Supply-line-sealed flush controller

Abstract

A remote valve ( ) controls relief of pressure by way from a pilot-valve chamber ( ) whose pressure in turn controls pressure relief pressure chamber ( ) by which a pressurized-water source holds a flush valve ( ) seated in a flush opening at the base of a toilet tank ( ). An actuator chamber defined by a housing ( ) and flexible diaphragms ( ) and ( ) contains an incompressible fluid, and the user's depression of a push button ( ) causes that fluid to be displaced through a check valve ( ) so as to displace a valve member ( ), which is coupled to one of the flexible diaphragms, from a sealing position to an unsealing position, where it permits flow from a valve inlet ( ) to a valve outlet ( ). This relieves the pressure that holds the flush valve ( ) closed. A spring ( ) biases the valve member ( ) to a rest position, to which it tends to return when the user releases the push button ( ). But the check valve ( ) restricts the incompressible fluid's flow path to a small bleed orifice ( ). This imposes a time delay before valve member ( ) can return to its sealing position and thus cause the flush valve ( ) again to close. The time delay ensures adequate flushing flow.