F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 29/28 (2006.01) F04D 29/42 (2006.01) F04D 29/70 (2006.01) H02K 5/00 (2006.01) H02K 7/14 (2006.01)
Patent
CA 2590090
A motor-driven fan assembly includes a bracket which couples to a motor assembly and includes an outlet port. A shroud assembly defines a first chamber and a second chamber and includes an inlet port, the shroud assembly is received on the bracket. A bearing-supported shaft is driven by the motor assembly, and extends through the bracket and into the shroud assembly. A first fan is coupled to the shaft and positioned in the first chamber. A second fan is coupled to the shaft and positioned in the second chamber. The first and second fan include a plurality of curved blades positioned between a flat disc and a cap, the cap defining a non-linear cross section. Rotation of the fans by the shaft results in air flow through the fan assembly. Dust is generally prevented from settling on the fan blades during operation, thereby preventing non-uniform dust buildup or breakup which may cause excessive vibration and reduce bearing and brush life.
Bennington Gene
Finkenbinder David B.
Ametek Inc.
Sim & Mcburney
LandOfFree
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