Patents Assigned to Toto Ltd.
  • Patent number: 11697932
    Abstract: According to an embodiment, a toilet device includes a detector configured to detect at least one of a water level inside a flush toilet or an indicator associated with the water level, a clog determiner determining a clog state of the flush toilet based on a detection result of the detector, and a controller determining, based on a determination result of the clog determiner, whether or not to prohibit a flushing water supply to the flush toilet. The controller sets a flush prohibition time at least after the flushing water supply to the flush toilet has ended. A flush operation for flushing the flush toilet not is accepted temporarily in the flush prohibition time. The clog determiner determines the clog state of the flush toilet based on the detection result of the detector within the flush prohibition time or directly after the flush prohibition time.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: July 11, 2023
    Assignee: TOTO LTD.
    Inventors: Shoichi Tsuiki, Motoki Kobayashi, Yuya Masahira
  • Patent number: 11668084
    Abstract: A sanitary washing device includes a nozzle, a valve unit, a casing, a water supply hose, and a water supply connection part. The nozzle is configured to discharge water toward an ano-genital region. The valve unit is provided on a pipe line between a water supply source and the nozzle. The valve unit includes an electromagnetic valve. The water supply hose is configured to supply water from the water supply source into the casing. The water supply hose is flexible. The water supply connection part connects the water supply hose and the valve unit. The casing has a concave portion recessed upward from a bottom surface of the casing. The concave portion has an upper surface and a side surface extending from the upper surface and facing backward or sideward. The water supply connection part is provided on the side surface of the concave portion.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: June 6, 2023
    Assignee: TOTO LTD.
    Inventors: Saki Yamamura, Takeshi Yamakawa, Masayuki Mochita
  • Patent number: 11648572
    Abstract: The present invention is a shower head for which a plurality of spout modes can be switched. The shower head includes: a storage chamber configured to store water supplied from a water supply source; a secondary-side flow-path member provided on a spout-surface side with respect to the storage chamber, the secondary-side flow-path member having a plurality of flow paths, each of which corresponds to each of the plurality of spout modes; and a plurality of diaphragm valves, each of which is configured to control a communicated/blocked state between each of the plurality of flow paths and the storage chamber.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: May 16, 2023
    Assignee: TOTO LTD.
    Inventors: Hideyuki Matsui, Masanobu Kanashiro
  • Patent number: 11643799
    Abstract: A flush toilet of the present invention includes: a bowl including a waste receiving surface, a rim and a shelf surface, the shelf surface of the bowl including linear portions formed on a right side and a left side, a front arc portion connected to front ends of the linear portions, and a rear arc portion connected to rear ends of the linear portions; a rim spout portion spouting flush water to the shelf surface to form a circulating flow; and the like. Flush water is spouted backward from the rim spout port along the linear portions of the shelf surface; and the shelf surface and the waste receiving surface are coupled by an inner coupling portion, and a curvature radius of the inner coupling portion along a vertical direction is set to a smaller value on a rear end of the bowl than on a front end thereof.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: May 9, 2023
    Assignee: TOTO LTD.
    Inventor: Wataru Ishimi
  • Patent number: 11624178
    Abstract: A flush toilet in which a comparatively large storage region that stores a functional unit can be formed in a region in more rear side than a bowl of a toilet main body, while improving designability of the whole flush toilet is provided. A toilet main body of a flush toilet includes a skirt and a rear function storage portion, the skirt includes an opening, the opening being formed in a portion of an upper part of an outer wall of the skirt, the opening allowing the rear function storage portion inside the skirt to open toward outside the skirt, and a part of the functional unit stored in the rear function storage portion forms an outer surface to close the opening.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: April 11, 2023
    Assignee: TOTO LTD.
