Patents by Inventor Kouji Shirakawa

Kouji Shirakawa 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).

  • Control method of hydraulic pinch roll and control unit thereof
    Patent number: 6604663
    Abstract: A control unit of hydraulic pinch rolls 1 comprises: position detectors 10c, 10d that detect position of right and left cylinder pistons 6c; an arithmetical unit 13 that calculates a difference of output 16c, 16d from the position detectors; a controller 14 that processes a calculated value to make correction output; and add-subtract units 18c, 18d that add/subtract the correction output from the controller such that the correction output 17 is added to an end portion of the pinch rolls having a wider gap in a direction to push the gap and the correction output of the same amount is subtracted from the opposite end portion, by which the set values of pressing force control provided for right and left independently are corrected. Thus, a defective winding shape can be suppressed.
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: August 12, 2003
    Assignee: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Hiroaki Kuwano, Kouji Shirakawa
  • Control method of hydraulic pinch roll and control unit thereof
    Publication number: 20030034376
    Abstract: A control unit of hydraulic pinch rolls 1 comprises: position detectors 10c, 10d that detect position of right and left cylinder pistons 6c; an arithmetical unit 13 that calculates a difference of output 16c, 16d from the position detectors; a controller 14 that processes a calculated value to make correction output; and add-subtract units 18c, 18d that add/subtract the correction output from the controller such that the correction output 17 is added to an end portion of the pinch rolls having a wider gap in a direction to push the gap and the correction output of the same amount is subtracted from the opposite end portion, by which the set values of pressing force control provided for right and left independently are corrected. Thus, a defective winding shape can be suppressed.
    Type: Application
    Filed: August 17, 2001
    Publication date: February 20, 2003
    Applicant: Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Hiroaki Kuwano, Kouji Shirakawa