Patents by Inventor Akiyoshi Masuda

Akiyoshi Masuda 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: 11364957
    Abstract: Provided is a rear vehicle-body structure of a vehicle, capable of reducing vibrations transmitted from a rear wheel to a floor panel, while ensuring required performance for rear side frames and a cross member. The rear vehicle-body structure comprises a symmetric pair of frame members extending in a vehicle longitudinal direction along respective lateral sides of a rear of a vehicle body of the vehicle, and a rear-side rear cross member bridging the symmetric pair of frame members in a vehicle width direction, wherein an attachment portion between each of the frame members and the rear-side rear cross member provided with rigidity difference generation part to generate a rigidity difference between the frame member and the rear-side rear cross member.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: June 21, 2022
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Hajime Ito, Hiroaki Ishizu, Akiyoshi Masuda, Shunsuke Hirai, Yuuki Sano, Masashi Notomi, Takumi Fukuda, Hidemitsu Shinhara, Masahiro Awane, Hidekazu Shiraishi, Yasuhiko Nishida, Takanori Yoshida, Ken Yamada
  • Publication number: 20210366886
    Abstract: A plurality of semiconductor elements connected in parallel with one another include a plurality of first semiconductor elements and a plurality of second semiconductor elements. A drive circuit to provide a gate signal to each of the plurality of semiconductor elements EL includes a main circuit and a plurality of inserted circuits including a first inserted circuit and a second inserted circuit. The first inserted circuit is inserted between the main circuit and the plurality of first semiconductor dements. The second inserted circuit is inserted between the main circuit and the plurality of second semiconductor elements. Each of the first inserted circuit and the second inserted circuit includes a first diode having a forward direction toward the main circuit and a second diode connected in anti-parallel with the first diode.
    Type: Application
    Filed: March 16, 2021
    Publication date: November 25, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akiyoshi MASUDA, Yuji MIYAZAKI
  • Patent number: 11173965
    Abstract: A rear vehicle-body structure comprises a rear-floor front part on which a rear seat is placed and which is inclined such that a front side thereof is located at a higher level than a rear side thereof, a right-and-left reinforcing extension having a rear end that is positioned on both sides, in a vehicle width direction, of the rear-floor front part. The right-and-left reinforcing extension extends forwardly and inwardly, in the vehicle width direction, from the rear end. The rear vehicle-body structure further includes a right-and-left second reinforcing extension provided on an outward side in the vehicle width direction of the right-and-left first reinforcing extension, and is configured to extend forwardly and outwardly in the vehicle width direction from a vicinity of the rear end of the right-and-left first reinforcing extension.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: November 16, 2021
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki Tsukamoto, Akiyoshi Masuda, Kouji Matsushita
  • Publication number: 20210214016
    Abstract: Provided is a rear vehicle-body structure of a vehicle, capable of reducing vibrations transmitted from a rear wheel to a floor panel, while ensuring required performance for rear side frames and a cross member. The rear vehicle-body structure comprises a symmetric pair of frame members 6 extending in a vehicle longitudinal direction along respective lateral sides of a rear of a vehicle body of the vehicle, and a rear-side rear cross member 13 bridging the symmetric pair of frame members 6 in a vehicle width direction, wherein an attachment portion between each of the frame members 6 and the rear-side rear cross member 13 is provided with rigidity difference generation means 20 to generate a rigidity difference between the frame member 6 and the rear-side rear cross member 13.
