Patents by Inventor Takahiro Ryu

Takahiro Ryu 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: 10508709
    Abstract: In a vibration damping device 20, the moment of inertia J1 of a driven member 15, the moment of inertia J2 of an inertial mass body 23, the mass m of crank members 22, the distance L3 between the center of gravity G of the crank member 22 and the fulcrum of swinging of the crank member 22 with respect to the inertial mass body 23, and the distance L4 between this fulcrum and the center of rotation RC are determined so that torque fluctuation of an object for which vibration is to be damped, which is derived based on angular displacement and angles obtained by solving an equation of motion for the driven member 15 and an equation of motion for the entire vibration damping device 20 is equal to a target value.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: December 17, 2019
    Assignees: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, Kagoshima University
    Inventors: Yoichi Oi, Masaki Wajima, Hiroki Nagai, Takao Sakamoto, Takahiro Ryu, Takashi Nakae, Kenichiro Matsuzaki
  • Publication number: 20190226552
    Abstract: In a vibration damping device 20, the moment of inertia J1 of a driven member 15, the moment of inertia J2 of an inertial mass body 23, the mass m of crank members 22, the distance L3 between the center of gravity G of the crank member 22 and the fulcrum of swinging of the crank member 22 with respect to the inertial mass body 23, and the distance L4 between this fulcrum and the center of rotation RC are determined so that torque fluctuation of an object for which vibration is to be damped, which is derived based on angular displacement and angles obtained by solving an equation of motion for the driven member 15 and an equation of motion for the entire vibration damping device 20 is equal to a target value.
    Type: Application
    Filed: September 29, 2017
    Publication date: July 25, 2019
    Applicants: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, Kagoshima University
    Inventors: Yoichi OI, Masaki WAJIMA, Hiroki NAGAI, Takao SAKAMOTO, Takahiro RYU, Takashi NAKAE, Kenichiro MATSUZAKI
  • Publication number: 20180187744
    Abstract: A vibration damping device 20 includes: a crank member 22 that is coupled to a driven member 15 via a first coupling shaft A1 and that is swingable about the first coupling shaft A1 along with rotation of the driven member 15; and an inertial mass body 24 that is coupled to the driven member 15 via the crank member 22 and a connecting rod 23 and that is swung about a center of rotation RC in conjunction with the crank member 22 along with rotation of the driven member 15. A component force of a centrifugal force that acts on the crank member 22 along with rotation of the driven member 15 in a direction that is orthogonal to the direction from the center of the first coupling shaft A1 toward the center of gravity G always acts on the crank member 22 as a restoring force that acts to return the inertial mass body 24 to the center of the swing range. The component force is maximum when the inertial mass body 24 is positioned at the center of the swing range.
    Type: Application
    Filed: July 15, 2016
    Publication date: July 5, 2018
    Applicants: AISIN AW CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY, KAGOSHIMA UNIVERSITY
    Inventors: Yoshihiro TAKIKAWA, Hiroki NAGAI, Masaki WAJIMA, Takao SAKAMOTO, Takahiro RYU, Takashi NAKAE, Kenichiro MATSUZAKI
  • Patent number: 7060161
    Abstract: There is provided a method for restraining deformation of a nip roll, in which polygonal deformation of nip rolls that are in contact with each other is restrained, so that vibration produced by the deformation is decreased. The diameter ratio between the first and second nip rolls 1 and 2 is set at a value different from 1, by which both of the numbers of polygon sides of the rolls 1 and 2 are prevented from becoming integers or values close to integers. Thereby, polygonal deformation of nip rolls that are in contact with each other, so that vibration produced by the deformation is decreased.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: June 13, 2006
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hideki Hirooka, Kiyoshi Nakano, Hiroshi Miura, Atsuo Sueoka, Takahiro Ryu
  • Publication number: 20050223913
    Abstract: There is provided a method for restraining deformation of a nip roll, in which polygonal deformation of nip rolls that are in contact with each other is restrained, so that vibration produced by the deformation is decreased. The diameter ratio between the first and second nip rolls 1 and 2 is set at a value different from 1, by which both of the numbers of polygon sides of the rolls 1 and 2 are prevented from becoming integers or values close to integers. Thereby, polygonal deformation of nip rolls that are in contact with each other, so that vibration produced by the deformation is decreased.
    Type: Application
    Filed: March 11, 2004
    Publication date: October 13, 2005
    Applicant: MITSUBISHI HEAVY INDUSTRIES LTD.
    Inventors: Hideki Hirooka, Kiyoshi Nakano, Hiroshi Miura, Atsuo Sueoka, Takahiro Ryu