Patent ID: 7437778

Claim:
A bathroom flusher comprising: a valve body having an inlet coupled to a water pipe 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 flow from said inlet to said outlet, an actuator including a solenoid coil and an armature housing constructed to receive a linearly movable armature constructed to be displaced between extended and retracted positions by a drive current delivered to said solenoid coil and thereby control said sealing action of said moving member, and a control circuitry, including a microcontroller, constructed and arranged to provide said drive current for actuating operation of said moving member, said microcontroller being connected to provide signals to and receive signals from said control circuitry and, said microcontroller being programmed to calculate water pressure in said water pipe at said inlet, based on a latch time of said linearly movable armature, and thereby control amount of water delivered by the bathroom flusher by initiating closing of said water flow after prior opening of said water flow by said moving member.