Patents by Inventor Naoyuki Sawai

Naoyuki Sawai 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).

  • Plastic working method and apparatus
    Patent number: 5007281
    Abstract: Plastic working method and apparatus are disclosed. The plastic work such as forging is carried out by partial pressing contact of a die with a partial portion of a workpiece. The die is moved in a swinging or circular rocking fashion. The plastic working apparatus comprises a lower die for supporting the workpiece; an upper die swingably provided in a swinging plane about a predetermined position for relatively depressing the workpiece with respect to the lower die in accordance with the swing motion and for performing the plastic work to the workpiece in cooperation with the lower die; and a moving mechanism for relatively moving the workpiece and the upper die within the swing plane during the working operation.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: April 16, 1991
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Syozo Aoshima, Kunio Hirota, Hiroshi Sakakibara, Naoyuki Sawai, Takeaki Sato
  • Plastic working method and apparatus
    Patent number: 4936125
    Abstract: Plastic working method and apparatus are disclosed. The plastic work such as forging is carried out by partial pressing contact of a die with a partial portion of a workpiece. The die is moved in a swinging or circular rocking fashion. The plastic working apparatus comprises a lower die for supporting the workpiece; an upper die swingably provided in a swinging plane about a predetermined position for relatively depressing the workpiece with respect to the lower die in accordance with the swing motion and for performing the plastic work to the workpiece in cooperation with the lower die; and a moving mechanism for relatively moving the workpiece and the upper die within the swing plane during the working operation.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: June 26, 1990
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Syozo Aoshima, Kunio Hirota, Hiroshi Sakakibara, Naoyuki Sawai, Takeaki Sato