Patents by Inventor Tomokazu Watanabe

Tomokazu Watanabe 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).

  • Patent number: 11960250
    Abstract: A main circuit includes a switching element, and converts electric power input to the main circuit and supplies a result of the conversion to a load. The controller switches a control scheme of the main circuit from a first control scheme to a second control scheme at a first time point when the output value starts to vary and switches the control scheme of the main circuit from the second control scheme to the first control scheme at a second time point when a determination is made that switching of a variation direction of the output value will occur on the basis of a detection value of the detector.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: April 16, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shota Watanabe, Tomokazu Sakashita
  • Patent number: 11193040
    Abstract: A coating agent for a rubber-coated cylinder head gasket contains a lubricant and a urethane resin. The lubricant is unsintered polytetrafluoroethylene resin particles having an average primary particle size of 1 ?m or less. The amount of the unsintered polytetrafluoroethylene resin particles in a solid content is 30 to 80% by volume. The present invention provides a coating agent for a rubber-coated cylinder head gasket that can form a coat that is highly wear-resistant under high contact pressure and high temperature conditions and with which a rubber layer is less likely to stick to the seal face of the cylinder block or the cylinder head after the use under high contact pressure and high temperature conditions, and a cylinder head gasket obtained using the coating agent.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: December 7, 2021
    Assignee: NICHIAS CORPORATION
    Inventors: Tomokazu Watanabe, Nahoko Kitajima, Hideaki Mori, You Nakajima
  • Patent number: 10882969
    Abstract: A method of producing a rubber molded article, involving utilizing a compound different from a compound that has been used as a crosslinking agent. The method of producing a rubber molded article includes a crosslinking step of crosslinking a rubber component by decomposing a compound to be used as a crosslinking agent for the rubber component, the compound including a structure represented by the following formula (I), in a rubber composition containing the rubber component and the compound, the rubber composition including a sulfur content of 2.0 wt % or less: ?-?-? . . . (I) (in the formula (I), ? represents a monovalent organic group, ? represents —N?N—, and ? represents hydrogen or a monovalent organic group).
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: January 5, 2021
    Assignee: NICHIAS CORPORATION
    Inventors: Tomokazu Watanabe, Tetsuo Oohinata, Nahoko Kitajima
  • Patent number: 10752804
    Abstract: A coating agent includes a polyurethane and a hydrocarbon-based synthetic wax.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: August 25, 2020
    Assignee: NICHIAS CORPORATION
    Inventors: Hideharu Aoyagi, Tomokazu Watanabe, Hideaki Mori, Hirotaka Natori, Nahoko Kitajima, Mai Fujiwara, Jun Tachiki, Jun Oikawa
  • Patent number: 10640677
    Abstract: A coating agent contains a particulate fluorocarbon polymer, an acid-modified polyolefin, a urethane resin, and a curing agent. The present invention provides a coating agent capable of forming a coat with high wear resistance under high contact pressure and high temperature conditions, a surface-coated elastic body obtained using the same, and a surface-coated rubber metal laminate.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: May 5, 2020
    Assignee: NICHIAS CORPORATION
    Inventors: Jun Tachiki, Tomokazu Watanabe, Hideharu Aoyagi
  • Patent number: 10563104
    Abstract: A sheet including exfoliated clay minerals, having a density of 1.6 g/cm3 or less and a compression ratio of 20% or more.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: February 18, 2020
    Assignee: NICHIAS CORPORATION
    Inventors: Hirotaka Natori, Tomokazu Watanabe, Nahoko Kitajima
  • Patent number: 10544864
    Abstract: A gasket including a sheet part that includes exfoliated clay minerals, wherein the exfoliated clay minerals are irregularly dispersed in the sheet part without being oriented.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: January 28, 2020
    Assignee: NICHIAS CORPORATION
    Inventors: Hirotaka Natori, Tomokazu Watanabe, Nahoko Kitajima
  • Publication number: 20190309186
    Abstract: A coating agent for a rubber-coated cylinder head gasket contains a lubricant and a urethane resin. The lubricant is unsintered polytetrafluoroethylene resin particles having an average primary particle size of 1 ?m or less. The amount of the unsintered polytetrafluoroethylene resin particles in a solid content is 30 to 80% by volume. The present invention provides a coating agent for a rubber-coated cylinder head gasket that can form a coat that is highly wear-resistant under high contact pressure and high temperature conditions and with which a rubber layer is less likely to stick to the seal face of the cylinder block or the cylinder head after the use under high contact pressure and high temperature conditions, and a cylinder head gasket obtained using the coating agent.
