Patents by Inventor Yoshinobu Oyabu

Yoshinobu Oyabu 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).

  • Key cylinder and method for assembling a key cylinder
    Patent number: 6837083
    Abstract: A key cylinder selectively locks and unlocks a lock mechanism. The key cylinder has a rotor and a lever. The rotor is rotated by a key. The lever connects the rotor to the lock mechanism. The key cylinder has a recess formed in an end of the rotor. An end portion of the lever fits in the recess. A cushion is located between the basal end of the lever and the recess. The cushion holds the lever such that an axis of the lever and an axis of the rotor forms an angle within a predetermined range of angles.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: January 4, 2005
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Toshiharu Katagiri, Naokatsu Okamura, Yoshinobu Oyabu
  • Key cylinder and method for assembling a key cylinder
    Publication number: 20020073754
    Abstract: A key cylinder selectively locks and unlocks a lock mechanism. The key cylinder has a rotor and a lever. The rotor is rotated by a key. The lever connects the rotor to the lock mechanism. The key cylinder has a recess formed in an end of the rotor. An end portion of the lever fits in the recess. A cushion is located between the basal end of the lever and the recess. The cushion holds the lever such that an axis of the lever and an axis of the rotor forms an angle within a predetermined range of angles.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 20, 2002
    Inventors: Toshiharu Katagiri, Naokatsu Okamura, Yoshinobu Oyabu
  • Cylinder lock
    Patent number: 5577409
    Abstract: When a key other than a regular key or the like is inserted to forcibly rotate a key rotor, a coupling member is moved in a direction indicated by an arrow by an uncoupling mechanism. This movement uncouples a rear rotor from the coupling member. As a result, the key rotor and a sleeve only rotate idly, and the rear rotor and a lock lever are not rotated. Hence, a cylinder lock is not unlocked, and no damaging force is never applied to components of the cylinder lock such as tumblers.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: November 26, 1996
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Yoshinobu Oyabu, Shozo Kito