Patents by Inventor Hiroji Tada

Hiroji Tada 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: 8128339
    Abstract: To provide a bearing support structure and a gas turbine that prevent damage of device induced by a rotor shaft when the rotor shaft is unbalanced, the bearing support structure and the gas turbine includes: a casing (7) formed in a cylindrical shape; a bearing unit (8) formed in a cylindrical shape and housed in the casing (7); a rotation shaft (5) rotatably supported by the bearing unit (8); and a reaction-force decreasing unit (13) that connects the casing and the bearing unit, and is configured to decrease a radial reaction force on the bearing unit side.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: March 6, 2012
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Mitsuru Kondo, Hiroji Tada, Osamu Morii, Tadayuki Hanada, Hirokazu Hagiwara, Kunihiro Shimizu, Tomohiro Imae
  • Publication number: 20090246018
    Abstract: To provide a bearing support structure and a gas turbine that prevent damage of device induced by a rotor shaft when the rotor shaft is unbalanced, the bearing support structure and the gas turbine includes: a casing (7) formed in a cylindrical shape; a bearing unit (8) formed in a cylindrical shape and housed in the casing (7); a rotation shaft (5) rotatably supported by the bearing unit (8); and a reaction-force decreasing unit (13) that connects the casing and the bearing unit, and is configured to decrease a radial reaction force on the bearing unit side.
    Type: Application
    Filed: July 11, 2007
    Publication date: October 1, 2009
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Mitsuru Kondo, Hiroji Tada, Osamu Morii, Tadayuki Hanada, Hirokazu Hagiwara, Kunihiro Shimizu, Tomohiro Imae
  • Patent number: 6050776
    Abstract: A gas turbine stationary blade unit in which two stationary blades are formed in a single segment by divided shrouds functions to lessen the occurrence of cracks. Two stationary blades 1a, 1b are fixed to an outer shroud and an inner shroud, respectively. Each shroud is divided into two sections 2a, 2b and 3a, 3b. Flanges 4a, 4b are provided to connect the section together by bolts via boltholes 7. Likewise, flanges 5a, 5b are provided to form a similar connection or joint. If the two stationary blades 1a, 1b are fixed in a single segment by the shrouds which are not divided, a restraining force becomes larger, local stress occurs due to thermal stress and the frequency of crack occurrence increases. However, since the shrouds are divided respectively into two parts and jointed together by bolts, the crack occurrence is lessened. Also, pinholes are provided in opposing faces at the divided portion of the shrouds.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: April 18, 2000
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Koichi Akagi, Yukihiro Hashimoto, Masahito Kataoka, Yasuoki Tomita, Hiroji Tada
  • Patent number: 5947687
    Abstract: A movable gas turbine blade includes a platform (10) which is provided with a groove (15). The groove is located on a blade trailing side of the platform. Also, the groove is rounded and has a depth which does not enter a stress line of the platform caused by a load on the blade. The groove functions to suppress a high thermal stress arising at a connection portion of a blade trailing edge and the platform of the gas turbine air cooled moving blade during unsteady (start and stop) operation of the turbine.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: September 7, 1999
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masahiko Mori, Yukihiro Hashimoto, Hiroji Tada, Ichiro Fukue, Keizo Tsukagoshi, Jyunichiro Masada
  • Patent number: 4345686
    Abstract: A material for fixing an anchor bolt or the like, which is used, in case of inserting and planting an anchor bolt in a planting hole bored in a concrete foundation or base rock, for filling the gap between the planting hole and the anchor bolt to couple the both, in which paste-like base material and hardener for cold-setting resin requiring hardener are filled separately in long glass tubes together with artificial solid ball-like aggregates, and a plurality of pairs of them are arranged in a hollow tubular structure and adhered mutually with adhesive, and a method of manufacturing the same.
    Type: Grant
    Filed: April 16, 1980
    Date of Patent: August 24, 1982
    Inventors: Takeshi Sato, Hiroji Tada, Yoshiichi Yano
  • Patent number: 4198793
    Abstract: The method of affixing a bolt in a hole in foundations formed of materials such as concrete, stone or rock, wood and the like which includes inserting a bolt in said hole, filling the space surrounding said bolt with a plurality of balls, pouring a liquid curable resin into the hole to fill the interstices between the balls and then curing the resin and the resulting structure.
    Type: Grant
    Filed: August 15, 1978
    Date of Patent: April 22, 1980
    Assignee: Nippon Jikkou Kabushiki Kaisha
    Inventors: Takeshi Sato, Isao Sakamoto, Katsuaki Okamoto, Hiroji Tada