    Type: Application
    Filed: June 14, 2019
    Publication date: July 15, 2021
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hajime ITO, Hiroaki ISHIZU, Akiyoshi MASUDA, Shunsuke HIRAI, Yuuki SANO, Masashi NOTOMI, Takumi FUKUDA, Hidemitsu SHINHARA, Masahiro AWANE, Hidekazu SHIRAISHI, Yasuhiko NISHIDA, Takanori YOSHIDA, Ken YAMADA
  • Patent number: 11052949
    Abstract: Provided is a rear vehicle body structure that includes: a right and left pair of frame members each extending in a front-rear direction and having a damper supporting part; rear wheel wells; a rear floor panel; a rear cross member upper part connecting the right and left pair of frame members to each other on a front side of the damper supporting parts; front side reinforcements provided along a vehicle cabin inner side of each of the rear wheel wells and extending in an up-down direction on the front side of the damper supporting parts; and a reinforcing member mounted on each of the frame members and having a reinforcing member main body that reinforces the damper supporting part and a reinforcing member coupling part that couples together the rear cross member upper part and the front side reinforcement.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: July 6, 2021
    Assignee: Mazda Motor Corporation
    Inventors: Ken Yamada, Akiyoshi Masuda, Hidenori Matsuoka
  • Patent number: 11040743
    Abstract: A recessed portion is formed at a frame member provided at a rear portion of a vehicle body and having a closed cross section extending in a vehicle longitudinal direction such that a part of a lower face of the frame member is recessed upwardly, where a damper of a rear suspension is inserted and fixed. A front portion of the frame member is joined to a side sill extending in the vehicle longitudinal direction at a position offset outwardly in a vehicle width direction from the frame member. Branch-shaped closed cross sections branching off from the closed cross section inwardly and outwardly relative to the damper are formed at a position corresponding to the recessed portion of the frame member. A portion of the frame member located at the above-described position is wide outwardly.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: June 22, 2021
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki Tsukamoto, Ken Yamada, Akiyoshi Masuda, Hidenori Matsuoka, Koji Matsushita
  • Patent number: 10940890
    Abstract: A recessed portion is formed at a frame member provided at a rear portion of a vehicle body and having a closed cross section extending in a vehicle longitudinal direction, wherein the recessed portion is configured such that a lower face of the frame member is recessed upwardly and a damper is inserted into and fixed to the recessed portion. Closed cross sections are formed inside the frame member at a position corresponding to the recessed portion. These closed cross sections are configured to branch off from the closed cross section outwardly and inwardly relative to the damper. A reinforcing member is fixed to the frame member and a wheel house inner at the position corresponding to the recessed portion such that a space is formed at a corner portion of these.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: March 9, 2021
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki Tsukamoto, Ken Yamada, Akiyoshi Masuda, Hidenori Matsuoka
  • Patent number: 10730564
    Abstract: A recessed portion is formed at a lower face of a frame member provided at a vehicle rear portion and having a closed cross section extending in a vehicle longitudinal direction, where a damper of a rear suspension is inserted into and fixed. A front portion of the frame member is joined to a side sill extending in the vehicle longitudinal direction at a position offset outwardly from the frame member. Branch-shaped closed cross sections branching off from the closed cross section inwardly and outwardly relative to the damper are formed at a recessed-portion corresponding position. A front portion of the frame member located in front of the recessed-portion corresponding position extends in an oblique direction forwardly and outwardly and a front end of the frame member is joined to a rear portion of the side sill.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: August 4, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki Tsukamoto, Ken Yamada, Akiyoshi Masuda, Hidenori Matsuoka
  • Patent number: 10730567
    Abstract: A recessed portion is formed at a frame member provided at a rear portion of a vehicle body and having a closed cross section extending in a vehicle longitudinal direction such that a part of a lower face of the frame member is recessed upwardly, where a damper of a rear suspension is inserted and fixed. Closed cross sections are formed at a position corresponding to the recessed portion, in a longitudinal direction, of the frame member. The closed cross sections are configured to branch off from the closed cross section inwardly and outwardly in the vehicle width direction relative to the damper. A ridgeline extending in the vehicle longitudinal direction is formed at least at a portion of the frame member which is positioned in front of the recessed portion.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: August 4, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki Tsukamoto, Ken Yamada, Akiyoshi Masuda, Hidenori Matsuoka, Koji Matsushita
  • Publication number: 20200231221
    Abstract: A rear vehicle-body structure comprises a rear-floor front part on which a rear seat is placed and which is inclined such that a front side thereof is located at a higher level than a rear side thereof, a right-and-left reinforcing extension having a rear end that is positioned on both sides, in a vehicle width direction, of the rear-floor front part. The right-and-left reinforcing extension extends forwardly and inwardly, in the vehicle width direction, from the rear end. The rear vehicle-body structure further includes a right-and-left second reinforcing extension provided on an outward side in the vehicle width direction of the right-and-left first reinforcing extension, and is configured to extend forwardly and outwardly in the vehicle width direction from a vicinity of the rear end of the right-and-left first reinforcing extension.
