Patents by Inventor Tadaaki Yamaguchi

Tadaaki Yamaguchi 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).

  • Exhaust gas heat exchanger
    Patent number: 7681629
    Abstract: A heat exchange core has a plurality of flat tubes laminated in a thickness direction, each flat tube defining an exhaust gas passage in which the exhaust gas flows. A plurality of coolant flow pass holes are formed in each of the flat tubes, wherein each of the coolant flow pass holes penetrates the flat tube in the thickness direction. The coolant flow pass holes of each flat tube are connected with the coolant flow pass holes of the other flat tubes, in order to respectively form a plurality of coolant flow passages through which liquid coolant flows, and the coolant flow pass holes of each coolant flow passages are communicated with each other in the laminated direction, so that the coolant flow passages are formed to be perpendicular to the exhaust gas passages.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: March 23, 2010
    Assignee: DENSO Corporation
    Inventors: Hiroo Yamaguchi, Tadaaki Yamaguchi, legal representative, Hideko Yamaguchi, legal representative, Yuuji Sako, Kenshiro Muramatsu
  • Exhaust gas heat exchanger
    Publication number: 20060207245
    Abstract: A heat exchange core has a plurality of flat tubes laminated in a thickness direction, each flat tube defining an exhaust gas passage in which the exhaust gas flows. A plurality of coolant flow pass holes are formed in each of the flat tubes, wherein each of the coolant flow pass holes penetrates the flat tube in the thickness direction. The coolant flow pass holes of each flat tube are connected with the coolant flow pass holes of the other flat tubes, in order to respectively form a plurality of coolant flow passages through which liquid coolant flows, and the coolant flow pass holes of each coolant flow passages are communicated with each other in the laminated direction, so that the coolant flow passages are formed to be perpendicular to the exhaust gas passages.
    Type: Application
    Filed: March 3, 2006
    Publication date: September 21, 2006
    Applicant: DENSO Corporation
    Inventors: Hiroo Yamaguchi, Tadaaki Yamaguchi, Hideko Yamaguchi, Yuuji Sako, Kenshiro Muramatsu