Patents by Inventor Takahiro Nagura

Takahiro Nagura 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).

  • Turbocharged engine
    Patent number: 5095704
    Abstract: A turbo-charged internal combustion engine having the cylinders communicating with exhaust passages that merge into common outlets that are disposed midway between the exhaust passages and which lie in a common plane. A cooling jacket encircles these exhaust passages and is divided by a wall into upper and lower portions.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: March 17, 1992
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Takahiro Nagura, Kazutoshi Suzuki
  • Turbo-charged engine
    Patent number: 4993227
    Abstract: A turbo-charged internal combustion engine having the cylinders communicating with exhaust passages that merge into common outlets that are disposed midway between the exhaust passages and which lie in a common plane. A cooling jacket encircles these exhaust passages and is divided by a wall into upper and lower portions.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: February 19, 1991
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Takahiro Nagura, Kazutoshi Suzuki
  • Intake system for internal combustion engine
    Patent number: 4660530
    Abstract: An induction system for an internal combustion engine that improves mid range torque without sacrificing low speed running or high speed performance. Each cylinder of the engine is served by two intake ports that are, in turn, served by respective intake passages that have a common portion. A first throttle valve is positioned in the common portion for precluding the back flow of exhaust gases and for controlling the flow to the chamber. In addition, first and second inlet passages discharge into the common intake passage and a throttle valve is positioned in one of those inlet passages.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: April 28, 1987
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Keiichi Sugiyama, Takahiro Nagura