Flexxaire Manufacturing Inc.

Kevin John Dewar

Jonathan Edwards McCallum

George Antoszko

Terry Dean Nelson

Andrew Louis Norell

Brendan Anthony Romano

Cameron Dean Westbrook

A compact variable pitch fan has a hydraulic pitch change mechanism. A pitch change piston is constrained to follow reciprocating motion under hydraulic control within a peripheral hub from which fan blades extend outward. An additional feature is the use of separated guiding and seal surfaces. A still further feature is the use of a pitch sensor, particularly on the hydraulic line leading to the variable pitch fan.

Compact variable pitch fan

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.

Industrial fan

Growing community of inventors

Edmonton, Canada

Kevin John Dewar