Patents by Inventor Katsuji Shoji

Katsuji Shoji 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).

  • Self-locking reduction device
    Publication number: 20040041137
    Abstract: A self-locking reduction device used in a winch has a support to which an input shaft is rotatably mounted. The input shaft has an eccentric shaft portion. Three pins are formed at regular intervals on a circumference around the center of the eccentric shaft portion on an external gear that is mounted to the eccentric shaft portion. Three bores are formed at regular intervals on the support facing the external gear on a circumference around the center of the input shaft. The pins are engaged with the bores so that the external gear may be eccentrically moved. The number of internal teeth of the internal gear is slightly more than that of the external teeth of the external gear, thereby providing a reliable self-locking reduction device. Metal-to-metal contact between the input shaft and the wall of a surrounding bore provides a braking force for self-locking of the drive mechanism.
    Type: Application
    Filed: September 3, 2003
    Publication date: March 4, 2004
    Inventor: Katsuji Shoji
  • Self-locking reduction device
    Patent number: 6659429
    Abstract: A self-locking reduction device used in a winch has a support to which an input shaft is rotatably mounted. The input shaft has an eccentric shaft portion. Three pins are formed at regular intervals on a circumference around the center of the eccentric shaft portion on an external gear that is mounted to the eccentric shaft portion. Three bores are formed at regular intervals on the support facing the external gear on a circumference around the center of the input shaft. The pins are engaged with the bores so that the external gear may be eccentrically moved. The number of internal teeth of the internal gear is slightly more than that of the external teeth of the external gear, thereby providing a reliable self-locking reduction device.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: December 9, 2003
    Inventor: Katsuji Shoji
  • Self-locking reduction device
    Publication number: 20030109348
    Abstract: A self-locking reduction device used in a winch has a support to which an input shaft is rotatably mounted. The input shaft has an eccentric shaft portion. Three pins are formed at regular intervals on a circumference around the center of the eccentric shaft portion on an external gear that is mounted to the eccentric shaft portion. Three bores are formed at regular intervals on the support facing the external gear on a circumference around the center of the input shaft. The pins are engaged with the bores so that the external gear may be eccentrically moved. The number of internal teeth of the internal gear is slightly more than that of the external teeth of the external gear, thereby providing a reliable self-locking reduction device.
    Type: Application
    Filed: December 12, 2001
    Publication date: June 12, 2003
    Inventor: Katsuji Shoji