Patent ID: 8640272

Claim:
A flush toilet bowl comprising: a bowl portion including a pooling portion in communication with a drain conduit; a rim surface provided above the bowl portion; a first slit opening configured to spout flush water supplied through a first conduit toward the bowl portion and to spout the supplied flush water in a generally tangential direction of the rim surface, thereby generating a swirling flow swirling at the lower edge of the rim surface; a second slit opening configured to spout flush water supplied through the first conduit toward the bowl portion and to spout the supplied flush water in a generally tangential direction of the rim surface, thereby generating a swirling flow swirling at the lower edge of the rim surface; and a center slit opening provided between the first slit opening and the second slit opening and configured to spout flush water to the bowl portion, a slit opening shape in a cross section generally perpendicular to a flow direction of water flow spouted from the first slit opening being horizontally flattened, a slit opening shape in a cross section generally perpendicular to a flow direction of water flow spouted from the second slit opening being horizontally flattened, a swirling direction of the swirling flow spouted from the second slit opening being opposite to a swirling direction of the swirling flow spouted from the first slit opening, and the first slit opening, the center slit opening, and the second slit opening being continuous.