Patents by Inventor Sanshirou Obara

Sanshirou Obara 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).

  • Power inverter
    Patent number: 6414867
    Abstract: A heat sink or cooling case has a cooling channel and at least one opening formed to face part of the channel. A first seal is provided outside the at least one opening. A cooling case has a groove located outside the first seal. Holes are discretely formed in the groove and lead from the groove to an exterior of the cooling case. A second seal is provided outside the groove. A radiating plate constituting a circuit case is mounted on the heat sink by using a clamping device inside or outside the second seal.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: July 2, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Osamu Suzuki, Heikichi Kuwabara, Akio Yasukawa, Mitsuyuki Hombu, Hirohisa Yamamura, Sanshirou Obara, Kaname Sasaki
  • Power inverter
    Publication number: 20010014029
    Abstract: A heat sink or cooling case has a cooling channel and at least one opening formed to face part of the channel. A first seal is provided outside the at least one opening. A cooling case has a groove located outside the first seal. Holes are discretely formed in the groove and leads from the groove to an exterior of the cooling case. A second seal is provided outside the groove. A radiating plate constituting a circuit case is mounted on the heat sink by using a clamping device inn or outside the second seal.
    Type: Application
    Filed: February 16, 2001
    Publication date: August 16, 2001
    Inventors: Osamu Suzuki, Heikichi Kuwabara, Akio Yasukawa, Mitsuyuki Hombu, Hirohisa Yamamura, Sanshirou Obara, Kaname Sasaki