Patent ID: 8209792

Claim:
A shut-off valve for connecting between a water supply valve and a tank inlet port of a toilet tank, comprising: a housing containing an inlet port adapted for fluid connection with the water supply valve, an outlet port adapted for fluid connection with the tank inlet port, a valve mechanism, a trip mechanism, and a trip circuit electrically connected with the trip mechanism; the valve mechanism including a valve housing rotationally confining a first disk and a second disk, each disk having at least one aperture therethrough, a compression spring holding the second disk coaxially against the first disk, the at least one aperture in each disk when aligned allowing fluid communication between the inlet and outlet ports; the trip mechanism including a rotational spring urging rotation of an axial shaft fixed coaxially with the second disk, a trip latch adapted to prevent rotation of the axial shaft and second disk except when withdrawn from the axial shaft by a solenoid electrically connected to the trip circuit, a stop to prevent rotation of the second disk beyond a preset rotational point, and a reset knob fixed with the rotational spring and axial shaft; the trip circuit including at least one trip sensor input and a power source; and at least one trip sensor adapted to sense a fault condition, each trip sensor selectively electrically connected to the trip sensor input; whereby when the trip circuit detects a fault condition on any of the at least one trip sensors, the trip circuit connects power to the solenoid to withdraw the trip latch from the axial shaft, the rotational spring rotating the second disk such that the apertures of each disk become misaligned, thereby fluidly isolating the inlet and outlet ports, the reset knob being rotatable outside of the toilet tank to reset tension in the rotational spring and rotate the second disk such that the at least one aperture of each disk become co-aligned.