Patents by Inventor Andrew L Norell

Andrew L Norell 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).

  • Variable pitch fan having a pitch sensor
    Patent number: 9086076
    Abstract: A compact variable pitch fan has a drive fluid pitch change mechanism. A pitch change piston is constrained to follow reciprocating motion under drive fluid control within a peripheral hub from which fan blades extend outward. A pitch change sensor is mounted with the rotary union.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: July 21, 2015
    Assignee: Flexxaire Inc.
    Inventors: Jonathan E. McCallum, Andrew L. Norell, George Antoszko, Mariusz Kloza
  • VARIABLE PITCH FAN HAVING A PITCH SENSOR
    Publication number: 20120263593
    Abstract: A compact variable pitch fan has a drive fluid pitch change mechanism. A pitch change piston is constrained to follow reciprocating motion under drive fluid control within a peripheral hub from which fan blades extend outward. A pitch change sensor is mounted with the rotary union.
    Type: Application
    Filed: December 20, 2010
    Publication date: October 18, 2012
    Applicant: FLEXXAIRE INC.
    Inventors: Jonathan E. McCallum, Andrew L. Norell, George Antoszko, Mariusz Kloza
  • Control system for variable pitch fan
    Patent number: 7229250
    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: Grant
    Filed: October 20, 2004
    Date of Patent: June 12, 2007
    Assignee: Flexxaire Manufacturing Inc.
    Inventors: Jonathan E McCallum, Andrew L Norell