Patents by Inventor Hisaki Koga

Hisaki Koga 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).

  • Heat treating device and heat treating method
    Patent number: 7648600
    Abstract: A heat treatment apparatus 10 comprises a supporting unit 20 for supporting a columnar workpiece 12 turnably, and an induction-heating coil 30 for induction-heating the workpiece 12 supported turnably by the supporting unit 20. Below the workpiece 12 supported by the supporting unit 20, a cooling tank 50 is provided which contains a liquid coolant. The workpiece 12 is made of steel such as carbon steel for mechanical structure, and spring steel. The workpiece 12 is made of a material which has a magnetic transformation point at 770° C. The material is ferromagnetic below this temperature, and becomes paramagnetic above this temperature.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: January 19, 2010
    Assignee: Neturen Co., Ltd.
    Inventors: Yoshimasa Tanaka, Hisaki Koga, Kazuhiro Kawasaki
  • HEAT TREATING DEVICE AND HEAT TREATING METHOD
    Publication number: 20090159157
    Abstract: A heat treatment apparatus 10 comprises a supporting unit 20 for supporting a columnar workpiece 12 turnably, and an induction-heating coil 30 for induction-heating the workpiece 12 supported turnably by the supporting unit 20. Below the workpiece 12 supported by the supporting unit 20, a cooling tank 50 is provided which contains a liquid coolant. The workpiece 12 is made of steel such as carbon steel for mechanical structure, and spring steel. The workpiece 12 is made of a material which has a magnetic transformation point at 770° C. The material is ferromagnetic below this temperature, and becomes paramagnetic above this temperature.
    Type: Application
    Filed: January 29, 2009
    Publication date: June 25, 2009
    Applicant: NETUREN CO.,LTD.
    Inventors: Yoshimasa TANAKA, Hisaki KOGA, Kazuhiro KAWASAKI
  • Heat treatment apparatus and heat treatment method
    Publication number: 20070138169
    Abstract: A heat treatment apparatus 10 comprises a supporting unit 20 for supporting a columnar workpiece 12 turnably, and an induction-heating coil 30 for induction-heating the workpiece 12 supported turnably by the supporting unit 20. Below the workpiece 12 supported by the supporting unit 20, a cooling tank 50 is provided which contains a liquid coolant. The workpiece 12 is made of steel such as carbon steel for mechanical structure, and spring steel. The workpiece 12 is made of a material which has a magnetic transformation point at 770° C. The material is ferromagnetic below this temperature, and becomes paramagnetic above this temperature.
    Type: Application
    Filed: November 25, 2003
    Publication date: June 21, 2007
    Applicant: NETUREN CO., LTD.
    Inventors: Yoshimasa Tanaka, Hisaki Koga, Kazuhiro Kawasaki