Patents by Inventor Shigeki Hirakawa

Shigeki Hirakawa 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).

  • Range sensing apparatus
    Patent number: 9021907
    Abstract: A housing slidably guides a slider, which is driven in response to selection of a shift range of an automatic transmission. Upper and lateral sides of a movable range of the slider are covered with the housing. Thereby, application of hydraulic fluid and foreign objects to guide rails is limited to limit malfunction of the slider. Furthermore, even when the hydraulic fluid and foreign objects adhere to the guide rails, the hydraulic fluid and foreign objects can be collected at ends of the movable range of the slider and can be expelled to an outside of the housing through open ends of the housing.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: May 5, 2015
    Assignees: Denso Corporation, Mazda Motor Corporation
    Inventors: Akira Takagi, Mikio Kanefusa, Shigeki Hirakawa, Takahiro Kimura, Akihiro Mitani, Shotaro Nagai, Keiichiro Sueshige, Takenori Kawano
  • RANGE SENSING APPARATUS
    Publication number: 20120000309
    Abstract: A housing slidably guides a slider, which is driven in response to selection of a shift range of an automatic transmission. Upper and lateral sides of a movable range of the slider are covered with the housing. Thereby, application of hydraulic fluid and foreign objects to guide rails is limited to limit malfunction of the slider. Furthermore, even when the hydraulic fluid and foreign objects adhere to the guide rails, the hydraulic fluid and foreign objects can be collected at ends of the movable range of the slider and can be expelled to an outside of the housing through open ends of the housing.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 5, 2012
    Applicants: MAZDA MOTOR CORPORATION, DENSO CORPORATION
    Inventors: Akira Takagi, Mikio Kanefusa, Shigeki Hirakawa, Takahiro Kimura, Akihiro Mitani, Shotaro Nagai, Keiichiro Sueshige, Takenori Kawano