Patents by Inventor John Lewis Warmenhoven

John Lewis Warmenhoven 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).

  • Embossed shell for spun mufflers
    Patent number: 6892855
    Abstract: An exhaust muffler with a single-wall shell having a first end and a second end features a plurality of embossments formed on the shell and extending from the first end of the muffler to the second end of the muffler. The embossments are arranged in a pattern such that any straight line extending from the first end to the second end intersects at least one of the embossments, thereby imparting increased stiffness to the muffler shell. Each of the embossments preferably have an elliptical shape and are arranged in rows extending substantially parallel to a longitudinal axis of the muffler. The embossments in any given row are rotated ninety degrees from the embossments in preceding and succeeding rows and are spaced to provide an interlocking pattern.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: May 17, 2005
    Assignee: Tenneco Automotive Operating Company Inc.
    Inventor: John Lewis Warmenhoven
  • Embossed shell for spun mufflers
    Publication number: 20040163885
    Abstract: An exhaust muffler with a single-wall shell having a first end and a second end features a plurality of embossments formed on the shell and extending from the first end of the muffler to the second end of the muffler. The embossments are arranged in a pattern such that any straight line extending from the first end to the second end intersects at least one of the embossments, thereby imparting increased stiffness to the muffler shell. Each of the embossments preferably have an elliptical shape and are arranged in rows extending substantially parallel to a longitudinal axis of the muffler. The embossments in any given row are rotated ninety degrees from the embossments in preceding and succeeding rows and are spaced to provide an interlocking pattern.
    Type: Application
    Filed: February 25, 2003
    Publication date: August 26, 2004
    Inventor: John Lewis Warmenhoven