    Type: Application
    Filed: January 17, 2020
    Publication date: July 23, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki TSUKAMOTO, Akiyoshi MASUDA, Kouji MATSUSHITA
  • Patent number: 10647362
    Abstract: A rear vehicle-body structure of a vehicle comprises a wheel house provided at a side face portion of a vehicle-body rear portion, a side frame extending in a vehicle longitudinal direction on an inward side, in a vehicle width direction, of the wheel house, a suspension comprising a damper provided to extend in a vehicle vertical direction for damping a vertical load inputted from a wheel thereto and a bump stopper provided on a shaft center of the damper, and a suspension housing including a support face portion for supporting the damper and provided to connect the side frame and the wheel house, wherein the suspension housing comprises a peripheral wall portion which is provided to extend downward from the support face portion and enclose the bump stopper at least partially.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: May 12, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Akiyoshi Masuda, Shin Murata, Mitsuo Iwano, Yasutomo Abe, Shigeaki Watanabe, Hideyuki Tsukamoto, Hidenori Matsuoka
  • Patent number: 10640150
    Abstract: A rear vehicle-body structure of a vehicle comprises a wheel house, a side frame, a suspension comprising a damper and a spring, and a suspension housing connecting the side frame and the wheel house. The suspension housing includes a supporting part for supporting the damper and a spring receiving part for supporting an upper end portion of the spring at a position located on an outward side, in a vehicle width direction, of the side frame and on an upward side, in a vehicle vertical direction, of a lower end of the side frame. Further, connection portions connecting, in the vehicle vertical direction, the side frame and the spring receiving part are provided on a downward side, in the vehicle vertical direction, of the spring receiving part.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: May 5, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Akiyoshi Masuda, Shigeaki Watanabe, Hideyuki Tsukamoto, Tomohiro Eiju, Hidenori Matsuoka
  • Publication number: 20200086922
    Abstract: Provided is a rear vehicle body structure that includes: a right and left pair of frame members each extending in a front-rear direction and having a damper supporting part; rear wheel wells; a rear floor panel; a rear cross member upper part connecting the right and left pair of frame members to each other on a front side of the damper supporting parts; front side reinforcements provided along a vehicle cabin inner side of each of the rear wheel wells and extending in an up-down direction on the front side of the damper supporting parts; and a reinforcing member mounted on each of the frame members and having a reinforcing member main body that reinforces the damper supporting part and a reinforcing member coupling part that couples together the rear cross member upper part and the front side reinforcement.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 19, 2020
    Inventors: Ken Yamada, Akiyoshi Masuda, Hidenori Matsuoka
  • Patent number: 10494031
    Abstract: A rear vehicle-body structure of a vehicle comprises a wheel house, a side frame, a suspension comprising a damper, and a suspension housing connecting the side frame and the wheel house. The suspension housing includes a support face portion for supporting the damper, a level floor portion which extends outward from its connection portion to the side frame, and a vertical wall portion which extends upward from an outward-side edge portion, in a vehicle width direction, of the level floor portion up to an inward-side edge portion, in the vehicle width direction, of the support face portion.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: December 3, 2019
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Akiyoshi Masuda, Shigeaki Watanabe, Hideyuki Tsukamoto, Hidenori Matsuoka
  • Publication number: 20190291782
    Abstract: A recessed portion is formed at a frame member provided at a rear portion of a vehicle body and having a closed cross section extending in a vehicle longitudinal direction, wherein the recessed portion is configured such that a lower face of the frame member is recessed upwardly and a damper is inserted into and fixed to the recessed portion. Closed cross sections are formed inside the frame member at a position corresponding to the recessed portion. These closed cross sections are configured to branch off from the closed cross section outwardly and inwardly relative to the damper. A reinforcing member is fixed to the frame member and a wheel house inner at the position corresponding to the recessed portion such that a space is formed at a corner portion of these.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 26, 2019
