Patents by Inventor Tatsu Fujita

Tatsu Fujita 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 strength steel rod of large gauge
    Patent number: 4123296
    Abstract: A large gauge high strength steel rod having a diameter of not less than 9 mm, is produced from high carbon steel containing, by weight percent, from 0.65 to 0.90% carbon and from 0.15 to 1.5% chromium capable of being drawn without subsequent heat treatment.
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: October 31, 1978
    Assignee: Kobe Steel, Ltd.
    Inventors: Noboru Yamakoshi, Tsugio Kaneda, Nobuyasu Hatsuoka, Shinichi Shimazu, Tatsu Fujita, Yoshiro Yamada, Tetsuo Yamada, Atsuo Mizuta
  • Method of producing large diameter steel rods
    Patent number: 4046600
    Abstract: A large gauge high strength steel rod having a diameter of not less than 9 mm, is produced from high carbon steel containing, by weight percent, from 0.65 to 0.90% carbon and from 0.15 to 1.5% chromium capable of being drawn without subsequent heat treatment.
    Type: Grant
    Filed: December 17, 1974
    Date of Patent: September 6, 1977
    Assignee: Kobe Steel Ltd.
    Inventors: Noboru Yamakoshi, Tsugio Kaneda, Nobuyasu Hatsuoka, Shinichi Shimazu, Tatsu Fujita, Yoshiro Yamada, Tetsuo Yamada, Atsuo Mizuta
  • Method and apparatus for cooling hot rolled rod
    Patent number: 4023392
    Abstract: A method and apparatus for cooling a rod of a coil form, immediately after the hot-rolling thereof and within which the rod, whose loops are spaced a given pitch from one another, is laid flat upon a chain conveyor, and more particularly upon rails thereof, and transported therealong by means of endless chains, includes the cooling of the rod with cooling fluid or air which is introduced from below the cooling floors through means of nozzle portions formed within the bodies of the cooling floors. The method and apparatus features the arrangement and construction, including the configuration, of the nozzle portions thus formed, the cooling fluid being projected upwardly at an angle within the range of 10.degree.-70.degree. with respect to the plane of the cooling bed, and horizontally at an angle within the range of 10.degree.-150.degree.
    Type: Grant
    Filed: January 19, 1976
    Date of Patent: May 17, 1977
    Assignee: Kobe Steel Ltd.
    Inventors: Tatsu Fujita, Yoshiro Yamada, Atsuo Mizuta, Tetsuo Yamada, Osamu Tsuda, Tsugio Kaneda, Shinichi Shimazu, Yukio Wada
  • Method of cooling steel wire
    Patent number: 3973426
    Abstract: A method for cooling a steel wire which is being drawn in a dry lubricant wire drawing operation wherein the rear portion of the die, including the backrelief portion thereof and the wire which has just been drawn to the desired dimension, are brought into direct contact with a cooling medium so as to effect forced cooling thereof, the wire thereby being cooled before the commencement of strain-aging embrittlement within the wire.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: August 10, 1976
    Assignee: Kobe Steel Limited
    Inventors: Tatsu Fujita, Heijiro Kawakami, Yoshiro Yamada, Tetsuo Yamada
  • Method of manufacturing compound billets for hydrostatic extrusion
    Patent number: 3937385
    Abstract: In the manufacture of compound billets composed of two or more different metals for use in hydrostatic extrusion, care must be exercised to see whether or not products possessing a predetermined compound status are produced from the compound billets by means of the hydrostatic extrusion process.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: February 10, 1976
    Assignee: Kobe Steel Ltd.
    Inventors: Tsunesaburo Asada, Takefumi Horiuchi, Kiyoshi Matsumoto, Yoshiyuki Monju, Yoshihiro Yamaguchi, Masataka Noguti, Masao Nishihara, Tatsu Fujita, Tomiharu Matsushita