Patent ID: 8042202

Claim:
A bathroom flusher, comprising: a flusher body having an inlet and an outlet, a valve assembly in said body positioned to close water flow between said inlet and outlet upon sealing action of a moving member at a valve seat thereby controlling said water flow from said inlet to said outlet, a pilot chamber constructed to control movement of said moving member, and an actuator system for actuating operation of said moving member by releasing pressure in said pilot chamber and thereby initiating movement of said moving member, said actuator system, comprising: a battery for powering said actuator system; an electromagnetic actuator including a solenoid coil and an armature housing constructed and arranged to receive an elongated armature arranged in a linearly movable relationship; a controller coupled to a power driver constructed to provide a drive signal to said solenoid coil for displacing said armature and thereby controlling said water flow; and an actuator sensor constructed and arranged to sense said armature due to voltage induced by movement of said armature and provide a sensor signal to said controller, said controller being constructed to provide said drive signal at various levels depending on said sensor signal.