Fluid reaction surfaces (i.e. – impellers) – Projecting blade axis offset from rotation axis
Patent
1996-12-19
2000-06-20
Kwon, John
Fluid reaction surfaces (i.e., impellers)
Projecting blade axis offset from rotation axis
416210, F04D 2938
Patent
active
060770430
ABSTRACT:
An impeller for a fan, with improved performance characteristics, has a central hub with a plurality of wings extending radially outwardly therefrom. The impeller also has a plurality of blades, such that each blade is attached in an extending manner from a corresponding one of the wings. When in combination with a fan having a motor, the motor imparts rotation to the impeller in a forward direction. Each blade is angled backwardly, at a selected angle, relative to its corresponding wing and the forward, rotational direction of the impeller. In an alternate embodiment, each wing of the hub has a first portion extending radially outward from the hub and a second, outer portion angled backwardly relative to the first portion of the wing and the forward direction of the impeller. A method of manufacture is provided.
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Hill D. Lee
Massali Hamid
Vanfossan Jimmy D.
Emerson Electric Co.
Kwon John
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