherein said automatic flush actuation apparatus comprises: a valve member adapted for being disposed in said water chamber to control said water flowing from said water inlet to said water outlet; and a powering assembly, comprising: a power generator; 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 extended along said valve member to communicate said water chamber with said water outlet and comprises a valve stopper and a resilient element disposed in said water passage for applying an urging force against said valve stopper to normally retain said valve stopper on said valve member so as to close said water passage for controlling said water flowing from said water inlet to said water outlet; 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 valve stopper is sealedly retained to close said water passage 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 has a curved contacting surface and is arranged to be driven to rotate via said power generator, wherein at said auto-operated closed position, said valve stopper is retained by said resilient element at an opening of said water passage for blocking said water passing to said water outlet, wherein when said valve stopper is moved by said driving end portion of said actuator to said auto-operated opened position, said valve stopper is contacted with said curved contacting surface of said actuator and moved to an offset position from said opening of said water passage for allowing said water passing to said water outlet.