Patents by Inventor Hirotsugu Oga

Hirotsugu Oga 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).

  • Starting device of engine
    Patent number: 7597079
    Abstract: In a starting device of an engine, a starter clutch is provided with an outer race that rotates with a rotor (starter member), and a cam interposed between the outer race and a starter gear. A through hole is formed in the rotor so as to face the outer race axially. A stepped section is provided between a radially outer portion of the outer race, the portion facing a radially outer edge of the through hole, and a radially inner portion of the outer race. The stepped section causes the radially outer portion to be thinner than the radially inner portion. The starting device is capable of ensuring a cooling capability of a stator coil even though the rigidity of the outer race is increased.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 6, 2009
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Hirotsugu Oga, Mamoru Atsuumi
  • STARTING DEVICE OF ENGINE
    Publication number: 20070266982
    Abstract: In a starting device of an engine, a starter clutch is provided with an outer race that rotates with a rotor (starter member), and a cam interposed between the outer race and a starter gear. A through hole is formed in the rotor so as to face the outer race axially. A stepped section is provided between a radially outer portion of the outer race, the portion facing a radially outer edge of the through hole, and a radially inner portion of the outer race. The stepped section causes the radially outer portion to be thinner than the radially inner portion. The starting device is capable of ensuring a cooling capability of a stator coil even though the rigidity of the outer race is increased.
    Type: Application
    Filed: May 10, 2007
    Publication date: November 22, 2007
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Hirotsugu OGA, Mamoru ATSUUMI