Patents by Inventor Yasunaka Hanaoka

Yasunaka Hanaoka 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).

  • Roots fluid machine with reduced gas leakage
    Patent number: 8936450
    Abstract: A roots type fluid machine includes a case having a side wall, a pair of rotary shafts provided in the case, a pair of rotors engaged with each other and fixed to the pair of rotary shafts so as to extend axially, respectively, a suction space formed by the case and the pair of rotors for introducing fluid, a discharge space formed by the case for discharging fluid and the pair of rotors and a transfer chamber formed by the case and the rotor. The rotor has a rotor end surface. A clearance is formed between the side wall and the rotor end surface. The transfer chamber transfers gas introduced in the suction space to the discharge space in accordance with the rotation of the pair of rotors. The case has a guide groove formed in the side wall facing the rotor end surface. Gas leaked from the discharge space into the clearance is introduced to the transfer chamber through the guide groove.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: January 20, 2015
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yuya Izawa, Shinya Yamamoto, Takashi Ban, Takayuki Imai, Katsumi Yamashita, Yasunaka Hanaoka
  • ROOTS TYPE FLUID MACHINE
    Publication number: 20120014825
    Abstract: A roots type fluid machine includes a case having a side wall, a pair of rotary shafts provided in the case, a pair of rotors engaged with each other and fixed to the pair of rotary shafts so as to extend axially, respectively, a suction space formed by the case and the pair of rotors for introducing fluid, a discharge space formed by the case for discharging fluid and the pair of rotors and a transfer chamber formed by the case and the rotor. The rotor has a rotor end surface. A clearance is formed between the side wall and the rotor end surface. The transfer chamber transfers gas introduced in the suction space to the discharge space in accordance with the rotation of the pair of rotors. The case has a guide groove formed in the side wall facing the rotor end surface. Gas leaked from the discharge space into the clearance is introduced to the transfer chamber through the guide groove.
    Type: Application
    Filed: July 12, 2011
    Publication date: January 19, 2012
    Applicant: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yuya Izawa, Shinya Yamamoto, Takashi Ban, Takayuki Imai, Katsumi Yamashita, Yasunaka Hanaoka