Patents by Inventor Mitsuhiro Otaki

Mitsuhiro Otaki 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).

  • Continuous vacuum refining method of molten metal and apparatus thereof
    Patent number: 6607578
    Abstract: A continuous vacuum refining method of molten metals, wherein impurities in the molten metal are eliminated by evaporation by stirring the molten metal (1) in the molten liquid stirring part B in the evacuated and pre-heated vacuum chamber, the molten liquid is transferred from the stirring part B to the tapping part C in the chamber through connecting holes, the molten liquid is continuously guided into the vessel in the refined molten liquid recovery chambers (10a), (10b) through the recovery passageways (8a), (8b) connected to the tapping part C, the recovery chamber being evacuated and connected with the passageway, and the refined molten liquid (9) is recovered after returning the pressure to the atmospheric pressure, wherein the molten liquid is discharged using plural passageways and plural recovery chambers connected with the respective passageways with alternating the recovery chamber. An apparatus employed for this method.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: August 19, 2003
    Assignees: Kobe Steel, Ltd., Showa Denka K.K., Sky Aluminum Co., Ltd., Nippon Light Metal Company, Ltd., The Furukawa Electric Co., Ltd, Mitsubishi Aluminum Co., Ltd.
    Inventors: Mitsuhiro Otaki, Kensuke Mori
  • Continuous vacuum refining method of molten metal and apparatus thereof
    Publication number: 20020121158
    Abstract: A continuous vacuum refining method of molten metals, wherein impurities in the molten metal are eliminated by evaporation by stirring the molten metal (1) in the molten liquid stirring part B in the evacuated and pre-heated vacuum chamber, the molten liquid is transferred from the stirring part B to the tapping part C in the chamber through connecting holes, the molten liquid is continuously guided into the vessel in the refined molten liquid recovery chambers (10a), (10b) through the recovery passageways (8a), (8b) connected to the tapping part C, the recovery chamber being evacuated and connected with the passageway, and the refined molten liquid (9) is recovered after returning the pressure to the atmospheric pressure, wherein the molten liquid is discharged using plural passageways and plural recovery chambers connected with the respective passageways with alternating the recovery chamber. An apparatus employed for this method.
    Type: Application
    Filed: November 21, 2001
    Publication date: September 5, 2002
    Inventors: Mitsuhiro Otaki, Kensuke Mori