Cable restrained reciprocating blade system for energy extractio

Power plants – Pressure fluid source and motor – Cyclically operable reciprocating or oscillating motor or...

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60398, 415 31, F16D 3102, F03B 1312

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active

055489567

ABSTRACT:
A cable restrained reciprocating blade system is adapted for extracting energy from a moving body of water to facilitate conversion to electric energy. In an exemplary embodiment, the system includes a blade placed in a moving body of water and having a hydrofoil configuration adapting it to undergo lateral movement in response to contact with the moving body of water, a control cable attached to an upstream end of the blade and applying a condition of tension to the blade, a pair of power cables attached at first ends to a downstream end of the blade and extending in generally transverse relationship to the direction of flow of the moving body of water and in opposite directions from blade, and a load mechanism connected to second ends of the power cables for alternately applying conditions of tension and slack thereto so as to orient the blade at an angle of attack that causes the blade to undergo lateral movement through an oscillatory path extending generally transverse to the direction of flow of the moving body of water and thereby extract energy from the moving body of water. The load mechanism also is operable to cause the blade upon reaching the respective opposite ends of the oscillatory path to reverse the orientation of the angle of attack of the blade relative to the given flow direction so that the blade will then respond to the moving body of water and initiate movement in the opposite direction along the oscillatory path.

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patent: 4303834 (1981-12-01), Li
patent: 4470770 (1984-09-01), Grose
patent: 4525122 (1985-06-01), Krnac

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