Patents by Inventor Ryotaro HIRATA

Ryotaro HIRATA 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: 10994786
    Abstract: Provided is a structure for a front part of a vehicle, including a vehicle main body, a pair of suspension support portions, and a cowl member connected to the pair of suspension support portions. The cowl member has: an inner part connection portion which has a shape extending continuously in a vehicle width direction between the pair of suspension support portions and which interconnects respective inner parts of the pair of suspension support portions in the vehicle width direction; and a water drain portion which is provided backward of the inner part connection portion in a front-rear direction of the vehicle and drains water toward a side part of the vehicle in the vehicle width direction. The inner part connection portion has a thickness larger than a thickness of the water drain portion.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: May 4, 2021
    Assignees: KOBE STEEL, LTD., MAZDA MOTOR CORPORATION
    Inventors: Masatoshi Yoshida, Tadashi Yamazaki, Ryotaro Hirata
  • Patent number: 10960457
    Abstract: A cavity (20) provided for a die body (2) at one side thereof in an axial direction includes a cavity bottom surface (21), on which a protrusion (40) jutting toward the one side in the axial direction is formed. A tip end face (41) of the protrusion (40) is configured as a flat surface extending in a direction substantially orthogonal to the axial direction and having a predetermined width (W1) in a radial direction. The predetermined width (W1) of the tip end face (41) is set to be 10% or more of a diameter (Di1) of the cavity (20) at an open end thereof.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: March 30, 2021
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Yoshihiro Kawasaki, Noboru Shimizu, Ryotaro Hirata
  • Publication number: 20200156143
    Abstract: A cavity (20) provided for a die body (2) at one side thereof in an axial direction includes a cavity bottom surface (21), on which a protrusion (40) jutting toward the one side in the axial direction is formed. A tip end face (41) of the protrusion (40) is configured as a flat surface extending in a direction substantially orthogonal to the axial direction and having a predetermined width (W1) in a radial direction. The predetermined width (W1) of the tip end face (41) is set to be 10% or more of a diameter (Di1) of the cavity (20) at an open end thereof.
    Type: Application
    Filed: April 16, 2018
    Publication date: May 21, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Yoshihiro KAWASAKI, Noboru SHIMIZU, Ryotaro HIRATA
  • Publication number: 20200023907
    Abstract: Provided is a structure for a front part of a vehicle, including a vehicle main body, a pair of suspension support portions, and a cowl member connected to the pair of suspension support portions. The cowl member has: an inner part connection portion which has a shape extending continuously in a vehicle width direction between the pair of suspension support portions and which interconnects respective inner parts of the pair of suspension support portions in the vehicle width direction; and a water drain portion which is provided backward of the inner part connection portion in a front-rear direction of the vehicle and drains water toward a side part of the vehicle in the vehicle width direction. The inner part connection portion has a thickness larger than a thickness of the water drain portion.
    Type: Application
    Filed: March 9, 2018
    Publication date: January 23, 2020
    Applicants: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), MAZDA MOTOR CORPORATION
    Inventors: Masatoshi YOSHIDA, Tadashi YAMAZAKI, Ryotaro HIRATA
  • Patent number: 9944330
    Abstract: An upper face portion of a suspension tower portion of a vehicle comprises an fastening face portion where plural fastening portions to which an upper-side attached portion of a suspension is fixedly fastened are provided and a top face portion which is provided at a higher level than the fastening face portion so as to face the upper-side attached portion of the suspension, the top face portion being connected to a central portion of the fastening face portion via a vertical wall portion. An inner-peripheral-side rib is provided on an inner-peripheral side of the vertical wall portion.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: April 17, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Miho Kowaki, Sakayu Terada, Ryotaro Hirata
  • Patent number: 9878742
    Abstract: A suspension tower portion structure of a vehicle is configured such that an upper face portion of a suspension tower portion comprises an fastening face portion where plural fastening portions to which an upper-side attached portion of a suspension is fixedly fastened are provided, plural arc-shaped wall portions which are each provided to rise around the fastening portion are provided on the fastening face portion, and the arc-shaped wall portion is configured to be spaced apart from a fastening seat portion of a fastening member to be fastened to the fastening portion 11, having a constant distance therebetween.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: January 30, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Miho Kowaki, Sakayu Terada, Takehiro Kamei, Ryotaro Hirata
  • Publication number: 20170080983
    Abstract: A suspension tower portion structure of a vehicle is configured such that an upper face portion of a suspension tower portion comprises an fastening face portion where plural fastening portions to which an upper-side attached portion of a suspension is fixedly fastened are provided, plural arc-shaped wall portions which are each provided to rise around the fastening portion are provided on the fastening face portion, and the arc-shaped wall portion is configured to be spaced apart from a fastening seat portion of a fastening member to be fastened to the fastening portion 11, having a constant distance therebetween.
    Type: Application
    Filed: August 4, 2016
    Publication date: March 23, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Miho KOWAKI, Sakayu TERADA, Takehiro KAMEI, Ryotaro HIRATA
  • Publication number: 20170080982
    Abstract: An upper face portion of a suspension tower portion of a vehicle comprises an fastening face portion where plural fastening portions to which an upper-side attached portion of a suspension is fixedly fastened are provided and a top face portion which is provided at a higher level than the fastening face portion so as to face the upper-side attached portion of the suspension, the top face portion being connected to a central portion of the fastening face portion via a vertical wall portion. An inner-peripheral-side rib is provided on an inner-peripheral side of the vertical wall portion.
    Type: Application
    Filed: August 4, 2016
    Publication date: March 23, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Miho KOWAKI, Sakayu TERADA, Ryotaro HIRATA
  • Patent number: 9302641
    Abstract: A guard bar has an inverse-U shape, and its inward end portion is configured to pass through a cross bar and be welded to the cross bar and its outward end portion is fixed to the cross bar via a junction member. The junction member has a reinforcement portion which is fastened together with a link bracket and the cross bar. Thus, there can be provided a seatback bar structure of a vehicle which can properly attach the guard bar, considering the manufacturing accuracy of extrusion molding of aluminum or aluminum alloy, and also can properly transmit a load inputted to the guard bar in a vehicle's rollover to a leg portion and side panels so as to achieve appropriate load dispersion.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: April 5, 2016
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Ryotaro Hirata, Kei Uchibori
  • Publication number: 20150158449
    Abstract: A guard bar has an inverse-U shape, and its inward end portion is configured to pass through a cross bar and be welded to the cross bar and its outward end portion is fixed to the cross bar via a junction member. The junction member has a reinforcement portion which is fastened together with a link bracket and the cross bar. Thus, there can be provided a seatback bar structure of a vehicle which can properly attach the guard bar, considering the manufacturing accuracy of extrusion molding of aluminum or aluminum alloy, and also can properly transmit a load inputted to the guard bar in a vehicle's rollover to a leg portion and side panels so as to achieve appropriate load dispersion.
    Type: Application
    Filed: December 4, 2014
    Publication date: June 11, 2015
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Ryotaro HIRATA, Kei UCHIBORI