Patents by Inventor Fumito Hiratani

Fumito Hiratani 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).

  • Impeller and centrifugal compressor
    Patent number: 11835058
    Abstract: An impeller includes: a disk-shaped hub centered on an axis; and a plurality of blades arranged in a circumferential direction and protruding from a surface of the hub facing one side in a direction of the axis. In a cross-sectional view including a blade height direction which is a direction away from the hub toward a tip of each blade, the blade has a recessed surface curved convexly toward a rear side in a rotational direction. In the cross-sectional view, when a distance between an imaginary line connecting a tip-side edge and a hub-side edge of the blade and a midspan of the blade along a direction perpendicular to the imaginary line is defined as a recess amount, the blade has a portion where the recess amount increases from a leading edge side to a trailing edge side.
    Type: Grant
    Filed: April 21, 2021
    Date of Patent: December 5, 2023
    Assignee: MITSUBISHI HEAVY INDUSTRIES MARINE MACHINERY & EQUIPMENT CO., LTD.
    Inventors: Hironori Honda, Nao Taniguchi, Fumito Hiratani, Isao Tomita, Tetsuya Matsuo, Taiyo Shirakawa
  • IMPELLER AND CENTRIFUGAL COMPRESSOR
    Publication number: 20230123100
    Abstract: An impeller includes: a disk-shaped hub centered on an axis; and a plurality of blades arranged in a circumferential direction and protruding from a surface of the hub facing one side in a direction of the axis. In a cross-sectional view including a blade height direction which is a direction away from the hub toward a tip of each blade, the blade has a recessed surface curved convexly toward a rear side in a rotational direction. In the cross-sectional view, when a distance between an imaginary line connecting a tip-side edge and a hub-side edge of the blade and a midspan of the blade along a direction perpendicular to the imaginary line is defined as a recess amount, the blade has a portion where the recess amount increases from a leading edge side to a trailing edge side.
    Type: Application
    Filed: April 21, 2021
    Publication date: April 20, 2023
    Applicant: Mitsubishi Heavy Industries Marine Machinery & Equipment Co., Ltd.
    Inventors: Hironori Honda, Nao Taniguchi, Fumito Hiratani, Isao Tomita, Tetsuya Matsuo, Taiyo Shirakawa
  • Impeller back surface cooling structure and supercharger
    Patent number: 11199201
    Abstract: An impeller back surface cooling structure for cooling a back surface of a compressor impeller of a supercharger includes: a first member facing a back surface of a compressor impeller via a gap; and a second member extending in a circumferential direction of the compressor impeller and forming, between the first member and the second member, a cooling passage through which a cooling medium being a liquid flows.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: December 14, 2021
    Assignee: MITSUBISHI HEAVY INDUSTRIES MARINE MACHINERY & EQUIPMENT CO., LTD.
    Inventors: Satoshi Makino, Koichi Sugimoto, Fumito Hiratani, Yukihiro Iwasa, Yoshihisa Ono
  • IMPELLER BACK SURFACE COOLING STRUCTURE AND SUPERCHARGER
    Publication number: 20180216633
    Abstract: An impeller back surface cooling structure for cooling a back surface of a compressor impeller of a supercharger includes: a first member facing a back surface of a compressor impeller via a gap; and a second member extending in a circumferential direction of the compressor impeller and forming, between the first member and the second member, a cooling passage through which a cooling medium being a liquid flows.
    Type: Application
    Filed: January 18, 2017
    Publication date: August 2, 2018
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Satoshi Makino, Koichi Sugimoto, Fumito Hiratani, Yukihiro Iwasa, Yoshihisa Ono