An automatic flusher includes an object sensor. When the object sensor detects a target meeting certain criteria, battery-powered control circuitry causes the flusher's valve to open. By pressing a push button, a user can make the circuit open the flusher's valve. If the circuit has been pressed continually...http://www.google.es/patents/US6619614?utm_source=gb-gplus-sharePatente US6619614 - Automatic flow controller employing energy-conservation mode
