DRAIN VALVE DEVICE, WASHING WATER TANK DEVICE WITH THE DRAIN VALVE DEVICE, AND WATER CLOSET WITH THE WASHING WATER TANK DEVICE

Japanese Patent JP2016172986

A

PROBLEM TO BE SOLVED: To provide a drain valve device capable of effectively restraining reduction in an instantaneous flow rate of washing water.SOLUTION: A drain valve device 8 includes: a body part 18 having a drain port part 14 attached to a drain port 6b formed on a washing water tank 6, and a valve element for opening and closing the drain port part; and a cylindrical body 20 attached to the body part. The cylindrical body includes a lower opening part 46 attached to the drain port part of the body part attached to the washing water tank, a bottom surface part 48 protruding to an outer peripheral side from the lower opening part and forming a bottom surface of the cylindrical body, a side wall part 50 protruding upward from the bottom surface part and surrounding the body part, and an upper opening part 52 continued to an upper end of the side wall part. A curved surface is formed on the upper opening part of the cylindrical body in such a manner of separating from the body part toward the upper end from the lower end.SELECTED DRAWING: Figure 4

SHINOHARA KOKI
TANIMOTO HIDEKI
KUBOZONO YUKINORI
ABE MAKOTO

JP2015053430A

September 29, 2016

March 17, 2015

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TOTO LTD

E03D1/34

JP2012072588A	2012-04-12
JPS6172144A	1986-04-14
JP2009019471A	2009-01-29
JP2011184993A	2011-09-22

US20040040080A1

2004-03-04

Koichi Tsujii
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa

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