    Inventors: Yusuke Eto, Takahiro Maruyama
  • Patent number: 11623898
    Abstract: According to an aspect of the invention, there is provided a plasma-resistant member including: a base member; and a layer structural component formed at a surface of the base member, the layer structural component including an yttria polycrystalline body and being plasma resistant, the layer structural component including a first uneven structure, and a second uneven structure formed to be superimposed onto the first uneven structure, the second uneven structure having an unevenness finer than an unevenness of the first uneven structure.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: April 11, 2023
    Assignee: Toto Ltd.
    Inventors: Junichi Iwasawa, Toshihiro Aoshima
  • Patent number: 11626310
    Abstract: According to one embodiment, an electrostatic chuck includes a ceramic dielectric substrate, a base plate, and a first porous part. The ceramic dielectric substrate has a first major surface and a second major surface on opposite side from the first major surface. The base plate supports the ceramic dielectric substrate and includes a gas feed channel. The first porous part is provided at a position between the base plate and the first major surface of the ceramic dielectric substrate. The position is opposed to the gas feed channel. The first porous part includes a plurality of sparse portions each including a plurality of pores. The plurality of sparse portions are spaced from each other. Each of the plurality of sparse portions extends in a direction inclined by a prescribed angle with respect to a first direction from the base plate to the ceramic dielectric substrate.
    Type: Grant
    Filed: September 19, 2019
    Date of Patent: April 11, 2023
    Assignee: Toto Ltd.
    Inventors: Jun Shiraishi, Shuichiro Saigan, Tatsuya Mori, Masahiro Watanabe
  • Publication number: 20230100206
    Abstract: A flush toilet includes a bowl including a waste receiving surface, a rim and a well portion; a water spouting part that spouts flush water toward the bowl; and a water discharge trap including an inlet connected to a lower part of the well portion, the water discharge trap discharging waste in the bowl, the well portion includes a bottom wall formed above and in front of the inlet of the water discharge trap, a side wall formed to surround a periphery of the bottom wall, and a joining portion that joins an outer edge of the bottom wall and a bottom edge of the side wall with a surface having a curvature, and the bottom wall of the well portion includes a concave portion formed to recess downward on left and right sides with respect to a center axis in a left-right direction in a front sectional view.
    Type: Application
    Filed: September 9, 2022
    Publication date: March 30, 2023
    Applicant: TOTO LTD.
    Inventors: Hiroshi HASHIMOTO, Kenichi NAKAMURA, Shinichi URATA, Kazunari YASUI, Isami SAKABA, Yuichi TSUBONE, Shigeru OKADA, Satoshi YAMAZAKI
  • Patent number: 11607175
    Abstract: According to the embodiment, a toilet seat device includes a toilet seat and a biological sensor. The toilet seat that is formed of a resin material and includes a seating part on which a user is seated, and a bottom surface part facing the seating part. The biological sensor that is of an optical type, is positioned inside the toilet seat, and detects biological information of the user seated on the seating part. The seating part includes a thick portion and a thin portion. The thin portion is thinner than the thick portion. The biological sensor is located at a back surface side of the thin portion. The thick portion and the thin portion are formed as a continuous body. The thin portion has a thickness that can transmit irradiated light irradiated from the biological sensor and reflected light reflected from the user seated on the seating part.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: March 21, 2023
    Assignee: TOTO LTD.
    Inventor: Yo Morotomi
  • Patent number: 11598079
    Abstract: A flush toilet includes a toilet main body and a control unit. The toilet main body includes a skirt, a rear storage configured to store at least a part of the control unit, and an opening to which a drain pipe is connected is formed penetrating, in a front-rear direction, a portion below a center in a left-right direction of a rear wall of the skirt. The rear storage forms a discharge socket storage on a front side of the opening in a region below a center of the rear storage in the left-right direction. And a side wall surface in the discharge socket storage protrudes more in a center direction of the opening than a side wall surface in the opening, to reduce an opening cross-sectional area of the discharge socket storage to be smaller than an opening cross-sectional area of the opening.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: March 7, 2023
    Assignee: TOTO LTD.
