Patents by Inventor Tatsuya Karaki

Tatsuya Karaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220196284
    Abstract: A combustion device including a chamber, a burner, a fan case, and a fan is provided. The chamber has a top wall. On the top wall, an inflow port penetrating through the top wall along a first direction and in communication with an internal space of the chamber is formed. The burner is attached to the chamber, so as to be spaced apart from and face the top wall in the first direction. In the fan case, a discharge port and an intake port penetrating through the fan case along the first direction and in communication with an internal space of the fan case are formed. The discharge port is connected with the inflow port. The fan is provided in the internal space of the fan case. A rotation axis of the fan is along the first direction.
    Type: Application
    Filed: December 2, 2021
    Publication date: June 23, 2022
    Applicant: NORITZ CORPORATION
    Inventor: Tatsuya KARAKI
  • Publication number: 20220034503
    Abstract: A premixing flow path forming member of a premixing device includes a member whose attachment mode can be changed, and flow path resistance of a fuel gas flow path can be changed when the attachment mode of the member is changed.
    Type: Application
    Filed: July 14, 2021
    Publication date: February 3, 2022
    Applicant: NORITZ CORPORATION
    Inventors: Kyohei OGAWA, Keiichi MIURA, Tsuneo FUNABIKI, Tatsuya KARAKI
  • Publication number: 20210394134
    Abstract: A premixing device includes: a gas flow passage forming member in which an x direction is used as an axial length direction, and a Venturi-shaped gas flow passage into which air can flow in from the outside is formed inside; and a blade portion positioned in the gas flow passage, extending in a y direction, and equipped with a fuel gas outlet. The blade portion includes first and second blade portions spaced apart from each other in a z direction, and an air flow path near the center through which a part of the air flows is formed between these first and second blade portions. At least one of a pair of surfaces of the first and second blade portions facing each other is equipped with an inner bulging portion that bulges in the z direction so as to squeeze a part of the air flow path near the center.
    Type: Application
    Filed: June 16, 2021
    Publication date: December 23, 2021
    Applicant: NORITZ CORPORATION
    Inventors: Keiichi MIURA, Tsuneo FUNABIKI, Tatsuya KARAKI, Kyohei OGAWA
  • Publication number: 20200096197
    Abstract: A combustion apparatus includes a burner configured to produce flames, a first flame rod and a second flame rod, and a controller. The burner is configured to be controlled, by the controller, to be in a first output state, and a second output state in which output is smaller than in the first output state. The first flame rod makes contact with the flames produced at the burner in a normal combustion state. The second flame rod makes contact with the flames produced at the burner in the normal combustion state when the burner is being controlled to be in the first output state, and does not make contact with the flames produced at the burner in the normal combustion state when the burner is being controlled to be in the second output state.
    Type: Application
    Filed: September 17, 2019
    Publication date: March 26, 2020
    Applicant: NORITZ CORPORATION
    Inventor: Tatsuya KARAKI
  • Publication number: 20200033002
    Abstract: A combustion apparatus includes a burner, a chamber, and a flame rod. The burner includes a burner port surface in which a plurality of burner ports are open. The chamber includes an attachment surface to which the burner is attached and supplies mixed gas to the plurality of burner ports. The flame rod is attached to a flange portion of a chamber located on an outer circumference side of the burner in plan view. The flame rod includes a core. The core extends diagonally to the attachment surface to pass through the chamber, and is bent toward the burner port surface.
