Patents by Inventor Hiromi Yamasaki

Hiromi Yamasaki 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: 10660229
    Abstract: An electrical device is provided. The electrical device includes a case, a first electrical part, a second electrical part, and a connecting portion. The case includes a first case and a second case coupled to the first case. The first electrical part is fixed to the first case. The second electrical part is fixed to the second case. The connecting portion is configured to connect a first conductor extending from the first electrical part and a second conductor extending from the second electrical part each other. Either one of the first case and the second case includes a through hole. The connecting portion is disposed so as to be entirely visible from the through hole as viewed from an outside of the case.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: May 19, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Hiroki Umeda, Kenshi Yamanaka, Shinichi Miura, Hiromi Yamasaki, Hitoshi Imura, Yutaka Morimoto, Kazuki Hayashi, Hideaki Tachibana, Yoshiki Kawaguchi
  • Patent number: 10471842
    Abstract: An on-vehicle structure of a power converter includes a housing of the power converter mounted on a vehicle, a structure mounted on the vehicle, and a high-voltage connector attached to the housing. The high-voltage connector is configured to apply a voltage exceeding a predetermined threshold voltage, the high-voltage connector is positioned between the housing and the structure such that the high-voltage connector faces the structure in a removal direction of the high-voltage connector when the high-voltage connector is attached to the housing, and in a state where the high-voltage connector is attached to the housing, a length of a portion of the high-voltage connector embedded in the housing is determined so as to be longer than a distance between the high-voltage connector and the structure.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: November 12, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke Sawazaki, Kenshi Yamanaka, Hiromi Yamasaki, Hitoshi Imura, Akira Saito
  • Patent number: 10454375
    Abstract: A power converter may include a first and second housings, each of which houses switching elements connected in parallel. Each of the first and the second housings may be provided with a first surface and a second surface. The first and the second housings may be arranged face to face. In each of the first and the second housings, the switching elements may be aligned in an alignment direction which is parallel to both of the first and the second surfaces. An emitter terminal or a source terminal of parallel connection of the switching elements may extend from the second surface at a position equidistant from the switching elements positioned at both ends in the alignment direction among the plurality of switching elements. A collector terminal or a drain terminal of the parallel connection may be positioned adjacent to the emitter or the source terminal in the alignment direction.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: October 22, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki Jojima, Shuichi Iwata, Hiromi Yamasaki, Takanori Kawashima
  • Patent number: 10434884
    Abstract: A vehicle includes a motor housing accommodating motors for driving wheels, and a power control unit fixed on the motor housing. The power control unit includes: a stacked unit in which multiple power modules accommodating power semiconductor elements for electric power conversion and multiple coolers are stacked; and reactors. The stacked unit is disposed in the case of the power control unit such that the stacking direction of the power modules and the coolers is directed toward the vehicle-longitudinal direction. The reactors are disposed in the case so as not to overlap with the stacked unit as viewed from the stacking direction.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: October 8, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Keisuke Sawazaki, Kenshi Yamanaka, Ryusuke Baba, Hiromi Yamasaki, Hitoshi Imura, Hideaki Tachibana
  • Patent number: 10396668
    Abstract: A power converter disclosed herein may include power conversion circuits connected in parallel and a cutoff switch provided in each of the power conversion circuits. The cutoff switch may be configured to cut off connection of corresponding one of the power conversion circuits from other power conversion circuit. In the power converter disclosed herein, the cutoff switches of the power conversion circuits may be housed in a first module.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: August 27, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki Jojima, Shuichi Iwata, Hiromi Yamasaki, Tomoo Yamabuki, Hitoshi Imura
  • Publication number: 20190245443
    Abstract: A power converter may include a first and second housings, each of which houses switching elements connected in parallel. Each of the first and the second housings may be provided with a first surface and a second surface. The first and the second housings may be arranged face to face. In each of the first and the second housings, the switching elements may be aligned in an alignment direction which is parallel to both of the first and the second surfaces. An emitter terminal or a source terminal of parallel connection of the switching elements may extend from the second surface at a position equidistant from the switching elements positioned at both ends in the alignment direction among the plurality of switching elements. A collector terminal or a drain terminal of the parallel connection may be positioned adjacent to the emitter or the source terminal in the alignment direction.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 8, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki JOJIMA, Shuichi Iwata, Hiromi Yamasaki, Takanori Kawashima
  • Publication number: 20190245446
    Abstract: A power converter disclosed herein may include power conversion circuits connected in parallel and a cutoff switch provided in each of the power conversion circuits. The cutoff switch may be configured to cut off connection of corresponding one of the power conversion circuits from other power conversion circuit. In the power converter disclosed herein, the cutoff switches of the power conversion circuits may be housed in a first module.
