Patents by Inventor Tetsuzo Igata

Tetsuzo Igata 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).

  • Patent number: 5079964
    Abstract: The actuator for a door locking apparatus for a vehicle has an output shaft rotatably mounted on the body thereof, a cylindrical worm designed to be rotated by a motor, and a shaft tube having an internal toothed portion that is brought into mesh engagement with the cylindrical worm and designed to move between locked and unlocked positions along the axial direction of the worm when the worm is rotated. An elongate hole is formed in the arm fixed to the output shaft, and the pin of the shaft tube is brought into engagement with this elongate hole. A projection is provided on the shaft tube at such a position as to be closer to the output shaft than the pin is. The actuator has a torsion spring for returning the shaft tube from the locked or the unlocked position to a neutral position as an intermediate position between the two positions when the motor is switched off.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: January 14, 1992
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventors: Yoshikazu Hamada, Tetsuzo Igata
  • Patent number: 4971373
    Abstract: A noise suppressing device in a lock device for a vehicle, including a body to be fixed to a door of the vehicle; a latch rotatably supported in the body and adapted to be rotated by engagement with a striker fixed to a vehicle body; a ratchet rotatably supported in the body and adapted to engage a full-latch stepped portion of the latch and thereby prevent reverse rotation of the latch; first and second spring members for biasing the ratchet to engage the same with the latch; and an open lever for releasing engagement of the ratchet with the full-latch stepped portion; wherein the first spring member normally biases the ratchet to engage the same with the latch, and the second spring member does not bias the ratchet under a full-latch condition where the ratchet is engaged with the full-latch stepped portion of the latch, while when the ratchet is rotated in a releasing direction, the second spring member biases the ratchet.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: November 20, 1990
    Assignee: Mitsui Kinzoku Kogyo Kabushiki Kaisha
    Inventors: Yoshikazu Hamada, Tetsuzo Igata, Atsuo Suzuki, Makoto Sakamoto