Control system for variable pitch fan

Details Control system for variable pitch fan Control system for variable pitch fan

2007-06-12

2007-06-12

Edgar, Richard A. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Method of operation

C123S041490

Reexamination Certificate

active

10970095

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.

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