Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Reexamination Certificate
2005-06-21
2005-06-21
Verdier, Christopher (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
C416S16900R, C416S228000, C416S237000, C416S238000, C416S242000, C416SDIG002, C416SDIG005, C415S119000
Reexamination Certificate
active
06908287
ABSTRACT:
Disclosed is an axial flow fan capable of achieving reduction of noise while having a high blowing efficiency compared to the power consumption of a motor adapted to drive the axial flow fan. The axial flow fan includes a hub, and a plurality of blades extending radially around the hub. Each blade has a sweep angle varying gradually from a backward angle at a root of the blade connected to the hub to a forward angle at a tip of the blade, while having a flow dispersion region having a plurality of regions where the sweep angle is alternately changed, at a region defined between a backward sweep angle region at the root of the blade and a forward sweep angle region at the tip of the blade. Each blade has a longitudinal cross section curved to have a wave structure between the root of the blade and the tip of the blade. The axial flow fan may further include a fan band connecting tips of the blades. The axial flow fan achieves reduction of blowing noise by receiving air in a dispersed state at the leading edge of each blade, discharging air in a dispersed state at the trailing edge of each blade, and offsetting turbulent flows of air by virtue of the wave-shaped longitudinal cross-sectional structure of each blade.
REFERENCES:
patent: 632740 (1899-09-01), Parker
patent: 4089618 (1978-05-01), Patel
patent: 4569631 (1986-02-01), Gray, III
patent: 4684324 (1987-08-01), Perosino
patent: 5603607 (1997-02-01), Kondo et al.
patent: 5906179 (1999-05-01), Capdevila
Cho Kyung Seok
Min Ok Ryul
Park Chang Ho
Halla Climate Control Corp.
Lowe Hauptman & Berner LLP
Verdier Christopher
LandOfFree
Axial flow fan does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Axial flow fan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Axial flow fan will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3482189