Patents by Inventor Zituo Suzuki

Zituo Suzuki 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).

  • Extrusion die for forming a honeycomb structure
    Patent number: 4381912
    Abstract: An extrusion die for forming a honeycomb structure comprises a die body provided with a plurality of disconnected feed passageways which are formed from the inlet face thereof, interconnected grid-shaped extrusion slots which are formed from the outlet face thereof so as to be communicated with said feed passageways, and an annular stepped portion formed in the outer peripheral portion of the outlet face thereof, and an annular die mask which covers the stepped portion of the die body below the outlet face of the central unstepped portion of the die body. And between the die mask and a dropped portion formed between the stepped portion and the unstepped portion of the die body, an annular opening portion which opens in the extruding direction is formed.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: May 3, 1983
    Assignee: Nippon Soken, Inc.
    Inventors: Shinichi Yamamoto, Mitsuru Asano, Zituo Suzuki, Toshihiko Ito
  • Extrusion device for producing honeycomb structures
    Patent number: 4368025
    Abstract: An extrusion device comprises a die provided with feed passageways and grid-shaped extrusion slots, and a die mask covering the peripheral portion of the die on the extrudable material outlet side. The die mask is provided with a plurality of disconnected openings which are formed in the lower end of the inner surface thereof at predetermined intervals so as to be communicated with the extrusion slots of the peripheral portion of the die. By this extrusion device, the extrudable material is supplied from the openings into the outer periphery of the extruded body to form a honeycomb structure having a smooth outer peripheral surface and a thick outer wall.
    Type: Grant
    Filed: January 21, 1981
    Date of Patent: January 11, 1983
    Assignee: Nippon Soken, Inc.
    Inventors: Junichiro Naito, Shinichi Yamamoto, Zituo Suzuki, Mitsuru Asano
  • Extrusion device for forming a honeycomb structure
    Patent number: 4362495
    Abstract: An extrusion device comprises a die provided with feed passageways and grid-shaped extrusion slots of which width is made larger in the outer peripheral portion compared with those of the central portion of the die. By the above extrusion device, a honeycomb structure having a thicker walled outer peripheral portion can be obtained without any distortion.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: December 7, 1982
    Assignee: Nippon Soken, Inc.
    Inventors: Junichiro Naito, Shinichi Yamamoto, Zituo Suzuki, Mitsuru Asano
  • Ceramic honeycomb structure
    Patent number: 4233351
    Abstract: A ceramic honeycomb structure is provided with a plurality of open passages extending therethrough in an axial direction thereof. The wall thickness of at least one part of the open passages formed in an annular portion along an outer peripheral surface of the structure is made larger than that of the other open passages formed in the other portion than the annular portion, and the structure has excellent mechanical strength and thermal shock strength.
    Type: Grant
    Filed: May 15, 1979
    Date of Patent: November 11, 1980
    Assignee: Nippon Soken, Inc.
    Inventors: Kazunari Okumura, Shinichi Yamamoto, Zituo Suzuki