Automatic bathroom flushers with modular design

A method for converting a manually operated flush valve used with a urinal or toilet, comprising the acts of:

• providing a manually operated flush valve including a flush valve mechanism located within a valve body constructed and arranged to control water flow between a water inlet and a water outlet, a manual handle mechanically coupled to said valve mechanism and constructed to operate said valve mechanism upon pivotable displacement;
• closing an external water supply to said valve body;
• removing said manual handle and sealing a manual handle port;
• removing an external cover above said valve body, said external cover retaining said flush valve mechanism;
• attaching to said body an external cover designed for enclosing an electronic control module comprising a battery, and a sensor and enclosing an actuator for controlling operation of said flush valve, said external cover including at least two cover parts separately removable, said external cover being attachable with respect to said valve body in a manner also removably attaching said control module, and
• opening said external water supply to enable water flow to said valve body.

A method for servicing an automatic toilet room flush valve comprising the acts of:

• providing an automatic toilet room flush valve including:
• a valve body including an inlet and an outlet and a valve seat inside said body;
• a valve member cooperatively arranged with said valve seat, said valve member being constructed and arranged to control water flow between said inlet and said outlet, movement of said valve member between open and closed positions being controlled by water pressure inside a pilot chamber;
• and
• an external cover designed for enclosing a battery, a sensor and an actuator for controlling operation of said flush valve,
• removing a portion of said external cover while maintaining in place a sensor window included in said external cover, said sensor window being cooperatively arranged with said sensor;
• and
• adjusting sensitivity of said sensor while maintaining said sensor window in place designed for regular operation.

In an automatic toilet flush valve including a body having an inlet and an outlet, a valve assembly in said body constructed and arranged to open and close water flow from said inlet to said outlet upon actuation signals provided by an electronic system to an actuator, said automatic flush valve comprising:

• a pressure cap defining a pilot chamber in communication with said output via a relief passage controlled by said actuator;
• a sensor, included in said electronic system, constructed to detect a user located in front of said flush valve and designed to provide control signals to said electronic system, said electronic system being constructed to provide drive signals to said actuator;
• and
• a cover mounted above said pressure cap and constructed to provide housing for said electronic system, said cover being designed cooperatively with said electronic system to enable sensitivity adjustment of said sensor without removal of said cover.