US 12,000,131 B2
Flush toilet
Yuichi Tsubone, Fukuoka (JP); Chisato Sone, Fukuoka (JP); Hiroshi Hashimoto, Fukuoka (JP); Yuya Miyake, Fukuoka (JP); Shigeru Okada, Fukuoka (JP); and Kenichi Takano, Fukuoka (JP)
Assigned to TOTO LTD., Kitakyushu (JP)
Filed by TOTO LTD., Kitakyushu (JP)
Filed on Aug. 10, 2022, as Appl. No. 17/884,769.
Claims priority of application No. 2021-178358 (JP), filed on Oct. 29, 2021.
Prior Publication US 2023/0137859 A1, May 4, 2023
Int. Cl. E03D 11/16 (2006.01); E03D 11/18 (2006.01)
CPC E03D 11/16 (2013.01) [E03D 11/18 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A flush toilet, comprising:
a bowl part that includes a waste-receiving surface with a bowl shape and a rim part that is formed on an upper side of the waste-receiving surface;
a water spout part that is provided on the rim part and spouts washing water toward an inside of the bowl part;
a drainage water trap part that is connected to a bottom part of the bowl part and discharges waste in the bowl part; and
a water drainage socket that is provided with an upstream side that is connected to the drainage water trap part and a downstream side that is connected to a water drainage port of a floor surface where the water drainage socket includes a back side R part that changes a flow channel in such a manner that washing water that flows from an upper side is directed to a front side, a front side R part that is provided on a downstream side of the back side R part and changes a flow channel in such a manner that washing water that flows from a back side is directed to a lower side, and a water storage part that stores a part of washing water on a flow channel from the back side R part to the front side R part, wherein
the water drainage socket includes a throttle part that is provided on a downstream side of the front side R part and decreases a cross-sectional area of a flow channel of the front side R part, wherein
a center of a flow channel of the throttle part in a radial direction thereof is located on a front side of a center of a flow channel of a site where the throttle part is provided in the front side R part in a radial direction thereof.