Patents by Inventor Kevin J. Dewar

Kevin J. Dewar 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).

  • Industrial fan
    Patent number: 7670114
    Abstract: An engine fan has fan blades capable of switching between a sucking and blowing operation when the fan is not in operation. An internal mechanism allows for blade pitch adjustment of all fan blades by twisting one blade about its own axis. End positions of the blade rotation may be held by forces generated by the rotating blades or held by a locking mechanism.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: March 2, 2010
    Assignee: Flexxaire Manufacturing Inc.
    Inventors: Jonathan E. McCallum, Kevin J. Dewar