    Type: Application
    Filed: December 1, 2017
    Publication date: October 10, 2019
    Applicant: NICHIAS CORPORATION
    Inventors: Tomokazu Watanabe, Nahoko Kitajima, Hideaki Mori, You Nakajima
  • Publication number: 20180371288
    Abstract: A coating agent contains a particulate fluorocarbon polymer, an acid-modified polyolefin, a urethane resin, and a curing agent. The present invention provides a coating agent capable of forming a coat with high wear resistance under high contact pressure and high temperature conditions, a surface-coated elastic body obtained using the same, and a surface-coated rubber metal laminate.
    Type: Application
    Filed: January 6, 2017
    Publication date: December 27, 2018
    Applicant: NICHIAS CORPORATION
    Inventors: Jun Tachiki, Tomokazu Watanabe, Hideharu Aoyagi
  • Patent number: 9909046
    Abstract: A heat storage member includes a honeycomb structure having a plurality of cells, each of which is filled with capsules and a heat conductive filler. Each capsule contains a heat storage material. The heat storage member is prepared by bringing a starting material that is a mixture of the capsules into contact with the honeycomb structure to cover at least one surface of the opening of the cells of the honeycomb structure, subjecting the same to uniaxial pressure molding under the pressure of 4 MPa to 10 MPa, and filling each cell with the starting material.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: March 6, 2018
    Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., NICHIAS CORPORATION
    Inventors: Aiichiro Tsukahara, Isami Abe, Tetsuya Mihara, Shu Morikawa, Tomokazu Watanabe
  • Patent number: 9905541
    Abstract: A semiconductor module includes upper arms and lower arms for three phases, heat sinks, a main circuit side bus bar, an output terminal side bus bar, a control terminal, and a resin mold portion. The output terminal side bus bar includes U-phase to W-phase wiring layers disposed opposite to each other via an insulating layer and U to W terminals electrically connecting each of the U-phase to W-phase wiring layer and a load. A stacked layer number of the U-phase to W-phase wiring layer is set to be an even number.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: February 27, 2018
    Assignee: DENSO CORPORATION
    Inventors: Hiroshi Ishino, Tomokazu Watanabe
  • Publication number: 20180023706
    Abstract: A gasket including a sheet part that includes exfoliated clay minerals, wherein the exfoliated clay minerals are irregularly dispersed in the sheet part without being oriented.
    Type: Application
    Filed: February 2, 2016
    Publication date: January 25, 2018
    Applicant: Nichias Corporation
    Inventors: Hirotaka NATORI, Tomokazu WATANABE, Nahoko KITAJIMA
  • Publication number: 20170152397
    Abstract: A coating agent includes a polyurethane and a hydrocarbon-based synthetic wax.
    Type: Application
    Filed: June 8, 2015
    Publication date: June 1, 2017
    Applicant: NICHIAS CORPORATION
    Inventors: Hideharu AOYAGI, Tomokazu WATANABE, Hideaki MORI, Hirotaka NATORI, Nahoko KITAJIMA, Mai FUJIWARA, Jun TACHIKI, Jun OIKAWA
  • Publication number: 20170148770
    Abstract: A semiconductor module includes upper arms and lower arms for three phases, heat sinks, a main circuit side bus bar, an output terminal side bus bar, a control terminal, and a resin mold portion. The output terminal side bus bar includes U-phase to W-phase wiring layers disposed opposite to each other via an insulating layer and U to W terminals electrically connecting each of the U-phase to W-phase wiring layer and a load. A stacked layer number of the U-phase to W-phase wiring layer is set to be an even number.
