Patents by Inventor Makoto Tomita

Makoto Tomita 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).

  • High efficiency arc welding process and apparatus
    Patent number: 4095085
    Abstract: A high efficiency arc welding process and apparatus wherein an arc is generated between an electrode and plates to be welded, the welding electrode is oscillated, and the direction of the arc is oscillated by a magnetic force in synchronism with the oscillation of the welding electrode so that the arc is directed to the groove face of each plate to be welded.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: June 13, 1978
    Assignee: Kobe Steel, Limited
    Inventors: Makoto Tomita, Hisaaki Yokota, Syozi Koga, Toshisada Kashimura
  • Process for welding aluminum and aluminum alloys in horizontal welding position
    Patent number: 4037078
    Abstract: Aluminum and aluminum alloys are welded in a horizontal welding position in which the base metals to be welded are vertically disposed in abutting relationship with the welding groove opened sidewise by oscillating the tip of the welding electrode in the widthwise direction of the abutted base metals and welding the base metals while maintaining the angle formed by the surface of the molten pool and the electrode on the advancing side thereof greater than 90.degree.. The surface of the molten pool as used herein is defined as one which is parallel to the crater surface of the weld which results upon termination of welding by extinction of the welding arc.
    Type: Grant
    Filed: December 31, 1974
    Date of Patent: July 19, 1977
    Assignee: Kobe Steel Ltd.
    Inventors: Minoru Oishi, Naoki Okuda, Makoto Tomita, Toshisada Kashimura, Syozi Koga
  • Method of vertical welding of aluminum and aluminum alloys
    Patent number: 4029933
    Abstract: A method of vertical welding of aluminum and aluminum alloys comprising welding Al or an Al alloy while oscillating in a welding groove an electrode in a closed pattern corresponding substantially to the groove shape, wherein the welding is conducted by using a welding current higher by 10 to 150 A than the base welding current at least during the course of oscillation of the electrode along the groove face of one of the materials to be welded while the electrode is pursuing courses of oscillation along both groove faces of the materials to be welded.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: June 14, 1977
    Assignee: Kobe Steel Ltd.
    Inventors: Minoru Oishi, Naoki Okuda, Makoto Tomita, Nobumasa Ohkubo, Kazuo Kogane, Kazuo Yonezawa
  • Process for narrow gap welding of aluminum alloy thick plates
    Patent number: 4019018
    Abstract: The narrow gap butt welding of aluminum and aluminum alloy plates of a thickness more than 20 mm with a non-consumable electrode is conducted by inserting a filling material into a welding groove, applying a direct current of more than 300 A between said non-consumable electrode which does not have a sharp end and said plates to be welded with straight polarity, maintaining an arc length from 0.5 to 5 mm and shielding the welding groove area with a shielding gas comprising at least 50% helium.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: April 19, 1977
    Assignee: Kobe Steel Ltd.
    Inventors: Minoru Oishi, Masaharu Rokujo, Hisaaki Yokota, Naoki Okuda, Makoto Tomita, Toshihiko Endo