Patents by Inventor Tooru Egoshi

Tooru Egoshi 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).

  • Method of manufacturing a seamless pipe
    Patent number: 7174761
    Abstract: When manufacturing a seamless pipe by carrying out elongation rolling and sizing on a mother tube for forming a seamless pipe, the occurrence of portions of thickness variation in the seamless pipe is suppressed by previously identifying the portions of wall thickness variation where the thickness varies in the circumferential direction of the seamless pipe, and carrying out elongation rolling so that the thickness of the portions of the mother tube corresponding to the portions of wall thickness variation of the seamless pipe are different in thickness at the completion of elongation rolling from that of other portions of the mother tube. As a result, local variations in wall thickness in the circumferential direction of a seamless pipe are prevented.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: February 13, 2007
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Hiroyuki Iwamoto, Akihito Yamane, Tooru Egoshi, Kenichi Sasaki
  • Method of manufacturing a seamless pipe
    Publication number: 20060059969
    Abstract: When manufacturing a seamless pipe by carrying out elongation rolling and sizing on a mother tube for forming a seamless pipe, the occurrence of portions of thickness variation in the seamless pipe is suppressed by previously identifying the portions of wall thickness variation where the thickness varies in the circumferential direction of the seamless pipe, and carrying out elongation rolling so that the thickness of the portions of the mother tube corresponding to the portions of wall thickness variation of the seamless pipe are different in thickness at the completion of elongation rolling from that of other portions of the mother tube. As a result, local variations in wall thickness in the circumferential direction of a seamless pipe are prevented.
    Type: Application
    Filed: September 23, 2005
    Publication date: March 23, 2006
    Inventors: Hiroyuki Iwamoto, Akihito Yamane, Tooru Egoshi, Kenichi Sasaki