Patents by Inventor Ryuichi Okiai

Ryuichi Okiai 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).

  • Heat pipe and method of manufacturing the same
    Patent number: 5314010
    Abstract: A wick layer is attached and fixed to one surface of a metal tape without forming a gap with the metal surface, and thereafter, the tape is rolled to form a pipe, such that the surface having the wick layer serves as an inner surface of the pipe. Trapezoid-shaped projecting surface portions are formed on at least an outer surface portion of the pipe, and project in a predetermined direction.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: May 24, 1994
    Assignee: Fujikura Ltd.
    Inventors: Masuji Sakaya, Ryuichi Okiai, Masataka Mochizuki, Kouichi Mashiko
  • Heat pipe and method of manufacturing the same
    Patent number: 5113932
    Abstract: A wick layer is attached and fixed to one surface of a metal tape without forming a gap with the metal surface, and thereafter, the tape is rolled so that the surface having the wick layer serves as an inner surface, thus forming a pipe shape, then the pipe wall is corrugated. According to the above process, the wick layer is completely and uniformly attached to the inner surface of the heat pipe.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: May 19, 1992
    Assignee: Fujikura Ltd.
    Inventors: Masuji Sakaya, Ryuichi Okiai, Masataka Mochizuki, Kouichi Mashiko
  • Method of manufacturing a heat pipe
    Patent number: 5054196
    Abstract: A wick layer is attached and fixed to one surface of a metal tape without forming a gap with the metal surface, and thereafter, the tape is rolled so that the surface having the wick layer serves as an inner surface, thus forming a pipe shape, then the pipe wall is corrugated. According to the above process, the wick layer is completely and uniformly attached to the inner surface of the heat pipe.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: October 8, 1991
    Assignee: Fujikura Ltd.
    Inventors: Masuji Sakaya, Ryuichi Okiai, Masataka Mochizuki, Kouichi Mashiko
  • Heat pipe and method of manufacturing the same
    Patent number: 5044429
    Abstract: A wick layer is attached and fixed to one surface of a metal tape without forming a gap with the metal surface, and thereafter, the tape is rolled so that the surface having the wick layer serves as an inner surface, thus forming a pipe shape, then the pipe wall is corrugated. According to the above process, the wick layer is completely and uniformly attached to the inner surface of the heat pipe.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: September 3, 1991
    Assignee: Fujikura Ltd.
    Inventors: Masuji Sakaya, Ryuichi Okiai, Masataka Mochizuki, Kouichi Mashiko
  • Method of producing oxide superconducting cables and coils using copper alloy filament precursors
    Patent number: 4965245
    Abstract: A method of producing a superconducting cable or a coil including an A-B-C-D system superconductor where the A includes an element of group IIIa of the Periodic Table, the B an element of group IIa of the Periodic Table, C copper, D oxygen.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: October 23, 1990
    Assignee: Fujikura Ltd.
    Inventors: Masaru Sugimoto, Osamu Kohno, Yoshimitsu Ikeno, Nobuyuki Sadakata, Mikio Nakagawa, Shin'ya Aoki, Masayuki Tan, Ryuichi Okiai, Syotaro Yoshida, Masakazu Hasegawa, Hiroshi Yamanouchi
  • Heat pipe and method of manufacturing the same
    Patent number: 4953632
    Abstract: A wick layer is attached and fixed to one surface of a metal tape without forming a gap with the metal surface, and thereafter, the tape is rolled so that the surface having the wick layer serves as an inner surface, thus forming a pipe shape, then the pipe wall is corrugated. According to the above process, the wick layer is completely and uniformly attached to the inner surface of the heat pipe.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: September 4, 1990
    Assignee: Fujikura Ltd.
    Inventors: Masuji Sakaya, Ryuichi Okiai, Masataka Mochizuki, Kouichi Mashiko
  • Dual-tube heat pipe type heat exchanger
    Patent number: 4909316
    Abstract: Herein disclosed is a dual-tube heat pipe type heat exchanger comprising a heat pipe confined with a working fluid for transferring a heat as a latent heat by repeating evaporations and condensations. The heat pipe includes an outer tube which is disposed within a hot fluid such that its axis is generally horizontal. Further included is an inner tube which is inserted in the outer tube and radially offset upward to substantially contact with the top portion of the inner face of the outer tube and to confine a space between the inner circumference of the outer tube and the outer circumference of the inner tube, thus forming the heat pipe.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: March 20, 1990
    Assignees: Doryokuro Kakunenryo Kaihatsu Jigyodan, Fujikura Ltd.
    Inventors: Mitsuru Kamei, Takao Sakai, Shinichi Sugihara, Motoharu Yatsuhashi, Ryuichi Okiai, Masataka Mochizuki