Patents by Inventor Shigeyoshi KAWAKITA

Shigeyoshi KAWAKITA 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).

  • Publication number: 20220010786
    Abstract: A piston is provided with a piston body that includes an internal space and a leading end member that includes an insertion portion placed in the internal space and a protrusion protruding from a leading end surface of the piston body.
    Type: Application
    Filed: November 15, 2019
    Publication date: January 13, 2022
    Applicant: Komatsu Ltd.
    Inventors: Shunsuke Koide, Hiroaki Motoshima, Shigeyoshi Kawakita
  • Publication number: 20210231112
    Abstract: A swash-plate type piston pump motor includes: a rotary shaft; a cylinder block that rotates together with the rotary shaft; a plurality of pistons (5) each of which is inserted so as to be reciprocable in each of a plurality of cylinders formed in the cylinder block; a plurality of piston shoes (6) attached so as to be swingable to an end portion (501) of each piston; a swash plate (7) inclined with respect to an axis of the rotary shaft and having a sliding surface (41) being in contact with a plurality of piston shoes; and a shoe retainer (8) configured to press the piston shoe against the sliding surface. Each piston shoe includes a shoe body (71) being in contact with a sliding surface, and an elastic body (79) provided between the shoe body and the shoe retainer.
    Type: Application
    Filed: March 13, 2019
    Publication date: July 29, 2021
    Inventors: Shigeyoshi KAWAKITA, Shunsuke KOIDE, Hiroaki MOTOSHIMA