Patents by Inventor Keiichi Miura

Keiichi Miura 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: 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
  • Patent number: 11226133
    Abstract: [Problem] To provide a water heating apparatus which has a inverse combustion type burner installed within a case for a heat exchanger so as to cause heat to be transferred from an outer peripheral flange of the burner to the heat exchanger case. [Solution] This water heating apparatus is provided with: a fan for supplying combustion air; a chamber case which is connected to the fan and which has set therein a chamber where an air-fuel mixture is formed; a inverse combustion type burner for combusting the air-fuel mixture supplied from the chamber; a heat exchanger in which combustion gas generated by the burner is introduced into a case where water is heated; and sealing member which is installed between a peripheral flange of the chamber case and a peripheral flange of the case, wherein the burner is set inside the case, and an outer peripheral flange of the burner is anchored to an inner wall surface of the case.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: January 18, 2022
    Assignee: NORITZ CORPORATION
    Inventor: Keiichi Miura
  • 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: 20210131702
    Abstract: A water heating device equipped with a housing, a fan and a chamber arranged in the interior of the housing, and screws. The housing has first and second side plates which oppose one another in a first direction and extend from the ends of a back plate along a second direction intersecting the first direction. An opening part is provided in the housing on the side opposite the back plate in the second direction. The fan has a discharge opening, a first flow passage extending along the first direction, and a first flange. The chamber has an intake opening, a second flow passage extending along the first direction, and a second flange. The first and the second flanges are secured by screws. In a planar view, the center axis of the screws is slanted such that a head portion is closer to the opening part than the tip-end portion.
    Type: Application
    Filed: August 14, 2019
    Publication date: May 6, 2021
    Applicant: NORITZ CORPORATION
    Inventors: Tsuneo Funabiki, Keiichi MIURA
  • Publication number: 20200072497
    Abstract: To provide a water heating apparatus which has a inverse combustion type burner installed within a case for a heat exchanger so as to cause heat to be transferred from an outer peripheral flange of the burner to the heat exchanger case. This water heating apparatus is provided with: a fan for supplying combustion air; a chamber case which is connected to the fan and which has set therein a chamber where an air-fuel mixture is formed; a inverse combustion type burner for combusting the air-fuel mixture supplied from the chamber; a heat exchanger in which combustion gas generated by the burner is introduced into a case where water is heated; and sealing member which is installed between a peripheral flange of the chamber case and a peripheral flange of the case, wherein the burner is set inside the case, and an outer peripheral flange of the burner is anchored to an inner wall surface of the case.
    Type: Application
    Filed: May 9, 2018
    Publication date: March 5, 2020
    Applicant: NORITZ CORPORATION
    Inventor: Keiichi MIURA
  • Publication number: 20200033025
    Abstract: A combustion apparatus includes a chamber having an internal space, a fan having a first emission port which communicates with the internal space of the chamber in a first direction, and an ignition plug having a portion overlapping a region extending from the first emission port in the first direction in plan view.
    Type: Application
    Filed: July 18, 2019
    Publication date: January 30, 2020
    Applicant: NORITZ CORPORATION
    Inventor: Keiichi MIURA
  • Patent number: 6786717
    Abstract: A combustion apparatus (1) is generally composed of a principal part (5), a supplementary part (6) and a burner port assembly (3). Four metal plates (7,8,10,11) constituting the principal and supplementary parts (5,6) are pressed to have in them several protuberances and recesses. These metal plates are laid one on another to form in them some hollow spaces and sealed regions. These hollow spaces communicate with each other to form a thin gas passage (22) together with a thick gas passage (73) in this combustion apparatus (1) in such a manner that its condition of thick and thin fuel combustion is rendered more stable.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: September 7, 2004
    Assignee: Noritz Corporation
    Inventors: Masahiko Shimazu, Yasutaka Kuriyama, Takao Morigaki, Takashi Hasegawa, Hidenori Hata, Masaaki Matsuda, Shingo Kimura, Masahiro Iguchi, Takashi Akiyama, Yasuhiko Sato, Koji Shimomura, Toshikazu Miki, Shuji Kameyama, Keiichi Miura
  • Publication number: 20030148241
    Abstract: A combustion apparatus (1) is generally composed of principal part (5), a supplementary part (6) and a burner port assembly (3). Four metal plates (7,8,10,11) constituting the principal and supplementary parts (5,6) are pressed to have in them several protuberances and recesses. These metal plates are laid one on another to form in them some hollow spaces and sealed regions. These hollow spaces communicate with each other to form a thin gas passage (22) together with a thick gas passage (73) in this combustion apparatus (1) in such a manner that its condition of thick and thin fuel combustion is rendered more stable.
