Adjustable blade turbines
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United States of America Patent
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Jun 11, 2002
Issued Date -
N/A
app pub date -
Nov 28, 2000
filing date -
Mar 28, 1996
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A turbine, adaptable to improve the survivability of fish present in water flowing therethrough, includes a hub and associated runner blades. Each blade comprises an inner edge and a distal outer edge, a leading edge and a trailing edge separated by a water directing surface. Each blade is rotatable relative to the hub about a blade rotational axis. The turbine is provided with a gap shielding device designed to shield a gap formed between the hub and the blade inner edge as the blade is rotated about its axis. The gap shielding device may comprise a plurality of independently biased pins, a plurality of fluid jets, a plurality of flexible members, a fluid-filled boot, and combinations thereof.
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