Patents by Inventor Harold Grajzl

Harold Grajzl 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).

  • Publication number: 20080216989
    Abstract: A fracture-resistant charge air cooler header is provided. The internal side of the header includes, at select locations most likely to sustain a fracture, a reinforcing weld bead or “nugget” of sufficient height to create a section modulus change. The weld bead is preferably formed from a highly ductile alloy, such as AA 1100 aluminum alloy, and may surround either a portion of the header component associated with a tube or its entire perimeter.
    Type: Application
    Filed: March 7, 2007
    Publication date: September 11, 2008
    Applicant: Behr America Inc.
    Inventor: Harold A. Grajzl
  • Publication number: 20070051503
    Abstract: A corrosion-resistant heat exchanger for use in cooling a mixture of exhaust gas and charged air is provided comprising an air inlet chamber, an air outlet chamber, and a plurality of flat tubes through which the mixture passes and is cooled by ambient air. The flat tubes include turbulators to promote cooling of the exhaust gas/air mixture, and the turbulators are formed from a first aluminum alloy that is cladded by a second aluminum alloy, which combination of alloys create a sacrificial “brown band” layer upon brazing. In a highly preferred embodiment, both the tubes and the turbulators are formed of the same material.
    Type: Application
    Filed: September 8, 2005
    Publication date: March 8, 2007
    Inventor: Harold Grajzl