Patents by Inventor Masaharu Sekino

Masaharu Sekino 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 clamping rails for pressure welding the same and clamping apparatus therefor
    Patent number: 4753424
    Abstract: When forcing together the mating end faces of a pair of rails into contact and pressure welding the rails, the clamping operation of each rails end is effected by dividing it into a vertical positioning clamping and a lateral positioning clamping performed independently of the former. With the contacting end faces being interposed, each of the two rail ends is first forced upward at the chins of each rail below the head thereof to press the upper surface of each rail against the lower surface of a leveler which establishes a preliminarily adjusted reference level. Then, each of the rail ends is clamped by a pair of clamping means which are pressed against the sides of the web of the rail from both sides.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: June 28, 1988
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Yukihiko Sato, Eiji Morishige, Saburo Mori, Masaharu Sekino, Akio Mitsui