Patents by Inventor Gregory J Tomkiewicz

Gregory J Tomkiewicz 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).

  • Cam bearing surface of an engine cylinder head that includes an axially extending oil passage
    Patent number: 8166939
    Abstract: A method of forming a cylinder head may include machining an upper surface of a cam tower of the cylinder head to form a generally planar surface. An oil passage may be drilled in the upper surface to provide an oil feed. A bearing bore may be formed in the upper surface of the cam tower. The bearing bore may include a recess having first and second circumferential ends. The oil passage may intersect the first circumferential end.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: May 1, 2012
    Inventors: Jose Manuel Lopez-Crevillen, Robert J. Moran, Gregory J Tomkiewicz