    Type: Application
    Filed: July 18, 2019
    Publication date: January 30, 2020
    Applicant: NORITZ CORPORATION
    Inventor: Tatsuya KARAKI
  • Patent number: 10533742
    Abstract: A burner case and a burner device provided with the burner case are disclosed. A cover for closing an opening of a case body of the burner case is attached to the case body by a first caulking portion and a second caulking portion. A first caulking direction and a second caulking direction intersect with each other, the first caulking direction is a direction in which a first attachment piece and a first facing portion, those constituting the first caulking portion, face each other and are caulked, the second caulking direction is a direction in which a second attachment piece and a second facing portion, those constituting the second caulking portion, face each other and are caulked. Thus, the case body and the cover are not required to be screwed or the number of the screws is reduced, and leakage of gas from the burner case to outside is prevented.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: January 14, 2020
    Assignee: NORITZ CORPORATION
    Inventors: Takashi Akiyama, Ryosuke Umakoshi, Taihei Terasawa, Kenichi Sakurai, Tatsuya Karaki, Naoki Se
  • Patent number: 10309645
    Abstract: A cover member of a gas supply manifold has a bent rising wall portion that is formed by bending a part of the cover member so as to rise in an opposite direction of a main body. The bent rising wall portion is in a form of a loop surrounding the entire circumference of a gas supply flow path and an area around the gas supply flow path. Such configuration increases the rigidity of the cover member and prevents large distortion of the cover member and leakage of gas from the gas supply flow path. As a result, the thickness of the cover member is reduced and the weight and the production cost of the gas supply manifold are also reduced.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: June 4, 2019
    Assignee: NORITZ CORPORATION
    Inventors: Yuta Tsuji, Naoki Se, Hideyuki Fujisawa, Katsuya Imaoka, Keizo Kawano, Tatsuya Karaki, Ryosuke Umakoshi
  • Patent number: 10072842
    Abstract: A water heater capable of cooling a fan by inflow of air while suppressing backflow of combustion gas is provided. A fan includes: a fan case having a back surface wall; an impeller having a first blade and a second blade and housed in the fan case; a drive source rotating the impeller; and a rotation shaft coupling the impeller and the drive source through a through hole provided in the back surface wall. A gap through which air outside the fan case is suctioned into the fan case is provided between the rotation shaft and the back surface wall. The second blade faces the back surface wall without another member interposed therebetween throughout a range from an inner circumferential side to an outer circumferential side of the second plane.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: September 11, 2018
    Assignee: NORITZ CORPORATION
    Inventors: Shuji Kameyama, Yasutaka Kuriyama, Norihide Wada, Keigo Fukunishi, Tatsuya Karaki
  • Patent number: 9869489
    Abstract: A fan assembly includes a fan and an emission connection portion. The fan includes a fan case having a first internal space, an impeller, and a rotation shaft. The emission connection portion includes a connection portion case having a second internal space and provided with an emission port for emitting gas sent from the fan to the outside of the fan assembly through the second internal space. In a plan view from a direction of axis of the rotation shaft, a tongue portion extending from one end toward the other end is located at a boundary between the first internal space and the second internal space, and the tongue portion is provided to extend to a position at least reaching a straight line connecting a center point of the emission port and a center of rotation of the rotation shaft to each other, from one end toward the other end.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: January 16, 2018
    Assignee: NORITZ CORPORATION
    Inventors: Keigo Fukunishi, Shuji Kameyama, Tatsuya Karaki
  • Publication number: 20170370574
    Abstract: A cover member of a gas supply manifold has a bent rising wall portion that is formed by bending a part of the cover member so as to rise in an opposite direction of a main body. The bent rising wall portion is in a form of a loop surrounding the entire circumference of a gas supply flow path and an area around the gas supply flow path. Such configuration increases the rigidity of the cover member and prevents large distortion of the cover member and leakage of gas from the gas supply flow path. As a result, the thickness of the cover member is reduced and the weight and the production cost of the gas supply manifold are also reduced.
