Blade and wing configuration

Details Blade and wing configuration Blade and wing configuration

2005-05-31

2005-05-31

Nguyen, Ninh H. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

C416S243000, C416S228000

Reexamination Certificate

active

06899525

ABSTRACT:
A blade or wing configuration has a leading edge and a trailing edge, and an upper surface and a lower surface extending from the leading edge to the trailing edge. At least one of the upper surface and the lower surface is formed with a curved segment and a straight segment. The curved segment starts from a starting point on the upper surface or the lower surface between the leading edge and the trailing edge and ends at the leading edge. The straight segment extends from the starting point to the trailing edge. A tangent at the leading edge is substantially parallel to the direction of movement and the straight segment forms an angle θ of approximately 30°-60° with respect to the direction of movement. The trailing edge can be formed with teeth.

REFERENCES:
patent: 2899128 (1959-08-01), Vaghi
patent: 4431376 (1984-02-01), Lubenstein et al.
patent: 6095457 (2000-08-01), Vanmoor
patent: 6164919 (2000-12-01), Vanmoor
patent: 6168384 (2001-01-01), Vanmoor

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