Universal motor with a device for removing dust

Details Universal motor with a device for removing dust Universal motor with a device for removing dust

2007-06-28

2009-08-11

Zarroli, Michael C (Department: 2839)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S088000

Reexamination Certificate

active

07573174

ABSTRACT:
A universal motor (2) includes at least two carbon brushes (36) contacting the commutator (14), a ventilation device (12) for producing a cooling flow (K), and a dust protection arrangement for preventing penetration of material particles (M) into the commutation region (34) and including at least one guide member (26) that provides for delivering of the material particles (M) in the cooling flow (K), with the at least one guide member (26) having a smooth concave guide surface (28) located between the two carbon brushes (36) and extending adjacent to an outer surface (30) of the commutator (14) and toward a suction opening (22) connected with the cooling flow path (24).

REFERENCES:
patent: 5650683 (1997-07-01), Shiga et al.
patent: 6097128 (2000-08-01), Ko
patent: 6586855 (2003-07-01), Burger et al.
patent: 7102266 (2006-09-01), Coles
patent: 7132777 (2006-11-01), Finkenbinder et al.
patent: 2007/0159023 (2007-07-01), Eisert et al.
patent: 360229648 (1985-11-01), None

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