Low pressure fan with high-flow

Details Low pressure fan with high-flow Low pressure fan with high-flow

2007-03-06

2007-03-06

Nguyen, Ninh H. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

C416S203000, C416SDIG004

Reexamination Certificate

active

11034326

ABSTRACT:
A fan10has a hub12, a plurality of fan blades14attached to the hub at one end and extending outwardly from the hub, and a ring18concentric with the hub and coupled to tips16of the blades. Wherein a dimensionless radius (r/R) is defined from a center of the hub (r/R=0) radially outwardly, wherein each tip of the blades is r/R=1. A stagger angle is defined as an angle between an axis of rotation of the fan and a set angle of each fan blade, and C/R is a dimensionless chord length where C is chord. The fan is defined by values of r/R, C/R and stagger angle.

REFERENCES:
patent: 5244347 (1993-09-01), Gallivan et al.
patent: 5326225 (1994-07-01), Gallivan et al.
patent: 5906179 (1999-05-01), Capdevila
patent: 5957661 (1999-09-01), Hunt et al.
patent: 6065937 (2000-05-01), Hunt
patent: 6872052 (2005-03-01), Havel et al.
PCT International Search Report mailed May 12, 2005.
PCT Written Opinion, mailed May 12, 2005.

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