    Type: Application
    Filed: January 21, 2003
    Publication date: August 7, 2003
    Applicant: Noritz Corporation
    Inventors: Masahiko Shimazu, Yasutaka Kuriyama, Takao Morigaki, Takashi Hasegawa, Hidenori Hata, Masaaki Matsuda, Shingo Kimura, Masahiro Iguchi, Takashi Akiyama, Yasuhiko Sato, Koji Shimomura, Toshikazu Miki, Shuji Kameyama, Keiichi Miura
  • Patent number: 5296580
    Abstract: A film for stretch packaging comprising as a substrate a film of a linear low density polyethylene having a melt flow rate (190.degree. C.), as measured by an ASTM-D-1238E method, of 0.3 to 8 g/10 min., a density, as measured by an ASTM-D-1505 method, of 0.900 to 0.918 g/cm.sup.3, a molecular weight distribution (Mw/Mn) of 2 to 6, two or more melting points existing as measured by a differential scanning calorimeter, a maximum melting point Tm.sub.1 of 118.degree. to 125.degree. C. and a ratio of the height Tm.sub.1 H of the peak of the highest melting point Tm.sub.1 to the height Tm.sub.1 H of the melting point Tm.sub.2 adjacent thereto (i.e., Tm.sub.1 H/Tm.sub.2 H), of 1.3 or less.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: March 22, 1994
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Takashi Matsunaga, Keiichi Miura
  • Patent number: 4512169
    Abstract: A thickness control device and method for maintaining the thickness of the rolled material which is passed between the rollers of a rolling mill, in which the rollers above and below the rolling material are rotated at different speeds V.sub.H and V.sub.L. A variation in rolling material thickness is detected and expressed in terms of a change in rolling load WF. ##EQU1## is also detected. The change in rolling load .DELTA.F and the differential peripheral speed rate X are used to derive the change in differential speed rate .DELTA.X which would cancel out the variation in rolling material thickness. This correcting differential peripheral speed rate .DELTA.X is then utilized to change the velocities V.sub.H and V.sub.L of the upper and lower rollers, respectively, such that the thickness variation is eliminated without changing the speed of the rolled material.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: April 23, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Keiichi Miura
  • Patent number: 4485497
    Abstract: An apparatus, for controlling the re-distribution of a load in a longitudinal direction of a single strip (which is called hereinafter within the plate) on a multistage continuous rolling mill, stores a standard expression of the distribution of the load for maintaining a product's shape constant within the plate. A screw-down correction computer system calculates deviations from this reference equation and controls a rolling force on each of the rolling mills. It thereby maintains the standard expression of the distribution of the load by iteratively correcting a roll opening on each of the rolling mills within the plate. The control of the load distribution among the roll stands is effected after the roll material has entered all of the roll stands.
    Type: Grant
    Filed: July 28, 1981
    Date of Patent: December 4, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Keiichi Miura
  • Patent number: 4335435
    Abstract: In a tandem rolling mill a control computer integrates the entry speed of a work strip having a gauge transition to determine the arrival of the transition at a first roll stand. At that time a screw-down on that stand is updated through a scheduling computer while roll speeds on all the stands remain unchanged. When the gauge transition arrives at each of the succeeding stands as determined by the control computer integrating a roll speed on the preceding stand, the scheduling computer updates a screw-down on the arrival stand and changes roll speeds so as to minimize the sum of the squares of changes in roll speed with the constant mass flow relationship fulfilled.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: June 15, 1982
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Keiichi Miura
  • Patent number: 4003229
    Abstract: There is described a method for compensating tail end of rolling materials for rolling shaped steel sections in an optimum manner. According to this method, in a continuous tension free rolling operation of a shaped steel section comprising a flat section and a flange section through a plural number of roll stands, the operating speed of a first roll stand is reduced by a predetermined amount as compared with a second or succeeding roll stand when the crop at the tail end of the rolling material enters the first rolling unit, thereby to prevent overfeeding.
    Type: Grant
    Filed: March 26, 1975
    Date of Patent: January 18, 1977
    Assignees: Nippon Steel Corporation, Mitsubishi Electric Corporation
    Inventors: Toshio Harada, Shinichi Nakamata, Shiro Araki, Koei Nakashima, Hironori Kawasaki, Kazuo Watanabe, Keiichi Miura