Patents by Inventor Francis M. Penterman

Francis M. Penterman 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).

  • Air foil with trailing spoiler
    Patent number: 4571156
    Abstract: An air foil which is coupled to a wind energy conversion machine is provided with a flexible and resilent trailing spoiler that limits the rotational speed of the machine and prevents overspeeding. The trailing spoiler is a flexible and resilient sheet that is laminated to the upwind side of a rigid blade so that a portion of the sheet extends past the trailing edge of the blade. The portion of the sheet that extends past the trailing edge bends towards the wind during high wind conditions to prevent overspeeding of the machine.
    Type: Grant
    Filed: March 5, 1984
    Date of Patent: February 18, 1986
    Assignee: D. C. Research, Inc.
    Inventor: Francis M. Penterman