    Type: Application
    Filed: March 26, 2015
    Publication date: May 25, 2017
    Inventors: Hiroshi ISHINO, Tomokazu WATANABE
  • Patent number: 9520345
    Abstract: A semiconductor module is configured such that heat radiation substrates are connected to lead frames and semiconductor chips are directly connected to the lead frames, so that the semiconductor chips are not connected to the lead frames through conductive portions of the heat radiation substrates. Therefore, the conductive portions can have a solid shape without being divided. As such, an occurrence of curving of the heat radiation substrates is suppressed when a temperature is reduced from a high temperature to a room temperature after resin-sealing at the high temperature or the like. Therefore, connection between the semiconductor chip and the lead frames and connection between the lead frames and the heat radiation substrates enhance.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: December 13, 2016
    Assignee: DENSO CORPORATION
    Inventors: Hiroshi Ishino, Tomokazu Watanabe
  • Publication number: 20160194536
    Abstract: A sheet including exfoliated clay minerals, having a density of 1.6 g/cm3 or less and a compression ratio of 20% or more.
    Type: Application
    Filed: July 16, 2014
    Publication date: July 7, 2016
    Inventors: Hirotaka Natori, Tomokazu Watanabe, Nahoko Kitajima
  • Patent number: 9351423
    Abstract: In a semiconductor device, heat radiation plates are respectively disposed on a front surface side and a rear surface side of semiconductor chips in an upper arm and a lower arm. A lead-out conductor part includes a parallel conductor that includes a positive electrode terminal, a negative electrode terminal, and an insulating film disposed between the positive electrode terminal and the negative electrode terminal, and the positive electrode terminal and the negative electrode terminal are disposed oppositely while sandwiching the insulation film. The semiconductor chips are covered by a resin mold part, surfaces of the heat radiation plates opposite to the semiconductor chips, a part of the positive electrode terminal, and a part of the negative electrode terminal are exposed from the resin mold part, and at least a part of the parallel conductor in the lead-out conductor part enters the resin mold part.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: May 24, 2016
    Assignee: DENSO CORPORATION
    Inventors: Hiroshi Ishino, Tomokazu Watanabe
  • Publication number: 20160126167
    Abstract: A semiconductor module is configured such that heat radiation substrates are connected to lead frames and semiconductor chips are directly connected to the lead frames, so that the semiconductor chips are not connected to the lead frames through conductive portions of the heat radiation substrates. Therefore, the conductive portions can have a solid shape without being divided. As such, an occurrence of curving of the heat radiation substrates is suppressed when a temperature is reduced from a high temperature to a room temperature after resin-sealing at the high temperature or the like. Therefore, connection between the semiconductor chip and the lead frames and connection between the lead frames and the heat radiation substrates enhance.
    Type: Application
    Filed: December 2, 2015
    Publication date: May 5, 2016
    Inventors: Hiroshi ISHINO, Tomokazu WATANABE
  • Patent number: 9240371
    Abstract: A semiconductor module is configured such that heat radiation substrates are connected to lead frames and semiconductor chips are directly connected to the lead frames, so that the semiconductor chips are not connected to the lead frames through conductive portions of the heat radiation substrates. Therefore, the conductive portion can have a solid shape without being divided. As such, an occurrence of curving of the heat radiation substrates is suppressed when a temperature is reduced from a high temperature to a room temperature after resin-sealing at the high temperature or the like. Therefore, connection between the semiconductor chip and the lead frames and connection between the lead frames and the heat radiation substrates enhance.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: January 19, 2016
    Assignee: DENSO CORPORATION
    Inventors: Hiroshi Ishino, Tomokazu Watanabe
  • Publication number: 20150148495
    Abstract: Provided is a method of producing a rubber molded article, including crosslinking a rubber compound at a temperature lower than a usual crosslinking temperature (150° C. or more). The method includes a crosslinking step of crosslinking a rubber compound at a temperature of 100° C. or less, the rubber compound having a nitrile structure represented by the following formula (I) and an olefin structure represented by the following formula (II), in a rubber composition containing the rubber compound and a thiol compound having at least two thiol groups in a molecule thereof: provided that R in the formula (II) represents a divalent organic group having 4 or more carbon atoms and having an unsaturated bond represented by —C?C— in a structure thereof.
    Type: Application
    Filed: April 25, 2013
    Publication date: May 28, 2015
    Inventors: Tomokazu Watanabe, Nahoko Kitajima, Tomoya Shimizu