Centrifugal-fan impeller, and method of its manufacture

Details Centrifugal-fan impeller, and method of its manufacture Centrifugal-fan impeller, and method of its manufacture

2007-09-04

2007-09-04

Kershteyn, Igor (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

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

Radially extending web or end plate

C416S19800R, C416S24100B, C029S889400

Reexamination Certificate

active

10907437

ABSTRACT:
A tiny-diameter, lengthwise extensive impeller utilized in an ultra-small centrifugal fan is molded by an injection molding operation. In order to avert difficulties attendant on injection-molding ultra-miniature parts, the thickness and length of a reinforcing ring on the tip of the impeller are set to within predetermined ranges. Further, the thickness of each of the vanes that constitute the impeller is made maximum where they join to the impeller ring section.

REFERENCES:
patent: 2652190 (1953-09-01), Meltzer et al.
patent: 3201032 (1965-08-01), Gelbard
patent: 3257071 (1966-06-01), Harris
patent: 3306529 (1967-02-01), Nelson
patent: 3536416 (1970-10-01), Glucksman
patent: 6095752 (2000-08-01), Gronier et al.
patent: 6893220 (2005-05-01), Eaton et al.

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