Fluid reaction surfaces (i.e. – impellers) – Oscillatory reaction motion – Compound motion
Patent
1993-04-09
1994-06-28
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Oscillatory reaction motion
Compound motion
416 79, 416 17, F03B 300
Patent
active
053241690
ABSTRACT:
An apparatus for power production from low velocity fluid flow includes a lateral support arm assembly extending from a vertical drive shaft. A power blade is pivotally secured to the distal end of the support arm, and constrained to pivot within a defined operating angle. The center of force on the power blade is proximal to the power blade pivot, so that at the limit of travel of the support arm the thrust on the power blade moves the power blade into an over-center position, causing the power blade to pivot in retrograde fashion. The pivoted power blade then drives the support arm away from the extreme position, through a neutral position, to the opposite angular position, where the process reiterates and reverses. Thus the lateral support arm is driven continuously in oscillating, lateral motion. An exciter blade joined to the proximal end of the support arm creates a force that augments the torque created by the power blade, and drives the arm past the over-center point of the power blade, causing the power blade to rotate and drive the arm retrograde toward the neutral position. A latch maintains the exciter blade aligned with the arm as it pivots from the neutral (midline) position toward the angular limit of the arm.
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Brown George L.
Hales Paul
Larson James A.
Look Edward K.
Zimmerman Harris
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