    Type: Application
    Filed: June 15, 2017
    Publication date: December 28, 2017
    Applicant: NORITZ CORPORATION
    Inventors: Yuta TSUJI, Naoki SE, Hideyuki FUJISAWA, Katsuya IMAOKA, Keizo KAWANO, Tatsuya KARAKI, Ryosuke UMAKOSHI
  • Publication number: 20170205067
    Abstract: A burner case and a burner device provided with the burner case are disclosed. A cover for closing an opening of a case body of the burner case is attached to the case body by a first caulking portion and a second caulking portion. A first caulking direction and a second caulking direction intersect with each other, the first caulking direction is a direction in which a first attachment piece and a first facing portion, those constituting the first caulking portion, face each other and are caulked, the second caulking direction is a direction in which a second attachment piece and a second facing portion, those constituting the second caulking portion, face each other and are caulked. Thus, the case body and the cover are not required to be screwed or the number of the screws is reduced, and leakage of gas from the burner case to outside is prevented.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 20, 2017
    Applicant: NORITZ CORPORATION
    Inventors: Takashi AKIYAMA, Ryosuke UMAKOSHI, Taihei TERASAWA, Kenichi SAKURAI, Tatsuya KARAKI, Naoki SE
  • Patent number: 9513030
    Abstract: A water heater of a latent heat recovery type includes: a combustion apparatus including a burner having a plurality of burner port portions and generating combustion gas from openings at ends of the plurality of burner port portions; a heat exchanger heating water that flows through inside by heat exchange with combustion gas generated in the combustion apparatus; and a fan suctioning the combustion gas that has passed through the heat exchanger and emitting combustion gas to outside of the water heater. The fan includes a fan case, an impeller housed within the fan case, and a drive source connected to the impeller. At least a part of an upper surface of a bottom wall of the fan case is inclined with respect to a reference plane including the openings of the plurality of burner port portions.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: December 6, 2016
    Assignee: NORITZ CORPORATION
    Inventors: Tatsuya Karaki, Yasutaka Kuriyama, Norihide Wada, Shuji Kameyama, Keigo Fukunishi
  • Publication number: 20160069587
    Abstract: A fan assembly includes a fan and an emission connection portion. The fan includes a fan case having a first internal space, an impeller, and a rotation shaft. The emission connection portion includes a connection portion case having a second internal space and provided with an emission port for emitting gas sent from the fan to the outside of the fan assembly through the second internal space. In a plan view from a direction of axis of the rotation shaft, a tongue portion extending from one end toward the other end is located at a boundary between the first internal space and the second internal space, and the tongue portion is provided to extend to a position at least reaching a straight line connecting a center point of the emission port and a center of rotation of the rotation shaft to each other, from one end toward the other end.
    Type: Application
    Filed: August 19, 2015
    Publication date: March 10, 2016
    Applicant: NORITZ CORPORATION
    Inventors: Keigo FUKUNISHI, Shuji KAMEYAMA, Tatsuya KARAKI
  • Publication number: 20150241086
    Abstract: A water heater capable of cooling a fan by inflow of air while suppressing backflow of combustion gas is provided. A fan includes: a fan case having a back surface wall; an impeller having a first blade and a second blade and housed in the fan case; a drive source rotating the impeller; and a rotation shaft coupling the impeller and the drive source through a through hole provided in the back surface wall. A gap through which air outside the fan case is suctioned into the fan case is provided between the rotation shaft and the back surface wall. The second blade faces the back surface wall without another member interposed therebeween throughout a range from an inner circumferential side to an outer circumferential side of the second plane.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 27, 2015
    Applicant: NORITZ CORPORATION
    Inventors: Shuji KAMEYAMA, Yasutaka KURIYAMA, Norihide WADA, Keigo FUKUNISHI, Tatsuya KARAKI
  • Publication number: 20150176861
    Abstract: A water heater of a latent heat recovery type includes: a combustion apparatus including a burner having a plurality of burner port portions and generating combustion gas from openings at ends of the plurality of burner port portions; a heat exchanger heating water that flows through inside by heat exchange with combustion gas generated in the combustion apparatus; and a fan suctioning the combustion gas that has passed through the heat exchanger and emitting combustion gas to outside of the water heater. The fan includes a fan case, an impeller housed within the fan case, and a drive source connected to the impeller. At least a part of an upper surface of a bottom wall of the fan case is inclined with respect to a reference plane including the openings of the plurality of burner port portions.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 25, 2015
