Patents by Inventor Yoshihiro Fujii

Yoshihiro Fujii 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: 4197495
    Abstract: A furnace operation system, comprising, a plurality of hollow tubes arranged in place at a position lower than the raw material charging level in the furnace, and running through the body of the furnace, said hollow tubes being arranged in place into a multi-stage shape; a plurality of magnetic sensors arranged for each and every one of a designated number of measuring points selected in a manner of corresponding to the hollow tubes in the vertical direction, within the interior of the plurality of hollow tubes; and a means electrically connected with the plurality of magnetic sensors, which conducts processing of said signals from the said magnetic sensors which are obtained in correspondence to the downward movement of the charge fed into the furnace.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: April 8, 1980
    Assignee: Nippon Steel Corporation
    Inventors: Masaaki Matsui, Kenji Tamura, Yooichi Hayashi, Yoshihiro Fujii, Yoshikatu Sigematu
  • Patent number: 4123707
    Abstract: A magnetic field sensor housed in a cooling device has an inner core body for measuring the behavior of a charge put in a shaft furnace, an inner casing for accommodating the inner core body therein, and an outer casing for accommodating the inner casing with a space for a circulating path of cooling medium therebetween. The inner core body consists of an exciter for exciting the charge put in the furnace, a magnetic field sensing member arranged in front of the exciter for detecting the exciting magnetic field generated from the exciter and a driving circuit arranged at the rear of the exciter for driving the sensing member.
    Type: Grant
    Filed: November 9, 1976
    Date of Patent: October 31, 1978
    Assignees: Nippon Steel Corporation, Mishima Kosan Co., Ltd.
    Inventors: Yoshihiro Fujii, Taketoshi Moriyama, Yoshikatsu Shigematsu, Shinjiro Takeuchi, Toshiro Kikuchi, Makio Taguchi, Satoshi Ichioka
  • Patent number: 4122392
    Abstract: A system of detecting a change in the charge put in a metallurgical furnace or the like wherein an magnetic field generator and a magnetic sensing section of a magnetometer arranged along the central axis of the exciting magnetic field of the said magnetic field generator are fitted in place on and/or inserted into a hole of the wall of such a vessel, including a metallurgical furnace or the like, as is enclosed with the said wall, such a change in the exciting magnetic flux passing through the said magnetic sensing section as is given birth by the movement of the charge is picked up in the form of electrical signals, and, the movement, the velocity, the rate of travel, the thickness of the layer, fluctuations in the shape of the layer, the circumferential distribution, the classification, and so forth, of the said charge are enabled to be properly detected in an optional manner through corresponding changes in the said electrical signals.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: October 24, 1978
    Assignees: Nippon Steel Corporation, Mishima Kosan Co. Ltd.
    Inventors: Shinjiro Takeuchi, Tosiro Kikuchi, Koosuke Harada, Tokuji Shokyu, Yoshihiro Fujii