Patents by Inventor Kazuo Yanagiya

Kazuo Yanagiya 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 an impeller
    Patent number: 5697152
    Abstract: A vortex flow blower used as an air source to be incorporated into general industrial machines. The vortex flow blower is characterized in that the shape of the blade in its impeller is three dimensionally formed such that at least the inner portion of the blade can be adapted to the three dimensional internal flow. According to the present invention, the aerodynamic performance can be significantly improved and the size of a vortex flow blower can be reduced. Furthermore, an impeller having three dimensionally shaped blades is manufactured by independently manufacturing the shroud and the blades and coupling them, so that the impeller of a complicated shape can be readily manufactured. Furthermore, since the blade can be made of a thin and light material, the secondary moment of inertia of the impeller can be reduced.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: December 16, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Susumu Yamazaki, Eiichi Ito, Hiroshi Asabuki, Masayuki Fujio, Hajime Fujita, Kazuo Kobayashi, Kengo Hasegawa, Yukio Chihara, Hiromoto Ashihara, Takashi Watanabe, Kanzi Mizutani, Yuichi Nakatsuhama, Yukio Makuta, Kazuo Yanagiya, Tomoya Tamura
  • Vortex flow blower having blades each formed by curved surface
    Patent number: 5536139
    Abstract: A vortex flow blower used as an air source to be incorporated into general industrial machines. The vortex flow blower is characterized in that the shape of the blade in its impeller is three dimensionally formed such that at least the inner portion of the blade can be adapted to the three dimensional internal flow. According to the present invention, the aerodynamic performance can be significantly improved and the size of a vortex flow blower can be reduced. Furthermore, an impeller having three dimensionally shaped blades is manufactured by independently manufacturing the shroud and the blades and coupling them, so that the impeller of a complicated shape can be readily manufactured. Furthermore, since the blade can be made of a thin and light material, the secondary moment of inertia of the impeller can be reduced.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: July 16, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Susumu Yamazaki, Eiichi Ito, Hiroshi Asabuki, Masayuki Fujio, Hajime Fujita, Kazuo Kobayashi, Kengo Hasegawa, Yukio Chihara, Hiromoto Ashihara, Takashi Watanabe, Kanzi Mizutani, Yuichi Nakatsuhama, Yukio Makuta, Kazuo Yanagiya, Tomoya Tamura
  • Vortex flow blower having blades each formed by curved surface and method of manufacturing the same
    Patent number: 5395210
    Abstract: A vortex flow blower used as an air source to be incorporated into general industrial machines. The vortex flow blower is characterized in that the shape of the blade in its impeller is three dimensionally formed such that at least the inner portion of the blade can be adapted to the three dimensional internal flow. According to the present invention, the aerodynamic performance can be significantly improved and the size of a vortex flow blower can be reduced. Furthermore, an impeller having three dimensionally shaped blades is manufactured by independently manufacturing the shroud and the blades and coupling them, so that the impeller of a complicated shape can be readily manufactured. Furthermore, since the blade can be made of a thin and light material, the secondary moment of inertia of the impeller can be reduced.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: March 7, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Susumu Yamazaki, Eiichi Ito, Hiroshi Asabuki, Masayuki Fujio, Hajime Fujita, Kazuo Kobayashi, Kengo Hasegawa, Yukio Chihara, Hiromoto Ashihara, Takashi Watanabe, Kanzi Mizutani, Yuichi Nakatsuhama, Yukio Makuta, Kazuo Yanagiya, Tomoya Tamura