Patents by Inventor Takefumi Mitani

Takefumi Mitani 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).

  • Engine exhaust system for a vehicle
    Patent number: 7628238
    Abstract: An engine exhaust system for a vehicle is provided in which it is possible to obtain necessary vibration damping performance even when there are layout restrictions. For instance, a spherical joint on a front side of the vehicle and a spherical joint on a rear side of the vehicle, are positioned before and after two catalysts, and the components positioned between the front and rear spherical joints is unsupported by a vehicle body. Hence, a dynamic damper is formed. The resonant frequency of the dynamic damper, i.e. a frequency at which vibrations are absorbed can be adjusted by altering the modulus of elasticity and weight of the dynamic damper. Therefore, the necessary vibration damping performance can be obtained despite layout restrictions.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: December 8, 2009
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masanari Kobayashi, Takefumi Mitani
  • Engine exhaust system for a vehicle
    Publication number: 20060185924
    Abstract: An engine exhaust system for a vehicle is provided in which it is possible to obtain necessary vibration damping performance even when there are layout restrictions. For instance, a spherical joint on a front side of the vehicle and a spherical joint on a rear side of the vehicle, are positioned before and after two catalysts, and the components positioned between the front and rear spherical joints is unsupported by a vehicle body. Hence, a dynamic damper is formed. The resonant frequency of the dynamic damper, i.e. a frequency at which vibrations are absorbed can be adjusted by altering the modulus of elasticity and weight of the dynamic damper. Therefore, the necessary vibration damping performance can be obtained despite layout restrictions.
    Type: Application
    Filed: June 28, 2005
    Publication date: August 24, 2006
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Masanari Kobayashi, Takefumi Mitani