    Type: Application
    Filed: January 2, 2019
    Publication date: August 8, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki JOJIMA, Shuichi IWATA, Hiromi YAMASAKI, Tomoo YAMABUKI, Hitoshi IMURA
  • Patent number: 10374523
    Abstract: A power conversion device includes a case including an upper case and a lower case; an inverter that is accommodated in a first partial case and is fixed to the first partial case, the first partial case being one of the upper case and the lower case; and a capacitor that is connected to the inverter by a positive electrode bus bar and a negative electrode bus bar, the capacitor being disposed in an internal space of a second partial case that is another of the upper case and the lower case. The first partial case includes a fastening portion that extends from an internal space of the first partial case to the internal space of the second partial case. In the internal space of the second partial case, the capacitor is fastened to the fastening portion.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: August 6, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Shinichi Miura, Hiroki Umeda, Kenshi Yamanaka, Yutaka Morimoto, Kazuki Hayashi, Hiromi Yamasaki, Hitoshi Imura, Tomohisa Sano, Daisuke Harada, Hideaki Tachibana
  • Publication number: 20190174647
    Abstract: An electrical device is provided. The electrical device includes a case, a first electrical part, a second electrical part, and a connecting portion. The case includes a first case and a second case coupled to the first case. The first electrical part is fixed to the first case. The second electrical part is fixed to the second case. The connecting portion is configured to connect a first conductor extending from the first electrical part and a second conductor extending from the second electrical part each other. Either one of the first case and the second case includes a through hole. The connecting portion is disposed so as to be entirely visible from the through hole as viewed from an outside of the case.
    Type: Application
    Filed: November 29, 2018
    Publication date: June 6, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Hiroki UMEDA, Kenshi YAMANAKA, Shinichi MIURA, Hiromi YAMASAKI, Hitoshi IMURA, Yutaka MORIMOTO, Kazuki HAYASHI, Hideaki TACHIBANA, Yoshiki KAWAGUCHI
  • Publication number: 20190173394
    Abstract: A power conversion device includes a case including an upper case and a lower case; an inverter that is accommodated in a first partial case and is fixed to the first partial case, the first partial case being one of the upper case and the lower case; and a capacitor that is connected to the inverter by a positive electrode bus bar and a negative electrode bus bar, the capacitor being disposed in an internal space of a second partial case that is another of the upper case and the lower case. The first partial case includes a fastening portion that extends from an internal space of the first partial case to the internal space of the second partial case. In the internal space of the second partial case, the capacitor is fastened to the fastening portion.
    Type: Application
    Filed: December 4, 2018
    Publication date: June 6, 2019
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Shinichi MIURA, Hiroki UMEDA, Kenshi YAMANAKA, Yutaka MORIMOTO, Kazuki HAYASHI, Hiromi YAMASAKI, Hitoshi IMURA, Tomohisa SANO, Daisuke HARADA, Hideaki TACHIBANA
  • Publication number: 20190152331
    Abstract: An on-vehicle structure of a power converter includes a housing of the power converter mounted on a vehicle, a structure mounted on the vehicle, and a high-voltage connector attached to the housing. The high-voltage connector is configured to apply a voltage exceeding a predetermined threshold voltage, the high-voltage connector is positioned between the housing and the structure such that the high-voltage connector faces the structure in a removal direction of the high-voltage connector when the high-voltage connector is attached to the housing, and in a state where the high-voltage connector is attached to the housing, a length of a portion of the high-voltage connector embedded in the housing is determined so as to be longer than a distance between the high-voltage connector and the structure.
    Type: Application
    Filed: September 24, 2018
    Publication date: May 23, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke SAWAZAKI, Kenshi YAMANAKA, Hiromi YAMASAKI, Hitoshi IMURA, Akira SAITO
  • Publication number: 20190150328
    Abstract: A power control device includes a cooling medium flow channel provided on a lower portion of a casing of the power control device; a cover attached to a lower surface of the casing with a gasket interposed between the cover and the lower surface, the gasket surrounding the cooling medium flow channel, the cover closing the cooling medium flow channel; and a groove or a protrusion provided on the lower surface at a position between the gasket and an outer edge of the lower surface.
    Type: Application
    Filed: October 1, 2018
    Publication date: May 16, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi MIURA, Yutaka MORIMOTO, Hiromi YAMASAKI, Hitoshi IMURA
  • Patent number: 10205316
    Abstract: A mounting structure for a power converter in a vehicle is provided. The power converter includes a plurality of voltage converter circuits connected in parallel, and each of the plurality of voltage converter circuits includes a reactor, in which the power converter includes: a main body containing at least one of the reactors and a switching device of the voltage converter circuits; and a sub-body containing remaining reactors, the sub-body being electrically connected to the main body by a cable. The main body is fixed to a vehicle body via a bracket in a front compartment such that a gap is provided below the main body, and the sub-body is connected to a lateral side of the main body in a vehicle width direction such that a front end of the sub-body aligns with a front end of the main body.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: February 12, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuki Jojima, Shuichi Iwata, Hiromi Yamasaki, Tomoo Yamabuki, Hitoshi Imura
  • Publication number: 20180281605
    Abstract: A vehicle includes a motor housing accommodating motors for driving wheels, and a power control unit fixed on the motor housing. The power control unit includes: a stacked unit in which multiple power modules accommodating power semiconductor elements for electric power conversion and multiple coolers are stacked; and reactors. The stacked unit is disposed in the case of the power control unit such that the stacking direction of the power modules and the coolers is directed toward the vehicle-longitudinal direction. The reactors are disposed in the case so as not to overlap with the stacked unit as viewed from the stacking direction.
