Patents by Inventor Norihiko Sawada

Norihiko Sawada 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).

  • Muffler of internal combustion engine
    Patent number: 7789195
    Abstract: A variable muffler corresponds to a muffler of an internal combustion engine including a variable valve that controls the flow of exhaust gas. The variable muffler includes a muffler body forming a muffler chamber, an inlet pipe with an opening at the muffler chamber to direct the flow of exhaust gas from the opening towards the muffler chamber, and a muffler-in pipe arranged in the muffler chamber. The muffler-in pipe includes an opening facing the opening at the muffler chamber, and into which the exhaust gas output from the opening flows in a predetermined direction. The muffler-in pipe further includes a slope inclining vertically downwards towards the opening, and extending in a direction different from the predetermined direction. By such a configuration, a muffler of an internal combustion engine having proper driving of the valve ensured can be provided.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: September 7, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoki Mabuchi, Norihiko Sawada, Fumihiko Mizuno
  • Muffler of Internal Combustion Engine
    Publication number: 20080035420
    Abstract: A variable muffler corresponds to a muffler of an internal combustion engine including a variable valve that controls the flow of exhaust gas. The variable muffler includes a muffler body forming a muffler chamber, an inlet pipe with an opening at the muffler chamber to direct the flow of exhaust gas from the opening towards the muffler chamber, and a muffler-in pipe arranged in the muffler chamber. The muffler-in pipe includes an opening facing the opening at the muffler chamber, and into which the exhaust gas output from the opening flows in a predetermined direction. The muffler-in pipe further includes a slope inclining vertically downwards towards the opening, and extending in a direction different from the predetermined direction. By such a configuration, a muffler of an internal combustion engine having proper driving of the valve ensured can be provided.
    Type: Application
    Filed: January 12, 2006
    Publication date: February 14, 2008
    Inventors: Tomoki Mabuchi, Norihiko Sawada, Fumihiko Mizuno