Patents by Inventor Akimichi Nagaura

Akimichi Nagaura 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).

  • Apparatus and method of manufacturing silicon seed rod
    Patent number: 8444800
    Abstract: A manufacturing apparatus of silicon seed rod in which two silicon seed rods are joined into one long silicon seed rod by welding, having: an upper seed rod holding part holding an upper silicon seed rod vertically; an elevating device holding a lower silicon seed rod which faces a lower end of the upper silicon seed rod in a state in which the lower silicon seed rod is movable vertically; an induction-heating coil being arranged around the lower end of the upper silicon seed rod; a preheating ring being disposed below the induction-heating coil; and a moving device of the preheating ring that moves the preheating ring between a heat position in which the preheating ring is induction-heated around an upper end of the lower silicon seed rod by the induction-heating coil and a wait position which is distant from the heat position.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: May 21, 2013
    Assignee: Mitsubishi Materials Corporation
    Inventors: Akimichi Nagaura, Mamoru Nakano
  • APPARATUS AND METHOD OF MANUFACTURING SILICON SEED ROD
    Publication number: 20110220283
    Abstract: A manufacturing apparatus of silicon seed rod in which two silicon seed rods are joined into one long silicon seed rod by welding, having: an upper seed rod holding part holding an upper silicon seed rod vertically; an elevating device holding a lower silicon seed rod which faces a lower end of the upper silicon seed rod in a state in which the lower silicon seed rod is movable vertically; an induction-heating coil being arranged around the lower end of the upper silicon seed rod; a preheating ring being disposed below the induction-heating coil; and a moving device of the preheating ring that moves the preheating ring between a heat position in which the preheating ring is induction-heated around an upper end of the lower silicon seed rod by the induction-heating coil and a wait position which is distant from the heat position.
    Type: Application
    Filed: October 27, 2010
    Publication date: September 15, 2011
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Akimichi Nagaura, Mamoru Nakano