Patents by Inventor Mark C. Treadwell

Mark C. Treadwell 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).

  • Patent number: 4537027
    Abstract: A hybrid exhaust manifold is provided for use with a vehicular engine. The manifold includes an inlet flange formed from a metal plate to be mounted against the engine cylinder head. The inlet flange includes exhaust ports which align with the exhaust ports of the engine cylinder head. Inner and outer stamped sheet metal shells are provided to mate with one another for forming an enclosed exhaust chamber. The inner shell includes inlet apertures which align respectively with the exhaust ports of the inlet flange. The outer shell includes an outlet aperture. An outlet tube is affixed to the outlet aperture of the outer shell, and an outlet flange is affixed to the end of the outlet tube opposite the outer shell to facilitate connection of the outlet tube to the exhaust pipe. The subject hybrid exhaust manifold can be adapted to fit within a very small space envelope in the engine compartment.
    Type: Grant
    Filed: November 21, 1983
    Date of Patent: August 27, 1985
    Assignee: APX Group, Inc.
    Inventors: Jon W. Harwood, Michael W. Clegg, Mark C. Treadwell