Patents Assigned to Nidec Servo Co., Ltd.
  • Electric axial flow fan
    Patent number: 7946824
    Abstract: In an axial flow fan, a line extending from a center axis and passing a corner where a following edge and a radially outer edge of a blade of an impeller meet is arranged forwardly in a rotational direction from an another corner where a leading edge of the blade and a radially outer surface of a hub meet. Furthermore, a camber ratio of the blade, which is minimum at a joint with the hub across the blade, monotonically increases to be maximum at the radially outer edge of the blade.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: May 24, 2011
    Assignee: Nidec Servo Co., Ltd.
    Inventors: Taku Iwase, Masanori Watabe, Osamu Sekiguchi, Tetsuya Hioki, Taro Tanno, Motoi Jin, Yoshihiko Kato