Patents by Inventor Yoshihiro Namekawa

Yoshihiro Namekawa 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).

  • Method of manufacturing a hose coupling from an intermediate blank material
    Patent number: 6189199
    Abstract: A method of manufacturing a hose coupling from an intermediate blank material, the hose coupling having an inner tube or tubular nipple portion, an outer tube or tubular sleeve portion and a head portion, all formed by plastic deformation from an intermediate blank material. The head portion is provided with a bore at an end opposite the end where the nipple portion and the sleeve portion are joined. In addition, the head portion is internally provided with a female thread and a conical seal portion.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: February 20, 2001
    Assignee: Hitachi Cable, Ltd.
    Inventors: Koji Ouchi, Tokuju Maeno, Yoshihiro Namekawa, Hideki Hagiwara, Katsuhiro Aoyagi, Norio Tanioka, Kenji Hirose, Hisanobu Kanamaru, Hiroya Murakami
  • Fluid conveying hose
    Patent number: 4510974
    Abstract: A plastic hose suitable for conveying refrigerant in a liquid or gas phase, liquefied gas such as LPG, volatile liquids, or gases such as CO.sub.2, O.sub.2 or N.sub.2 having an impermeable layer or a barrier. The amount of permeation of the gas in the hose to the outside and the amount of permeation of moisture into the hose are limited to extremely small values.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: April 16, 1985
    Assignee: Hitachi Cable Ltd.
    Inventors: Takeshi Natori, Yoji Kobayashi, Shigetaka Watanabe, Katsumi Shimizu, Ikuei Matsumura, Yoshihiro Namekawa, Satoshi Miyanaga