Fan
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 24, 2015
Grant Date -
Nov 18, 2010
app pub date -
Oct 6, 2008
filing date -
Oct 4, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A fan includes a frame, rotor supported by this frame and having a central hub and a number of blades and a drive mechanism for rotatably driving the rotor, in addition to a ring to which the end zones of the blades are connected. The ring is assembled from two part-rings of the same form which each include a circular strip of sheet material, the free ends of which are mutually connected to form the outer surface of a truncated cone, and a third part-ring which mutually connects the inner edges of the first two part-rings. The end zones of the blades are connected to the third part-ring. The ring has a diameter of more than about 1.50 m. The number of blades amounts to at least eight. The blades are hollow and include a framework structure which is provided with a skin connected thereto.
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