Patents by Inventor Duane W. Forquer

Duane W. Forquer 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).

  • Internal combustion engine
    Patent number: 4993369
    Abstract: A two-stroke internal combustion engine comprising an engine block including a first exterior surface portion, a second exterior surface portion spaced from the first portion and having therein a crankcase-defining cavity, and a combustion air passage extending from the first exterior surface portion to the crankcase-defining cavity, an intake manifold fixed to the first exterior surface portion of the engine block and including therein a combustion air passage in alignment with the combustion air passage in the engine block, and a carburetor fixed to the intake manifold and having therein a combustion air passage in alignment with the intake manifold combustion air passage.
    Type: Grant
    Filed: May 18, 1990
    Date of Patent: February 19, 1991
    Assignee: Outboard Marine Corporation
    Inventors: Paul W. Breckenfeld, George L. Broughton, Duane W. Forquer