Flush toilet

Patent metadata

Field	Value
Publication number	US-11473283-B2
Application number	US-202117411436-A
Country	US
Kind code	B2
Filing date	Aug 25, 2021
Priority date	Aug 28, 2020
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

A flush toilet includes a toilet main body and a tank device. The tank device includes a water supply unit a storage tank, a pump, and a suction pipe. The water supply unit is configured to supply the flush water the storage tank while the pump is being driven. The storage tank includes a large tank section that includes a lowest bottom surface of the storage tank and that is a large-capacity side, and a small tank section that is a small-capacity side. The storage tank main body includes a water supply port on an upper surface of the storage tank. The water supply unit is configured to supply the flush water to the storage tank through the water supply port. The water supply port of the storage tank and an upstream-end opening of the suction pipe are both provided on a large tank section side.

First claim

What is claimed is:

1. A flush toilet for discharging waste with flush water, the flush toilet comprising:
a toilet main body including a bowl configured to receive waste, a rim formed at a top edge of the bowl, and a discharge trap configured to discharge the waste in the bowl; and
a tank device configured to supply the flush water to the toilet main body, the tank device being provided behind the toilet main body, wherein
the tank device includes
a storage tank main body provided behind the toilet main body and above a floor surface,
a water supply unit configured to supply the flush water supplied from a water supply source to the storage tank main body,
a pump provided on a downstream side of the storage tank main body, the pump being configured to feed the flush water from the storage tank main body to the toilet main body under pressure, and
a suction pipe including an upstream-end opening provided in the storage tank main body, the suction pipe being configured to allow suction of the flush water in the storage tank main body from the upstream-end opening to a pump side by operation of a drive unit of the pump,
wherein the water supply unit is configured to supply water to the storage tank main body while the pump is being driven,
the storage tank main body includes a large tank section on a large-capacity side and a small tank section on a small-capacity side, the large tank section including a lowest bottom surface of the storage tank main body, and
the storage tank main body includes a water supply port on an upper surface of the storage tank main body, the water supply unit being configured to supply the flush water to the storage tank main body through the water supply port, and the water supply port of the storage tank main body and the upstream-end opening of the suction pipe are both provided on a large tank section side.

2. The flush toilet according to claim 1 , wherein
the storage tank main body has a shape that is asymmetrical in a left-right direction due to the large tank section and the small tank section, the large tank section being provided on a large-capacity side of the storage tank main body that is divided into two at a center in the left-right direction, the small tank section being provided on a small-capacity side of the storage tank main body that is divided into two at the center in the left-right direction, and
the water supply port of the storage tank main body is provided in an upper surface of the large tank section, and the suction pipe is provided in the large tank section.

3. The flush toilet according to claim 1 , wherein the storage tank main body includes a collision area where the flush water supplied from the water supply unit into the storage tank main body collides, and the collision area is configured to allow at least a part of the flush water to flow toward the upstream-end opening of the suction pipe after collision.

4. The flush toilet according to claim 3 , wherein the suction pipe further includes a downstream-end opening that is provided on the pump side, a transverse pipe part that horizontally extends in a left-right direction from the downstream-end opening, and a vertical pipe part that extends from one end side of the transverse pipe part to the upstream-end opening, where the collision area is provided on a circumferential surface, of the transverse pipe part, disposed below the water supply port, and an outer circumferential surface of the vertical pipe part is formed to extend obliquely downward, in a side view, toward the upstream-end opening from a connection portion to the transverse pipe part.

Assignees

• Toto Ltd

Inventors

• Tone Yusuke
• Kashirajima Shu

Classifications

• E03D11/02

  Water-closet bowls (auxiliary chambers with connections to flushing water for bowl-cleaning utensils E03D9/06; modified for using upwardly-directed sprays E03D9/08; seats or covers A47K13/00 ){; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl (parts or details of bowls E03D11/13)} · CPC title

• E03D1/012

  Details of shape of cisterns, e.g. for connecting to wall, for supporting or connecting flushing-device actuators {(mounting frames with incorporated cisterns E03D11/146)} · CPC title

• E03D2201/40

  Devices for distribution of flush water inside the bowl · CPC title

• E03D1/26 Primary

  Bowl with flushing cistern mounted on the rearwardly extending end of the bowl (shape or material of the cistern E03D1/01; constructional features of the bowl E03D11/02 - E03D11/12) · CPC title

• E03D1/38

  Adaptations or arrangements of flushing pipes (noise-absorbing means in pipe systems F16L55/00 {; noise-reducing means in the flushing mechanism not in combination with flushing valves E03D11/00; provisions in the flushing pipe for evacuating leakage water from the cistern}) · CPC title