Patents by Inventor Hans-Peter Mai

Hans-Peter Mai 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).

  • Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine
    Patent number: 7273592
    Abstract: A combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine is provided. The exhaust gas post treatment within the muffler, which forms sulfuric acid, takes place in at least one exhaust gas post treatment/muffler module, and only that housing thereof through which flows exhaust gas that is to be cleaned is produced from ferritic or austenitic stainless steel, thus making it possible to produce the outer walls of the muffler, as well as any inner element thereof, such as a transverse wall, that is disposed externally of the exhaust gas post treatment/muffler module of unalloyed sheet steel that is coated with aluminum or some other material.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: September 25, 2007
    Assignees: MAN Nutzfahrzeuge Aktiengesselschaft, Roth-Tecnik Austria Ges.m.b.H
    Inventors: Eberhard Jacob, Hans-Peter Mai
  • Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine
    Patent number: 6990804
    Abstract: A combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine is provided. A special platinum-coated preliminary oxidation catalytic converter is combined with at least one particle separator, which is exactly coordinated therewith, in a muffler to achieve carbon particle separation rates of greater than 50%.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: January 31, 2006
    Assignees: MAN Nutzfahrzeuge AG, Roth-Technik Austria Ges.m.b.H
    Inventors: Eberhard Jacob, Hans-Peter Mai
  • Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine
    Publication number: 20040202590
    Abstract: A combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine is provided. A special platinum-coated preliminary oxidation catalytic converter is combined with at least one particle separator, which is exactly coordinated therewith, in a muffler to achieve carbon particle separation rates of greater than 50%.
    Type: Application
    Filed: April 12, 2004
    Publication date: October 14, 2004
    Inventors: Eberhard Jacab, Hans-Peter Mai
  • Combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine
    Publication number: 20040202591
    Abstract: A combination exhaust gas post treatment/muffler device in the exhaust gas section of an internal combustion engine is provided. The exhaust gas post treatment within the muffler, which forms sulfuric acid, takes place in at least one exhaust gas post treatment/muffler module, and only that housing thereof through which flows exhaust gas that is to be cleaned is produced from ferritic or austenitic stainless steel, thus making it possible to produce the outer walls of the muffler, as well as any inner element thereof, such as a transverse wall, that is disposed externally of the exhaust gas post treatment/muffler module of unalloyed sheet steel that is coated with aluminum or some other material.
    Type: Application
    Filed: April 12, 2004
    Publication date: October 14, 2004
    Inventors: Eberhard Jacob, Hans-Peter Mai