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki TSUKAMOTO, Ken YAMADA, Akiyoshi MASUDA, Hidenori MATSUOKA
  • Publication number: 20190291787
    Abstract: A recessed portion is formed at a frame member provided at a rear portion of a vehicle body and having a closed cross section extending in a vehicle longitudinal direction such that a part of a lower face of the frame member is recessed upwardly, where a damper of a rear suspension is inserted and fixed. A front portion of the frame member is joined to a side sill extending in the vehicle longitudinal direction at a position offset outwardly in a vehicle width direction from the frame member. Branch-shaped closed cross sections branching off from the closed cross section inwardly and outwardly relative to the damper are formed at a position corresponding to the recessed portion of the frame member. A portion of the frame member located at the above-described position is wide outwardly.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 26, 2019
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki TSUKAMOTO, Ken YAMADA, Akiyoshi MASUDA, Hidenori MATSUOKA, Koji MATSUSHITA
  • Publication number: 20190291788
    Abstract: A recessed portion is formed at a frame member provided at a rear portion of a vehicle body and having a closed cross section extending in a vehicle longitudinal direction such that a part of a lower face of the frame member is recessed upwardly, where a damper of a rear suspension is inserted and fixed. Closed cross sections are formed at a position corresponding to the recessed portion, in a longitudinal direction, of the frame member. The closed cross sections are configured to branch off from the closed cross section inwardly and outwardly in the vehicle width direction relative to the damper. A ridgeline extending in the vehicle longitudinal direction is formed at least at a portion of the frame member which is positioned in front of the recessed portion.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 26, 2019
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki TSUKAMOTO, Ken YAMADA, Akiyoshi MASUDA, Hidenori MATSUOKA, Koji MATSUSHITA
  • Publication number: 20190291786
    Abstract: A recessed portion is formed at a lower face of a frame member provided at a vehicle rear portion and having a closed cross section extending in a vehicle longitudinal direction, where a damper of a rear suspension is inserted into and fixed. A front portion of the frame member is joined to a side sill extending in the vehicle longitudinal direction at a position offset outwardly from the frame member. Branch-shaped closed cross sections branching off from the closed cross section inwardly and outwardly relative to the damper are formed at a recessed-portion corresponding position. A front portion of the frame member located in front of the recessed-portion corresponding position extends in an oblique direction forwardly and outwardly and a front end of the frame member is joined to a rear portion of the side sill.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 26, 2019
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hideyuki TSUKAMOTO, Ken YAMADA, Akiyoshi MASUDA, Hidenori MATSUOKA
  • Patent number: 10253218
    Abstract: An adhesive tape includes: a sheet-like base; an undercoat layer that is laminated on the base and contains an acid modified compound; and an adhesive agent layer that is laminated on the undercoat layer and contains butyl rubber, an alicyclic saturated hydrocarbon resin and a multifunctional epoxy-based compound.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: April 9, 2019
    Assignee: MAXELL HOLDINGS, LTD.
    Inventors: Tadahiko Nakagawa, Masahiro Saigo, Akiyoshi Masuda
  • Publication number: 20190092394
    Abstract: A structure for the rear part of the body of a vehicle is provided with a suspension tower section to which a suspension is mounted. The suspension tower section has: a tower upper wall section which is formed in a fan-like shape, in a plan view, having an circular arc-shaped outer peripheral edge section located inside in the vehicle width direction, and which has a suspension fastening section to which the upper end of the suspension is fastened and affixed; a tower bend section which is a portion of the outer peripheral edge section, the portion bending downward; a tower outer peripheral wall section which extends downward from the tower bend section; and a first tower vertical wall section which is raised along the suspension tower section and extends downward from an end in the peripheral direction of the tower bend section to the tower outer peripheral wall section.
    Type: Application
    Filed: March 24, 2017
    Publication date: March 28, 2019
    Inventor: Akiyoshi Masuda