Patents by Inventor Jonathan McCallum

Jonathan McCallum 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
    Publication number: 20060280608
    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: Application
    Filed: June 16, 2005
    Publication date: December 14, 2006
    Inventors: Jonathan McCallum, Kevin Dewar
  • Control system for variable pitch fan
    Publication number: 20050100444
    Abstract: Pitch control of a variable pitch fan is obtained using pulsed pressure. Pitch is varied incrementally either towards or away from full pitch by pulsed application of fluid to a piston used to drive the blades of the fan into or away from full pitch. Reverse pitch is used to clear debris from the fan. Valves control flow of fluid to the piston. The valve operation is controlled by a controller.
    Type: Application
    Filed: October 20, 2004
    Publication date: May 12, 2005
    Applicant: Flexxaire Manufacturing Inc.
    Inventors: Jonathan McCallum, Andrew Norell