Patents by Inventor Natsuko Hirayanagi

Natsuko Hirayanagi 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).

  • Roll forming system for forming flanges in strip material
    Patent number: 6928847
    Abstract: A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: August 16, 2005
    Assignee: Calsonic Kansei Corporation
    Inventors: Tomoaki Akutsu, Natsuko Hirayanagi, Harumi Obata
  • Formed strip and roll forming
    Patent number: 6539628
    Abstract: A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: April 1, 2003
    Assignee: Calsonic Kansei Corporation
    Inventors: Tomoaki Akutsu, Natsuko Hirayanagi, Harumi Obata
  • Formed strip and roll forming
    Publication number: 20020134126
    Abstract: A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.
    Type: Application
    Filed: May 8, 2002
    Publication date: September 26, 2002
    Applicant: CALSONIC KANSEI CORPORATION
    Inventors: Tomoaki Akutsu, Natsuko Hirayanagi, Harumi Obata
  • Formed strip and roll forming
    Publication number: 20020136918
    Abstract: A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.
    Type: Application
    Filed: May 8, 2002
    Publication date: September 26, 2002
    Applicant: CALSONIC KANSEI CORPORATION
    Inventors: Tomoaki Akutsu, Natsuko Hirayanagi, Harumi Obata
  • Formed strip and roll forming
    Patent number: 6423423
    Abstract: A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: July 23, 2002
    Assignee: Calsonic Kansei Corporation
    Inventors: Tomoaki Akutsu, Natsuko Hirayanagi, Harumi Obata
  • FORMED STRIP AND ROLL FORMING
    Publication number: 20010053457
    Abstract: A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.
    Type: Application
    Filed: October 8, 1999
    Publication date: December 20, 2001
    Inventors: TOMOAKI AKUTSU, NATSUKO HIRAYANAGI, HARUMI OBATA