Patents by Inventor Kosuke SUDO

Kosuke SUDO 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).

  • Compressor
    Patent number: 12529375
    Abstract: A compressor has a piston that has a piston ring groove in an outer circumferential surface formed of a curved surface and reciprocates while rocking in a cylinder, a piston ring that is mounted in the piston ring groove and slides on an inner circumferential surface of the cylinder, and a crankshaft that reciprocates the piston through a connecting rod. A center axis of the cylinder is disposed at a position separate from a rotation axis of the crankshaft. A rotation stopper for the piston ring is disposed in the piston ring groove. Joint gaps of the piston ring are located on a side of the outer circumferential surface of the piston pressed against the inner circumferential surface of the cylinder in a compression process.
    Type: Grant
    Filed: November 15, 2022
    Date of Patent: January 20, 2026
    Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO. LTD.
    Inventors: Kosuke Sudo, Nobuyuki Narisawa, Sho Goto, Naoya Hasegawa
  • COMPRESSOR
    Publication number: 20250188921
    Abstract: A compressor has a piston that has a piston ring groove in an outer circumferential surface formed of a curved surface and reciprocates while rocking in a cylinder, a piston ring that is mounted in the piston ring groove and slides on an inner circumferential surface of the cylinder, and a crankshaft that reciprocates the piston through a connecting rod. A center axis of the cylinder is disposed at a position separate from a rotation axis of the crankshaft. A rotation stopper for the piston ring is disposed in the piston ring groove. Joint gaps of the piston ring are located on a side of the outer circumferential surface of the piston pressed against the inner circumferential surface of the cylinder in a compression process.
    Type: Application
    Filed: November 15, 2022
    Publication date: June 12, 2025
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Kosuke SUDO, Nobuyuki NARISAWA, Sho GOTO, Naoya HASEGAWA