Abstract: A float rise speed control tank in a flush toilet is formed so that when the flush water level inside a flush water tank rises and the flush water level reaches a window due to supply of flush water into the flush water tank by a water supply device, the inflow into the float rise speed control tank by flush water in the flush water tank from a window formed above the bottom edge part of the float causes the rise speed of the flush water level in the float rise speed control tank to increase more than the rise speed of the flush water in the flush water tank.

Abstract: A float rise speed control tank in a flush toilet is formed so that when the flush water level inside a flush water tank rises and the flush water level reaches a window due to supply of flush water into the flush water tank by a water supply device, the inflow into the float rise speed control tank by flush water in the flush water tank from a window formed above the bottom edge part of the float causes the rise speed of the flush water level in the float rise speed control tank to increase more than the rise speed of the flush water in the flush water tank.

Abstract: Disclosed is a vacuum breaker having further enhanced reliability. The vacuum breaker comprises: a main body having a water inlet (26, 41), a water outlet (34, 48), a water passage (30, 44) for fluidically connecting the water inlet and the water outlet, and a first ambient-air intake port (36, 50) and a second ambient-air intake port (37, 49) for allowing the water passage to fluidically communicate with ambient air therethrough; a first valve element (28, 42); and a second valve element (32, 46) disposed downstream of the first valve element.

Abstract: Disclosed is a vacuum breaker having further enhanced reliability. The vacuum breaker comprises: a main body having a water inlet (26, 41), a water outlet (34, 48), a water passage (30, 44) for fluidically connecting the water inlet and the water outlet, and a first ambient-air intake port (36, 50) and a second ambient-air intake port (37, 49) for allowing the water passage to fluidically communicate with ambient air therethrough; a first valve element (28, 42); and a second valve element (32, 46) disposed downstream of the first valve element.

Abstract: The present invention provides a novel water spray technique that extends a cleansing area in a two-dimensional manner without moving a nozzle. A nozzle head 170 has a water swirling chamber 171, which is located immediately below a nozzle opening 31 and connects with the nozzle opening 31 via a small-diametral connection pipe 163. The water swirling chamber 171 is formed as a hollow room having a tapered inner wall. A head flow path 34 is eccentrically connected to the water swirling chamber 171. Cleansing water flowed through the head flow path 34 into the water swirling chamber 171 swirls along the tapered inner wall of the water swirling chamber 171 as shown by the arrow SY and is sprayed from the nozzle opening 31 in a spiral (cone-shaped) form.