Patents by Inventor Kenji Tsukuta

Kenji Tsukuta 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).

  • High-temperature gas blower impeller with vanes made of dispersion-strengthened alloy, gas blower using such impeller, and gas circulating furnace equipped with such gas blower
    Patent number: 5480299
    Abstract: An impeller for a high-temperature gas blower suitable for a floating conveyor furnace, having vanes each formed of a dispersion-strengthened alloy which includes as a disperse or internal phase 0.1-2.0% by weight of finely divided particles of an oxide of a high melting-point metal, such as Y.sub.2 O.sub.3, Ce.sub.2 O.sub.3, ZrO.sub.2, Al.sub.2 O.sub.3 and Gd.sub.2 O.sub.3, preferably dispersed in an austenite matrix or external phase of Cr, Fe, Al, Ti and Ni. A gas blower having such impeller, and a furnace using such gas blower are also disclosed.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: January 2, 1996
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Yoshitada Motomura, Hiroshi Tawara, Kenji Tsukuta, Tomohito Iikubo
  • High-temperature gas blower impeller with vanes made of dispersion-strengthened alloy, gas blower using such impeller, and gas circulating furnace equipped with such gas blower
    Patent number: 5372499
    Abstract: An impeller for a high-temperature gas blower suitable for a floating conveyor furnace, having vanes each formed of a dispersion-strengthened alloy which includes as a disperse or internal phase 0.1-2.0% by weight of finely divided particles of an oxide of a high melting-point metal, such as Y.sub.2 O.sub.3, Ce.sub.2 O.sub.3, ZrO.sub.2, Al.sub.2 O.sub.3 and Cd.sub.2 O.sub.3, preferably dispersed in an austenite matrix or external phase of Cr, Fe, Al, Ti and Ni. A gas blower having such impeller, and a furnace using such gas blower are also disclosed.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: December 13, 1994
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Yoshitada Motomura, Hiroshi Tawara, Kenji Tsukuta, Tomohito Iikubo
  • Skid rail alloy
    Patent number: 5226980
    Abstract: A novel oxide-dispersion strengthened type heat-resistant alloy is provided for use of preparing furnace members such as a skid rail. The alloy consists essentially of up to about 0.2% C+N, up to about 2.0% Si, up to about 2.0% Mn, about 15 to 35% Ni and about 0.2 to 4% Ta, and the balance of Fe, and contains about 0.1-2% of fine particles of high melting point metal oxide such as Y.sub.2 O.sub.3 dispersed in the austenite matrix.The alloy exhibits excellent properties of anti-hot deformation, oxidation resistance, abrasion resistance and thermal shock resistance.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: July 13, 1993
    Assignees: Diado Tokushuko Kabushiki Kaisha, Inco Alloys International, Inc.
    Inventors: Kenji Tsukuta, Tomohito Iikubo
  • Oxide-dispersion-strengthened niobum-based alloys and process for preparing
    Patent number: 5180446
    Abstract: Improvement of Nb-alloys, which are known as heat-resistant alloys, by giving anti-oxidation property thereto and increasing the high temperature strength thereof. In addition to a determined amount of Al, one of (1) suitable amounts of Ti, Cr and V, and (2) suitable amounts of Cr and Co, are added to Nb-matrix, and a high melting temperature metal oxide such as Y.sub.2 O.sub.3 or Al.sub.2 O.sub.3 is dispersed in the matrix. Preferable method of preparing the alloys is combination of mechanical alloying and subsequent hot processing.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: January 19, 1993
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Kenji Tsukuta, Tomohito Iikubo