Patents by Inventor Takayuki Kurumi

Takayuki Kurumi 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).

  • Variable valve timing control device
    Patent number: 6920853
    Abstract: A variable valve timing control device includes a rotation member for opening or closing a valve, a rotation transmission member engaged with the rotation member to be relatively rotatable, a vane provided on either one of the rotation member or the rotation transmission member, a hydraulic chamber formed between the rotation member and the rotation transmission member and including an advance angle chamber and a retarded angle chamber, the advance angle chamber and the retarded angle chamber being formed by dividing the hydraulic chamber by the vane, a first hydraulic passage for supplying and discharging a fluid to the advance angle chamber, and a second hydraulic passage for supplying and discharging the fluid to the retarded angle chamber. The vane includes a surface hardness determined to be higher than a surface hardness of a sliding surface of the rotation member or the rotation transmission member for sliding the vane.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: July 26, 2005
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Shigeru Nakajima, Taiyu Iwata, Ichiro Hiratsuka, Takayuki Kurumi, Kazumi Ogawa
  • Variable valve timing control device
    Publication number: 20030221646
    Abstract: A variable valve timing control device includes a rotation member for opening or closing a valve, a rotation transmission member engaged with the rotation member to be relatively rotatable, a vane provided on either one of the rotation member or the rotation transmission member, a hydraulic chamber formed between the rotation member and the rotation transmission member and including an advance angle chamber and a retarded angle chamber, the advance angle chamber and the retarded angle chamber being formed by dividing the hydraulic chamber by the vane, a first hydraulic passage for supplying and discharging a fluid to the advance angle chamber, and a second hydraulic passage for supplying and discharging the fluid to the retarded angle chamber. The vane includes a surface hardness determined to be higher than a surface hardness of a sliding surface of the rotation member or the rotation transmission member for sliding the vane.
    Type: Application
    Filed: March 7, 2003
    Publication date: December 4, 2003
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Shigeru Nakajima, Taiyu Iwata, Ichiro Hiratsuka, Takayuki Kurumi, Kazumi Ogawa