Patents by Inventor Mineo Tanahashi

Mineo Tanahashi 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).

  • PISTON ROD MANUFACTURING METHOD
    Publication number: 20120160899
    Abstract: A piston rod manufacturing method for manufacturing a piston rod by joining together respective end surfaces of a rod main body and a rod head, includes a first step of hollowing out respective axial center portions of the rod main body and the rod head from the respective end surfaces thereof in order to remove impurities caused by center segregation, and a second step of joining together the respective end surfaces of the rod main body and the rod head by friction welding.
    Type: Application
    Filed: June 7, 2010
    Publication date: June 28, 2012
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Masaki Dogami, Minoru Tamai, Kazuo Ueno, Mineo Tanahashi
  • Hydraulic cylinder with press-fitted pipe
    Patent number: 5960696
    Abstract: It is intended to dispense with the pipe welding work, thereby improve the pipe mounting performance and prevent contamination which results from welding, and elimination the waste of oil.A spigot portion 34 is mounted upright integrally in the center of the upper end portion of a piston 17, the base end of a piston rod 18 is fitted on the outer periphery of the spigot portion 34, and the outer periphery of the base end of a pipe 41 is press-fitted into an upper hollow part of the spigot portion 34.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: October 5, 1999
    Assignee: Kayaba Kogyo Kabushiki Kaisha
    Inventors: Susumu Niwa, Mineo Tanahashi