    Type: Application
    Filed: March 29, 2018
    Publication date: October 4, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Keisuke SAWAZAKI, Kenshi YAMANAKA, Ryusuke BABA, Hiromi YAMASAKI, Hitoshi IMURA, Hideaki TACHIBANA
  • Publication number: 20150229206
    Abstract: An electrical power converter is configured to perform an electrical power conversion with two electricity storage apparatuses, the electrical power converter has: four switching elements which are electrically connected in series and which are housed in the electrical power converter such that the four switching elements are located at four corners of a planar quadrangular region respectively; a first conductive path which electrically connects a first and second switching elements among the four switching elements; and a second conductive path which electrically connects a third and fourth switching elements among the four switching elements, wherein the second conductive path intersects with the first conductive path in a planar view.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 13, 2015
    Inventors: Masaya KAJI, Hitoshi IMURA, Hiromi YAMASAKI, Masanori ISHIGAKI, Naoki YANAGIZAWA, Shuji TOMURA
  • Patent number: 8963324
    Abstract: In a semiconductor device, a semiconductor module is pressed against a cooler by a spring member. The spring member is compressed by a beam member that is connected with a strut fixed to the cooler. The cooler has a pressed part in which the semiconductor module is pressed, and a strut fixing part to which the strut is fixed. The strut fixing part has higher rigidity than the pressed part.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: February 24, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takato Sato, Yukio Onishi, Hiroyuki Kono, Hiroaki Yoshizawa, Toshio Watari, Hiromi Yamasaki
  • Publication number: 20140291833
    Abstract: In a semiconductor device, a semiconductor module is pressed against a cooler by a spring member. The spring member is compressed by a beam member that is connected with a strut fixed to the cooler. The cooler has a pressed part in which the semiconductor module is pressed, and a strut fixing part to which the strut is fixed. The strut fixing part has higher rigidity than the pressed part.
    Type: Application
    Filed: March 26, 2014
    Publication date: October 2, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takato SATO, Yukio ONISHI, Hiroyuki KONO, Hiroaki YOSHIZAWA, Toshio WATARI, Hiromi YAMASAKI
  • Patent number: 6918326
    Abstract: There is provided a vertical lathe which, when machining gradually varying lens grooves in a mold for molding of a Fresnel lens, can change the angle of a cutting tool without positional displacement of the cutting tip, enabling high accuracy machining of the gradually varying lens grooves. The vertical lathe includes: a column; a rotary table for rotating a workpiece; a cantilevered cross rail supported by the column; a saddle movable in a horizontal direction along a guideway of the cross rail; a ram suspended from the saddle and movable vertically along a guideway of the saddle; and an inclined head mounted to the lower end of the ram and having an inclined swivel shaft for holding a cutting tool, wherein said swivel shaft is configured to swivel the cutting tool around a nose of the cutting tool as the center of swiveling.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: July 19, 2005
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Masaaki Mitsuzono, Hiromi Yamasaki
  • Patent number: 6901830
    Abstract: In a vertical lathe of an open side column type, a pair of linear guides (65,66) arranged in parallel in a cross rail (62), and a space portion (67) is formed between them (65,66). A saddle (90) is supported by the linear guides (65, 66) above the space portion (67) and moved in an axis direction (X axis). A ram (120) is suspended through the space portion (67) and moved in a vertical direction (X axis). A rotary driving disc (34) fixed on the table rotation driving shalt (33) is connected to a rotary table (30) by plural torque transmission pins (37) in torque transmission relationship. Thereby, the rotary table (30) rotates in carrier method. A tool holder (151) is rotatably driven at an optional angle position (B axis position) by a B axis servomotor (163) about a horizontal axis. The tool holder (151) is clamped at an optional rotation angle position by a thrust static pressure bearing under oil-pressure supply to one of thrust static pressure portions.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: June 7, 2005
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Kazushi Kawatsu, Hiromi Yamasaki
  • Publication number: 20040244546
    Abstract: There is provided a vertical lathe which, when machining gradually varying lens grooves in a mold for molding of a Fresnel lens, can change the angle of a cutting tool without positional displacement of the cutting tip, enabling high accuracy machining of the gradually varying lens grooves. The vertical lathe includes: a column; a rotary table for rotating a workpiece; a cantilevered cross rail supported by the column; a saddle movable in a horizontal direction along a guideway of the cross rail; a ram suspended from the saddle and movable vertically along a guideway of the saddle; and an inclined head mounted to the lower end of the ram and having an inclined swivel shaft for holding a cutting tool, wherein said swivel shaft is configured to swivel the cutting tool around a nose of the cutting tool as the center of swiveling.
    Type: Application
    Filed: June 4, 2004
    Publication date: December 9, 2004
    Applicant: TOSHIBA KIKAI KABUSHIKI KAISHA
    Inventors: Masaaki Mitsuzono, Hiromi Yamasaki