Patents by Inventor David L. Piekarski

David L. Piekarski 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).

  • Adjustable exhaust system for internal combustion engine
    Patent number: 6799423
    Abstract: The invention is an adjustable exhaust system and an adjustable insert for an exhaust system. The exhaust system includes a header flange, at least one conduit coupled to the header flange, a collector coupled to the conduit, and an adjustable insert for tuning engine performance.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: October 5, 2004
    Inventor: David L. Piekarski
  • Exhaust system for internal combustion engine having parallelogram-shaped cross-section
    Patent number: 6742332
    Abstract: The present invention is an exhaust system having a parallelogram-shaped cross section. The exhaust system includes a header flange for connection to one or more cylinder exhaust ports. The header flange is coupled to one or more conduits. The conduits merge into a collector, which may or may not include a muffler.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: June 1, 2004
    Inventor: David L. Piekarski
  • Adjustable exhaust system for internal combustion engine
    Publication number: 20030136120
    Abstract: The present invention is an adjustable exhaust system and an adjustable insert for an exhaust system. The exhaust system includes a header flange, at least one conduit coupled to the header flange, a collector coupled to the conduit, and an adjustable insert for tuning engine performance.
    Type: Application
    Filed: July 26, 2002
    Publication date: July 24, 2003
    Inventor: David L. Piekarski
  • Exhaust system for internal combustion engine having parallelogram-shaped cross-section
    Publication number: 20030136121
    Abstract: The present invention is an exhaust system having a parallelogram-shaped cross section. The exhaust system includes a header flange for connection to one or more cylinder exhaust ports. The header flange is coupled to one or more conduits. The conduits merge into a collector, which may or may not include a muffler.
    Type: Application
    Filed: July 26, 2002
    Publication date: July 24, 2003
    Inventor: David L. Piekarski