Variable geometry inlet for a ducted fan and method of assembling same
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United States of America Patent
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Mar 29, 2016
Grant Date -
Mar 3, 2016
app pub date -
Aug 26, 2014
filing date -
Aug 26, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A variable geometry inlet for a ducted fan is selectively transitionable between a first and second mode. The inlet includes a retractable ring that extends circumferentially about the inlet and is selectively movable between an axially extended position in the first mode and an axially retracted position in the second mode. A tube extends circumferentially proximate the retractable ring, and is pressurizable to a relatively deflated state in the first mode and to a relatively inflated state in the second mode. A stretchable skin extends circumferentially proximate the retractable ring, and is elastically deformable in at least a circumferential direction about a longitudinal axis of the fan. A leading edge of the inlet in the first mode is defined by the stretchable skin disposed against a forward edge of the retractable ring, and in the second mode by the stretchable skin disposed against at least a portion of the tube.
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