Patents by Inventor Yasuhiro Hirafune

Yasuhiro Hirafune 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).

  • Waste processing apparatus, waste recovery system and liquid container
    Patent number: 6098649
    Abstract: A waste processing apparatus which can easily and efficiently process waste, a waste recovery system using this apparatus and a liquid container ideal for use with the waste processing apparatus and waste recovery system. The waste processing apparatus comprises a processing part for processing supplied waste (for example foam polystyrene) with a processing liquid (for example limonene) and a storing part for storing produced liquid (for example limonene containing dissolved foam polystyrene) produced in this processing part and provided with a removable liquid container constructed to both supply processing liquid to the processing part and receive produced liquid produced by the waste processing apparatus.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: August 8, 2000
    Assignee: Sony Corporation
    Inventors: Tsutomu Noguchi, Minoru Matsushima, Hiraku Sugiki, Yasuhiro Hirafune
  • Magnetic head drum and method of manufacturing same
    Patent number: 6015627
    Abstract: A head drum for supporting a magnetic head for magnetically recording information on and reproducing information from a magnetic tape includes an inner body of an aluminum alloy, and a wear-resistant layer of a sintered powdery alloy disposed around an outer circumference of the inner body in at least a region for sliding contact with an elongate magnetic recording medium. The wear-resistant layer has a thickness of at least 0.2 um, and the sintered powdery alloy comprises a powdery alloy of 17 to 38% of Si, 0.5 to 5% of Cu, 0.3 to 5% of Mg, and the remainder of aluminum.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: January 18, 2000
    Assignees: Sony Corporation, Sumitomo Light Metal Industries, Ltd.
    Inventors: Yasuhiro Hirafune, Akio Kikuchi
  • Waste processing apparatus, waste recovery system and liquid container
    Patent number: 5863002
    Abstract: A waste processing apparatus which can easily and efficiently process waste, a waste recovery system using this apparatus and a liquid container ideal for use with the waste processing apparatus and waste recovery system. The waste processing apparatus comprises a processing part for processing supplied waste (for example foam polystyrene) with a processing liquid (for example limonene) and a storing part for storing produced liquid (for example limonene containing dissolved foam polystyrene) produced in this processing part and provided with a removable liquid container constructed to both supply processing liquid to the processing part and receive produced liquid produced by the waste processing apparatus.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: January 26, 1999
    Assignee: Sony Corporation
    Inventors: Tsutomu Noguchi, Minoru Matsushima, Hiraku Sugiki, Yasuhiro Hirafune