Patents by Inventor C. Cheng

C. Cheng 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 aftertreatment mixer with stamped muffler flange
    Publication number: 20070245718
    Abstract: An exhaust aftertreatment system, including injection of chemical species, has a mixer in the exhaust pipe between the injector and the aftertreatment element. The mixer is provided by a stamped muffler flange.
    Type: Application
    Filed: April 24, 2006
    Publication date: October 25, 2007
    Inventors: C. Cheng, Thomas Page
  • Tubular acoustic silencer
    Publication number: 20060180389
    Abstract: An acoustic silencer is provided by a tubular member extending along an axis and having a hollow interior defining an axial flow path therethrough. The tubular member has a sidewall with an interior face facing the hollow interior and having quarter wave resonators formed by blind holes therein.
    Type: Application
    Filed: August 10, 2005
    Publication date: August 17, 2006
    Inventors: C. Cheng, Zakir Quabili, Larry Gunderson, Mark Holzmann
  • Performance air filtration cartridge
    Publication number: 20060162303
    Abstract: An air filtration cartridge has annular filter media having a hollow interior and extending axially between first and second distally opposite end caps. The first end cap is an outlet end cap having flow straightening structure integrally formed therewith and spanning the hollow interior. The second end cap is a closed end cap having an interior face having quarter wave resonators formed by blind holes therein.
    Type: Application
    Filed: January 27, 2005
    Publication date: July 27, 2006
    Inventors: Larry Gunderson, Christopher Holm, Kelly Schmitz, Zakir Quabili, C. Cheng