Patents by Inventor Toshimasa Hiraoka

Toshimasa Hiraoka 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).

  • MULTIBLADE IMPELLER
    Publication number: 20120294726
    Abstract: The multiblade impeller of the present invention comprises a main plate, a side plate having a suction port at a center thereof, and a large number of blades provided between the main plate and the side plate and extend in the radial direction in an arc form. The main plate and the side plate each have a large number of ridge portions, each extending in the radial direction in an arc form so as to coincide with the shape of the blade extending in the radial direction in an arc form. End portions of the blades are inserted in grooves formed inside the ridge portions of the main plate and the side plate and are fixed to the ridge portions by being bent.
    Type: Application
    Filed: July 30, 2012
    Publication date: November 22, 2012
    Inventors: Kensuke Kuroki, Tatsunori Nishihara, Kouji Wada, Hideharu Tanaka, Toshimasa Hiraoka, Tsuyoshi Morii
  • Multiblade impeller
    Patent number: 8257043
    Abstract: The multiblade impeller of the present invention comprises a main plate, a side plate having a suction port at a center thereof, and a large number of blades provided between the main plate and the side plate and extend in the radial direction in an arc form. The main plate and the side plate each have a large number of ridge portions, each extending in the radial direction in an arc form so as to coincide with the shape of the blade extending in the radial direction in an arc form. End portions of the blades are inserted in grooves formed inside the ridge portions of the main plate and the side plate and are fixed to the ridge portions by being bent.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: September 4, 2012
    Assignees: Hitachi Industrial Equipment Systems Co., Ltd., Koshin Industries Co., Ltd.
    Inventors: Kensuke Kuroki, Tatsunori Nishihara, Kouji Wada, Hideharu Tanaka, Toshimasa Hiraoka, Tsuyoshi Morii
  • MULTIBLADE IMPELLER
    Publication number: 20080089784
    Abstract: The multiblade impeller of the present invention comprises a main plate, a side plate having a suction port at a center thereof, and a large number of blades provided between the main plate and the side plate and extend in the radial direction in an arc form. The main plate and the side plate each have a large number of ridge portions, each extending in the radial direction in an arc form so as to coincide with the shape of the blade extending in the radial direction in an arc form. End portions of the blades are inserted in grooves formed inside the ridge portions of the main plate and the side plate and are fixed to the ridge portions by being bent.
    Type: Application
    Filed: June 4, 2007
    Publication date: April 17, 2008
    Inventors: Kensuke Kuroki, Tatsunori Nishihara, Kouji Wada, Hideharu Tanaka, Toshimasa Hiraoka, Tsuyoshi Morii