    Applicant: NORITZ CORPORATION
    Inventors: Tatsuya KARAKI, Yasutaka KURIYAMA, Norihide WADA, Shuji KAMEYAMA, Keigo FUKUNISHI
  • Patent number: 9039093
    Abstract: Embodiments of the present invention include a vehicle seat having a frame member and a reinforcing member for reinforcing the frame member. The frame member has an elongated portion. The elongated portion is formed of resin and preferably has a flat-plate-like or bar-like configuration. The elongated portion includes a first portion, a front second portion and a rear second portion. The first portion may be arranged in a longitudinal manner with respect to the vehicle seat and extends vertically. The front second portion extends in the lateral direction of the vehicle seat from a front end of the first portion. The rear second portion extends in the lateral direction of the vehicle seat from a rear end of the first portion. The elongated portion is configured so that a neutral axis is positioned between the front and rear second portions.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: May 26, 2015
    Assignee: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Takeshi Nishiura, Tatsuya Karaki
  • Publication number: 20130257131
    Abstract: Embodiments of the present invention include a vehicle seat having a frame member and a reinforcing member for reinforcing the frame member. The frame member has an elongated portion. The elongated portion is formed of resin and preferably has a flat-plate-like or bar-like configuration. The elongated portion includes a first portion, a front second portion and a rear second portion. The first portion may be arranged in a longitudinal manner with respect to the vehicle seat and extends vertically. The front second portion extends in the lateral direction of the vehicle seat from a front end of the first portion. The rear second portion extends in the lateral direction of the vehicle seat from a rear end of the first portion. The elongated portion is configured so that a neutral axis is positioned between the front and rear second portions.
    Type: Application
    Filed: March 4, 2013
    Publication date: October 3, 2013
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Takeshi NISHIURA, Tatsuya KARAKI
  • Patent number: 7950712
    Abstract: A deck board includes a board body arranged in a luggage area of a vehicle so as to be capable of being moved between an upper position and a lower position. The board body in the upper position separates the luggage area into upper and lower areas. The deck board further includes a front support portion that is rotatably connected to the front end portion of the board body via a hinge portion so as to guide the board body being moved between the upper and lower positions. The end portion of the front support portion on the opposite side of the hinge portion is pivotally supported by the sidewalls of the luggage area via a support pin. Further included is a spring unit arranged to bias the board body and the front support portion to be drawn to each other across the hinge portion.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: May 31, 2011
    Assignee: Toyota Boshoku Kabushiki Kaisha
    Inventors: Tatsuya Karaki, Mikihiro Kito
  • Patent number: 7938471
    Abstract: A deck board includes a board body arranged in a luggage area of a vehicle so as to be capable of being moved between an upper position and a lower position. The board body in the upper position separates the luggage area into upper and lower areas. The deck board further includes a front support portion that is rotatably connected to the front side of the board body so as to support the front side of the board body. Further included is a support pin that pivotally supports the fore end portion of the front support portion on the opposite side of the board body, so that a hinge portion can rotate. The deck board further includes a tension spring arranged to bias the front side of the board body toward the support pin.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: May 10, 2011
    Assignee: Toyota Boshoku Kabushiki Kaisha
    Inventors: Tatsuya Karaki, Hiroyuki Suzuki, Mikihiro Kito
  • Publication number: 20090295184
    Abstract: A deck board includes a board body arranged in a luggage area of a vehicle so as to be capable of being moved between an upper position and a lower position. The board body in the upper position separates the luggage area into upper and lower areas. The deck board further includes a front support portion that is rotatably connected to the front end portion of the board body via a hinge portion so as to guide the board body being moved between the upper and lower positions. The end portion of the front support portion on the opposite side of the hinge portion is pivotally supported by the sidewalls of the luggage area via a support pin. Further included is a spring unit arranged to bias the board body and the front support portion to be drawn to each other across the hinge portion.
    Type: Application
    Filed: January 26, 2009
    Publication date: December 3, 2009
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Tatsuya KARAKI, Mikihiro KITO