Patents by Inventor Kiyohumi Kawai

Kiyohumi Kawai 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).

  • Patent number: 8124006
    Abstract: The molten metal-transferring ladle including a ladle body having a storage space for melted metal, and an opening on the top; a large lid having an inlet in the middle, and covering an upper opening of the ladle body; an openable small lid covering the inlet; a tapping portion communicating the interior with the exterior of the storage space; and a pressurizing gas supplying means supplying a pressurizing gas to the storage space; the large lid having a supplying means installing hole communicating the interior with the exterior of the storage space; and the pressurizing gas supplying means being detachably mounted to the supplying means installing hole.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: February 28, 2012
    Assignees: Nippon Crucible Co., Ltd., Daiki Aluminium Industry Co., Ltd.
    Inventors: Katsuyoshi Mukai, Toshiyuki Matsumoto, Kiyohumi Kawai
  • Publication number: 20090114685
    Abstract: To provide a pressure-tapping type molten metal-transferring ladle that is safe and has excellent workability, and is capable of reliably introducing a pressurizing gas. The molten metal-transferring ladle including a ladle body having a storage space for melted metal, and an opening on the top; a large lid having an inlet in the middle, and covering an upper opening of the ladle body; an openable small lid covering the inlet; a tapping portion communicating the interior with the exterior of the storage space; and a pressuring gas supplying means supplying a pressurizing gas to the storage space; the large lid having a supplying means installing hole communicating the interior with the exterior of the storage space; and the pressuring gas supplying means being detachably mounted to the supplying means installing hole.
    Type: Application
    Filed: March 23, 2007
    Publication date: May 7, 2009
    Applicants: NIPPON CRUCIBLE CO., LTD., DAIKI ALUMINIUM INDUSTRY CO., LTD.
    Inventors: Katsuyoshi Mukai, Toshiyuki Matsumoto, Kiyohumi Kawai
  • Publication number: 20090065987
    Abstract: An object of the present invention is to provide a molten metal ladle in which scales, slag, etc., that adhere to the lining surface can be removed easily and reliably. The present invention provides a molten metal ladle provided with a bottomed tubular ladle body having an opening on the top, wherein the ladle body (10) has an upper ladle portion (12) and a lower ladle portion (11); the upper ladle portion (12) being connected to the top end of the lower ladle portion (11); lining layers (17,18) being provided inside the upper ladle portion (12) and lower ladle portion (11); and the innermost surface of the lining layer (18) of the upper ladle portion (12) being formed as an inclined plane wherein the opening area decreases from the top of the lining layer (17) of the lower ladle portion (11) toward the edge of the opening (13).
    Type: Application
    Filed: October 14, 2005
    Publication date: March 12, 2009
    Applicants: DAIKI ALUMINIUM INDUSTRY CO., LTD., NIPPON CRUCIBLE CO., LTD.
    Inventors: Kiyohumi Kawai, Katsuyoshi Mukai, Toshiyuki Matsumoto