Supply-line-sealed flush controller

摘要

A remote valve (46) controls relief of pressure by way from a pilot-valve chamber (38) whose pressure in turn controls pressure relief pressure chamber (24) by which a pressurized-water source holds a flush valve (12) seated in a flush opening at the base of a toilet tank (18). An actuator chamber defined by a housing (74) and flexible diaphragms (72) and (94) contains an incompressible fluid, and the user's depression of a push button (44) causes that fluid to be displaced through a check valve (100) so as to displace a valve member (102), 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 (104) to a valve outlet (48). This relieves the pressure that holds the flush valve (12) closed. A spring (101) biases the valve member (102) to a rest position, to which it tends to return when the user releases the push button (44). But the check valve (100) restricts the incompressible fluid's flow path to a small bleed orifice (112). This imposes a time delay before valve member (102) can return to its sealing position and thus cause the flush valve (12) again to close. The time delay ensures adequate flushing flow.