Fluid reaction surfaces (i.e. – impellers) – With control means responsive to non-cyclic condition... – Responsive to condition of torque or thrust of device or...
Patent
1998-11-17
2000-12-12
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
With control means responsive to non-cyclic condition...
Responsive to condition of torque or thrust of device or...
B63H 300
Patent
active
061589608
ABSTRACT:
A mechanism for automatically changing the pitch of propeller blades employing engine torque alone which increases with air speed. A powered hub mounts at least two blades and includes blade pitch changing elements automatically responsive to engine torque for changing blade pitch. The elements include a gear train having a drive gear and several driven gears with flexible coupling components interconnected therebetween. The flexible coupling includes a number of compressible components disposed in cavities in a circular array between the driving gear and the driven gears and which distort under torsional loads at a pre-determined rate.
As engine torque changes due to aerodynamic loads on the blades, the flexible coupling components distort causing the blades to change pitch angle.
Look Edward K.
Marrs Roger A.
Rodriguez Hermes
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