    Inventors: Takahiro Maruyama, Wataru Ishimi
  • Publication number: 20230066417
    Abstract: The present invention provides a flush toilet device (1) including: a flush toilet (2); a flush water tank (10); a discharge valve (12) that discharges the flush water stored in the flush water tank; a branching portion (33) that splits flush water supplied from a water supply source into first and second branched flow paths; a first on-off valve (19) provided in the first branched flow path and switches between spout and stop of the flush water from the upper spout port; a second on-off valve (17) provided in the second branched flow path and switches between supply and stop of the flush water into the flush water tank; and a controller (28) that controls the first and second on-off valve so that water is spouted from the upper spout port and is supplied into the flush water tank at a time by opening the first and second on-off valves.
    Type: Application
    Filed: August 26, 2022
    Publication date: March 2, 2023
    Applicant: TOTO LTD.
    Inventors: Hiroshi HASHIMOTO, Kenichi NAKAMURA, Takumi TSUCHITANI, Shinichi URATA, Chisato SONE, Koichiro MATSUMURA
  • Publication number: 20230065471
    Abstract: The present invention provides a flush water tank device (4), including: a flush water tank (10); a discharge valve (12) that causes the lower spout port to eject the flush water by switching between discharge and stopping of the flush water; a water pressure driving mechanism (14) that drives the discharge valve with a water supply pressure; a first on-off valve (19) that switches between water ejection and stopping of the flush water; a second on-off valve (18) that switches between water supply and stopping of the flush water to the water pressure driving mechanism; and a delay valve opening mechanism (21) that causes the second on-off valve to open with a delay of predetermined time after water ejection from the upper spout port is started, using a part of the flush water introduced via the first on-off valve, to supply the flush water to the water pressure driving mechanism.
    Type: Application
    Filed: August 26, 2022
    Publication date: March 2, 2023
    Applicant: TOTO LTD.
    Inventors: Hideki TANIMOTO, Koki SHINOHARA, Kenji HATAMA, Seika TATSUOKA
  • Publication number: 20230069634
    Abstract: The present invention provides a flush water tank device (4) that supplies flush water to an upper and lower spout port of a flush toilet (2) including; a flush water tank (10); a discharge valve (12); a first on-off valve (19) that performs switching between ejection and stopping of the flush water from the upper spout port; a first on-off valve driving mechanism (16) that is moved from a stopped position to an ejection position based on an user operation; a biasing mechanism (17) that causes the first on-off valve driving mechanism to move to the stopped position; a holding mechanism (20) that holds, at the ejection position, the first on-off valve driving mechanism at the ejection position against the bias force; and a releasing mechanism (21) that releases the holding of the first on-off valve driving mechanism, using the flush water flowing out from the first on-off valve.
    Type: Application
    Filed: August 26, 2022
    Publication date: March 2, 2023
    Applicant: TOTO LTD.
    Inventors: Hideki TANIMOTO, Koki SHINOHARA, Kenji HATAMA, Makoto ABE, Seika TATSUOKA
  • Patent number: 11591785
    Abstract: A flush toilet includes a rear storage configured to store a control unit of a toilet main body. The rear storage includes a supporting wall configured to support the control unit so as to divide a storage region of the rear storage into upper and lower regions. In a rear supporting region of the rear storage, a first distance in a horizontal left-right direction from an outer joining portion to an inner joining portion in the supporting wall is shorter than a second distance in the horizontal left-right direction from an outer wall in the double wall of the skirt to an inner joining portion of the supporting wall. The second distance is set to a maximum width dimension in the left-right direction in an internal space of the double wall of the skirt.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: February 28, 2023
    Assignee: Toto Ltd.
    Inventors: Takahiro Maruyama, Wataru Ishimi
  • Patent number: 11591781
    Abstract: A flush toilet includes a toilet main body made of ceramics and a control unit. The toilet main body includes a skirt, and a rear storage that can store at least a part of the control unit, the rear storage includes a supporting wall that divides a storage region into upper and lower regions and that supports the control unit, the skirt forms a double wall including an outer wall and an inner wall, the double wall has at least a part that forms an internal space between the outer wall and the inner wall, and the skirt includes a single wall in which the internal space of the double wall is removed in an upper end above a joining portion between the double wall and the supporting wall.
