Patents by Inventor Yoshinari Rokken

Yoshinari Rokken 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).

  • Connection-structure of a flexible tube
    Patent number: 8523242
    Abstract: A connection-structure of a flexible tube, in which the flexible tube is fitted to an end portion of a metal pipe, comprises an annular projection, a first radially enlarged portion, a seal ring and a second radially enlarged portion. The annular projection is formed on an outer surface of the end portion of the metal pipe. The first radially enlarged portion is formed on the tip side of the metal pipe relative to the projection, defining a first annular groove with the projection. The seal ring is fitted into the annular groove. The second enlarged portion is formed on the base side of the metal pipe relative to the projection, defining a second annular groove with the projection. The tip portion of the flexible tube is positioned close to the maximum diameter portion of the second enlarged portion.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: September 3, 2013
    Assignees: Nitta Corporation, FTS Co., Ltd.
    Inventors: Satoru Hosotani, Yoshinari Rokken, Jun Okada, Takeshi Amano
  • CONNECTION-STRUCTURE OF A FLEXIBLE TUBE
    Publication number: 20120217740
    Abstract: A connection-structure of a flexible tube, in which the flexible tube is fitted to an end portion of a metal pipe, comprises an annular projection, a first radially enlarged portion, a seal ring and a second radially enlarged portion. The annular projection is formed on an outer surface of the end portion of the metal pipe. The first radially enlarged portion is formed on the tip side of the metal pipe relative to the projection, defining a first annular groove with the projection. The seal ring is fitted into the annular groove. The second enlarged portion is formed on the base side of the metal pipe relative to the projection, defining a second annular groove with the projection. The tip portion of the flexible tube is positioned close to the maximum diameter portion of the second enlarged portion.
    Type: Application
    Filed: February 23, 2012
    Publication date: August 30, 2012
    Applicants: FTS Co., LTD., NITTA CORPORATION
    Inventors: Satoru Hosotani, Yoshinari Rokken, Jun Okada, Takeshi Amano