Patents by Inventor Youhei Toyoshima

Youhei Toyoshima 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
    Patent number: 7503427
    Abstract: A muffler is capable of sufficiently reducing flow noise, discharge noise, vehicle noise, and cabin noise, preventing a pressure loss, and improving output power. The muffler has a muffler body, an upstream pipe that opens in the muffler body, and a downstream pipe that opens in the muffler body. An opening is formed in a side wall of the downstream pipe in the muffler body. The opening consists of many small holes arranged in an elongated area extending in an axial direction of the downstream pipe.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: March 17, 2009
    Assignee: Calsonic Kansei Corporation
    Inventor: Youhei Toyoshima
  • Muffler
    Publication number: 20040182643
    Abstract: A muffler is capable of sufficiently reducing flow noise, discharge noise, vehicle noise, and cabin noise, preventing a pressure loss, and improving output power. The muffler has a muffler body, an upstream pipe that opens in the muffler body, and a downstream pipe that opens in the muffler body. An opening is formed in a side wall of the downstream pipe in the muffler body. The opening consists of many small holes arranged in an elongated area extending in an axial direction of the downstream pipe.
    Type: Application
    Filed: February 20, 2004
    Publication date: September 23, 2004
    Inventor: Youhei Toyoshima
  • Muffler
    Publication number: 20040149515
    Abstract: The muffler includes a sound-absorbing structure (1A, 1B) having a gas introduced from a fuel cell (100). The muffler includes an outlet (13) defined by the sound-absorbing structure for discharging a drain separated from the gas.
    Type: Application
    Filed: January 21, 2004
    Publication date: August 5, 2004
    Applicant: CALSONIC KANSEI CORPORATION
    Inventor: Youhei Toyoshima
  • Acoustic dumper for exhaust system
    Publication number: 20040094360
    Abstract: An exhaust system has a tubular member (1) to discharge exhaust produced in an engine or a compressor and a muffler (5) connected to the tubular member (1). An exhaust chamber 10 to attenuate noise emitted from the muffler (5) due to pulsation of the exhaust is arranged in the tubular member (1) or at an exhaust upstream side in the muffler (5).
    Type: Application
    Filed: November 5, 2003
    Publication date: May 20, 2004
    Applicant: CALSONIC KANSEI CORPORATION
    Inventor: Youhei Toyoshima