    Type: Grant
    Filed: February 24, 2022
    Date of Patent: February 28, 2023
    Assignee: Toto Ltd.
    Inventors: Takahiro Maruyama, Wataru Ishimi, Seiya Nakashima
  • Patent number: 11591784
    Abstract: A sanitary washing device includes a nozzle, a valve unit, a controller, and a casing. The nozzle is configured to discharge water toward an ano-genital region of a human body. The valve unit is provided on a pipe line between a water supply source and the nozzle. The valve unit includes an electromagnetic valve. The controller is configured to control operation of the nozzle and the valve unit. The casing stores the nozzle, the valve unit, and the controller. The valve unit is disposed further frontward than the controller.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: February 28, 2023
    Assignee: TOTO LTD.
    Inventors: Saki Yamamura, Takeshi Yamakawa, Masayuki Mochita
  • Patent number: 11572682
    Abstract: A flush toilet apparatus includes a toilet body that includes a rim water spout port, a tank that stores washing water, a rim side water supply channel that supplies washing water to the rim water spout port, a tank side water supply channel that supplies washing water to the tank, a flow channel switching part that adjusts an amount of washing water that is supplied to one or both of the rim side water supply channel and the tank side water supply channel, and an electrical power failure detection part that detects electrical power failure, wherein, in a case where electrical power failure is caused when washing water is supplied to the tank side water supply channel, the flow channel switching part decreases washing water that is supplied to the tank side water supply channel and increases washing water that is supplied to the rim side water supply channel.
    Type: Grant
    Filed: February 11, 2022
    Date of Patent: February 7, 2023
    Assignee: TOTO LTD.
    Inventors: Hideaki Kashimura, Hiroki Tanaka, Kenji Watanabe, Satoshi Takano, Yoshikatsu Adachi, Koichi Motooka, Yuki Hayashi
  • Patent number: 11572681
    Abstract: A flush toilet includes a toilet main body made of ceramics and a rear storage configured to store at least a part of a control unit. The rear storage includes a supporting wall that divides a storage region into upper and lower regions and that joins left and right side walls of the skirt and the water discharge trap. The supporting wall includes a horizontal wall that extends in a horizontal direction from a joining portion between the supporting wall and the water discharge trap, and left and right lower walls that are provided outside the horizontal wall in a left-right direction and below the horizontal wall and that are joined to the left and right side walls of the skirt. The left and right lower walls on a rear side are separated in the left-right direction by the horizontal wall.
    Type: Grant
    Filed: February 24, 2022
    Date of Patent: February 7, 2023
    Assignee: TOTO LTD.
    Inventors: Takahiro Maruyama, Wataru Ishimi
  • Patent number: 11566410
    Abstract: A flush toilet includes a toilet main body made of ceramics including a skirt and a rear storage configured to store at least a part of a control unit. The skirt includes a rear wall and a side wall provided in a back surface and a side surface of the toilet main body, respectively. The rear wall includes an opening provided between a peripheral edge of each opening and the side wall of the skirt. The opening penetrates in a front-rear direction to communicate between an inner region of the rear storage or an outer region below the inner region and an outer region behind the toilet main body. The skirt further includes a cross beam that joinably or coupleably supports the peripheral edge of the opening and the side wall of the skirt to each other so as to reinforce strength of the toilet main body.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: January 31, 2023
    Assignee: Toto Ltd.
    Inventors: Yusuke Eto, Takahiro Maruyama, Wataru Ishimi
  • Patent number: D984608
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: April 25, 2023
    Assignee: TOTO Ltd.
    Inventors: Hirotaka Nakabayashi, Minoru Tani, Tomohiro Miyazaki