Patents by Inventor Aaron Karch

Aaron Karch 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).

  • Piston having combustion bowl shaped to balance combustion efficiency and emission properties
    Patent number: 9234451
    Abstract: A piston for a compression ignition internal combustion engine includes a piston body having a combustion face defining a combustion bowl, and the combustion face including a compound bowl surface and a compound rim surface. The combustion face is profiled to balance a combustion efficiency property of the piston with emissions properties of the piston. A ratio of a diameter of the combustion bowl to a diameter of the cylinder bowl bore is from 0.68 to 0.74. Other dimensional and proportional features of the piston support low smoke and NOx production during operation.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: January 12, 2016
    Assignee: Caterpillar Inc.
    Inventors: Aaron Karch, David A. Pierpont, Daniel Lang, James A. Subatch
  • Piston Having Combustion Bowl Shaped To Balance Combustion Efficiency And Emission Properties
    Publication number: 20130239925
    Abstract: A piston for a compression ignition internal combustion engine includes a piston body having a combustion face defining a combustion bowl, and the combustion face including a compound bowl surface and a compound rim surface. The combustion face is profiled to balance a combustion efficiency property of the piston with emissions properties of the piston. A ratio of a diameter of the combustion bowl to a diameter of the cylinder bowl bore is from 0.68 to 0.74. Other dimensional and proportional features of the piston support low smoke and NOx production during operation.
    Type: Application
    Filed: May 13, 2013
    Publication date: September 19, 2013
    Applicant: Caterpillar, Inc.
    Inventors: Aaron Karch, David A. Pierpont, Daniel Lang, James A. Subatch, Jr.