Patents by Inventor Yoso Akehi

Yoso Akehi 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).

  • Headrest lock structure with lock slots, method for forming lock slots in headrest pole and method for producing headrest pole
    Patent number: 7121626
    Abstract: A headrest lock structure has a plurality of lock slots formed in a line along the axial direction of a cross-sectionally circular headrest pole and a lock plate is adapted to fit into one of the lock slots. Each lock slot has a bottom surface protruding in an arc within a region concaved from the outer peripheral surface of the headrest pole by a given distance, and a side surface formed on at least one of the sides of the bottom surface in the axial direction of the headrest pole to extend at approximately a right angle with the bottom surface. The lock plate has an arc-shaped concave portion corresponding to the profile of the bottom surface of each lock slot, and a flat portion corresponding to the side surface of each lock slot. The headrest lock structure can reliably prevent unintentional release of headrest lock.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: October 17, 2006
    Assignee: Delta Kogyo Co., Ltd.
    Inventors: Yoso Akehi, Hiroyuki Ishikawa, Ryoji Matsukawa
  • Headrest lock structure with lock slots, method for forming lock slots in headrest pole and method for producing headrest pole
    Publication number: 20050082893
    Abstract: A headrest lock structure has a plurality of lock slots formed in a line along the axial direction of a cross-sectionally circular headrest pole and a lock plate is adapted to fit into one of the lock slots. Each lock slot has a bottom surface protruding in an arc within a region concaved from the outer peripheral surface of the headrest pole by a given distance, and a side surface formed on at least one of the sides of the bottom surface in the axial direction of the headrest pole to extend at approximately a right angle with the bottom surface. The lock plate has an arc-shaped concave portion corresponding to the profile of the bottom surface of each lock slot, and a flat portion corresponding to the side surface of each lock slot. The headrest lock structure can reliably prevent unintentional release of headrest lock.
    Type: Application
    Filed: October 12, 2004
    Publication date: April 21, 2005
    Applicant: Delta Kogyo Co., Ltd.
    Inventors: Yoso Akehi, Hiroyuki Ishikawa, Ryoji Matsukawa