Fan for generating an air flow

Details Fan for generating an air flow Fan for generating an air flow

2007-09-24

2010-11-30

Kershteyn, Igor (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

C416S190000

Reexamination Certificate

active

07841832

ABSTRACT:
A weight adjustment portion is formed at an upper end of a hub to project radially inward. An approximately U-shaped balance clip is attached to the weight adjustment portion. A gap to be constantly ensured is formed axially between the weight adjustment portion and a rotor holder. For ensuring the gap, a plurality of seats are provided on the lower surface of the weight adjustment portion at regular circumferential intervals. The rotor holder is press-fitted to the hub until the rotor holder comes into contact with the seats. The upper surface of the weight adjustment portion is positioned lower than the uppermost portion of the hub, thereby preventing the balance clip projecting from the uppermost portion of the hub when the balance clip is attached to the weight adjustment portion.

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