Patents by Inventor Yuuichi Nakamaru

Yuuichi Nakamaru 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).

  • Liquid sealed vibration isolating device
    Patent number: 9488246
    Abstract: An elastic partition member located in the partition member is integrally provided with a relief valve that opens and closes a leak passage to suppress the generation of the cavitation phenomenon. A pair of relief valves is formed in a crescent shape on the outer circumferential side of the movable diaphragm section in opposed relation. The crescent shape of the relief valve is formed by an inner circumferential side of elliptical arc shape and an outer circumferential side of circular arc shape. A valve length of the relief valve varies in the longitudinal direction such that a middle portion in the longitudinal direction is largest. is easily deformed when the extraordinary vibration is inputted. Each end portion in the longitudinal direction of the relief valve is short in valve length and high in rigidity whereby to prevent the leak when the normal vibration is inputted.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: November 8, 2016
    Assignees: YAMASHITA RUBBER KABUSHIKI KAISHA, HONDA MOTOR CO., LTD.
    Inventors: Kazutoshi Satori, Teruyuki Hirokawa, Yuuichi Nakamaru, Atsushi Komatsu
  • LIQUID SEALED VIBRATION ISOLATING DEVICE
    Publication number: 20150330476
    Abstract: An elastic partition member located in the partition member is integrally provided with a relief valve that opens and closes a leak passage to suppress the generation of the cavitation phenomenon. A pair of relief valves is formed in a crescent shape on the outer circumferential side of the movable diaphragm section in opposed relation. The crescent shape of the relief valve is formed by an inner circumferential side of elliptical arc shape and an outer circumferential side of circular arc shape. A valve length of the relief valve varies in the longitudinal direction such that a middle portion in the longitudinal direction is largest. is easily deformed when the extraordinary vibration is inputted. Each end portion in the longitudinal direction of the relief valve is short in valve length and high in rigidity whereby to prevent the leak when the normal vibration is inputted.
    Type: Application
    Filed: December 18, 2013
    Publication date: November 19, 2015
    Applicants: YAMASHITA RUBBER KABUSHIKI KAISHA, HONDA MOTOR CO., LTD.
    Inventors: Kazutoshi Satori, Teruyuki Hirokawa, Yuuichi Nakamaru, Atsushi Komatsu