Patents by Inventor Shingo KARIKAWA

Shingo KARIKAWA 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).

  • Rotary piston engine
    Patent number: 10982592
    Abstract: Each of recesses in outer circumferential surfaces of rotors includes: a leading-side area extending forward from a longitudinal center of an associated one of the outer circumferential surfaces in a rotation direction of the rotor, and a trailing-side area continuous with the leading-side area, and extending rearward from the longitudinal center in the rotation direction. From the longitudinal center of the associated one of the outer circumferential surfaces in the rotation direction, forward extension of the leading-side area is longer than rearward extension of the trailing-side area. The leading-side area has a larger volume than the trailing-side area.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: April 20, 2021
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Kiyotaka Tanaka, Ryo Itonaka, Shinichiro Maeda, Shingo Karikawa, Hiromi Yoshioka
  • ROTARY PISTON ENGINE
    Publication number: 20200025063
    Abstract: Each of recesses in outer circumferential surfaces of rotors includes: a leading-side area extending forward from a longitudinal center of an associated one of the outer circumferential surfaces in a rotation direction of the rotor, and a trailing-side area continuous with the leading-side area, and extending rearward from the longitudinal center in the rotation direction. From the longitudinal center of the associated one of the outer circumferential surfaces in the rotation direction, forward extension of the leading-side area is longer than rearward extension of the trailing-side area. The leading-side area has a larger volume than the trailing-side area.
    Type: Application
    Filed: June 13, 2019
    Publication date: January 23, 2020
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kiyotaka TANAKA, Ryo ITONAKA, Shinichiro MAEDA, Shingo KARIKAWA, Hiromi YOSHIOKA