Patents by Inventor Yoshiya Tsukada

Yoshiya Tsukada 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).

  • Cold roll forming method for reducing a diameter of a metal pipe, and a metal pipe product having its diameter reduced by such method
    Publication number: 20090199924
    Abstract: A cold roll forming method for reducing a diameter of a metal pipe and a metal pipe product having a diameter reduced by such a method are disclosed, wherein the method includes: passing a raw metal pipe through a set of pre-forming rolls so that it can be pre-formed into an intermediate metal pipe having an elliptical, elongated circular or rectangular cross-sectional shape; and then passing the intermediate metal pipe through a set of diameter-reducing rolls disposed on a downstream side of the set of pre-forming rolls so that it can have its outer circumferential length reduced to be smaller than an outer peripheral length of the raw metal pipe, while at the same time being re-formed into a circular cross-sectional shape or any other cross-sectional shape different from the cross-sectional shape of the intermediate metal pipe.
    Type: Application
    Filed: December 17, 2008
    Publication date: August 13, 2009
    Inventors: Tsuyoshi Ishikawa, Yoshiya Tsukada, Ryoichi Suzuki, Akihiro Ishikawa, Motoyoshi Ishikawa, Jun Ishikawa
  • Cold roll forming method for reducing a diameter of a metal pipe, and a metal pipe product having its diameter reduced by such method
    Publication number: 20080148797
    Abstract: A cold roll forming method for reducing a diameter of a metal pipe and a metal pipe product having a diameter reduced by such a method are disclosed, wherein the method includes: passing a raw metal pipe through a set of pre-forming rolls so that it can be pre-formed into an intermediate metal pipe having an elliptical, elongated circular or rectangular cross-sectional shape; and then passing the intermediate metal pipe through a set of diameter-reducing rolls disposed on a downstream side of the set of pre-forming rolls so that it can have its outer circumferential length reduced to be smaller than an outer peripheral length of the raw metal pipe, while at the same time being re-formed into a circular cross-sectional shape or any other cross-sectional shape different from the cross-sectional shape of the intermediate metal pipe.
    Type: Application
    Filed: December 21, 2007
    Publication date: June 26, 2008
    Inventors: Tsuyoshi Ishikawa, Yoshiya Tsukada, Ryoichi Suzuki, Akihiro Ishikawa, Motoyoshi Ishikawa, Jun Ishikawa
  • Cold roll forming method for reducing a diameter of a metal pipe, and a metal pipe product having its diameter reduced by such method
    Publication number: 20070113611
    Abstract: A cold roll forming method for reducing a diameter of a metal pipe and a metal pipe product having a diameter reduced by such a method are disclosed, wherein the method includes: passing a raw metal pipe through a set of pre-forming rolls so that it can be pre-formed into an intermediate metal pipe having an elliptical, elongated circular or rectangular cross-sectional shape; and then passing the intermediate metal pipe through a set of diameter-reducing rolls disposed on a downstream side of the set of pre-forming rolls so that it can have its outer circumferential length reduced to be smaller than an outer peripheral length of the raw metal pipe, while at the same time being re-formed into a circular cross-sectional shape or any other cross-sectional shape different from the cross-sectional shape of the intermediate metal pipe.
    Type: Application
    Filed: January 8, 2007
    Publication date: May 24, 2007
    Inventors: Tsuyoshi Ishikawa, Yoshiya Tsukada, Ryoichi Suzuki, Akihiro Ishikawa, Motoyoshi Ishikawa, Jun Ishikawa
  • Cold roll forming method for reducing a diameter of a metal pipe, and a metal pipe product having its diameter reduced by such method
    Publication number: 20060201223
    Abstract: A cold roll forming method for reducing a diameter of a metal pipe and a metal pipe product having a diameter reduced by such a method are disclosed, wherein the method includes: passing a raw metal pipe through a set of pre-forming rolls so that it can be pre-formed into an intermediate metal pipe having an elliptical, elongated circular or rectangular cross-sectional shape; and then passing the intermediate metal pipe through a set of diameter-reducing rolls disposed on a downstream side of the set of pre-forming rolls so that it can have its outer circumferential length reduced to be smaller than an outer peripheral length of the raw metal pipe, while at the same time being re-formed into a circular cross-sectional shape or any other cross-sectional shape different from the cross-sectional shape of the intermediate metal pipe.
    Type: Application
    Filed: May 17, 2006
    Publication date: September 14, 2006
    Inventors: Tsuyoshi Ishikawa, Yoshiya Tsukada, Ryoichi Suzuki, Akihiro Ishikawa, Motoyoshi Ishikawa, Jun Ishikawa