Patents by Inventor John Thiermann

John Thiermann 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).

  • Catalytic muffler having crossover passageway for secondary air
    Patent number: 8136350
    Abstract: A catalytic muffler that treats the exhaust gases of an internal combustion engine. The catalytic muffler includes a catalyst chamber, a catalyst disposed in the catalyst chamber, an upstream chamber disposed upstream of the catalyst, an exhaust inlet configured to receive exhaust gases, an exhaust outlet configured to discharge converted gases converted by the catalyst to the atmosphere, and further configured to receive secondary air, and a passageway communicating between the exhaust outlet and the upstream chamber, and configured to provide the secondary air received by the exhaust outlet to the upstream chamber.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: March 20, 2012
    Assignee: Briggs & Stratton Corporation
    Inventors: David Duch, Gary Gracyalny, John Thiermann
  • CATALYTIC MUFFLER HAVING CROSSOVER PASSAGEWAY FOR SECONDARY AIR
    Publication number: 20090293462
    Abstract: A catalytic muffler that treats the exhaust gases of an internal combustion engine. The catalytic muffler includes a catalyst chamber, a catalyst disposed in the catalyst chamber, an upstream chamber disposed upstream of the catalyst, an exhaust inlet configured to receive exhaust gases, an exhaust outlet configured to discharge converted gases converted by said catalyst to the atmosphere, and further configured to receive secondary air, and a passageway communicating between the exhaust outlet and the upstream chamber, and configured to provide the secondary air received by the exhaust outlet to the upstream chamber.
    Type: Application
    Filed: May 28, 2008
    Publication date: December 3, 2009
    Inventors: David Duch, Gary Gracyalny, John Thiermann