Power tool with motor air flow path control

Details Power tool with motor air flow path control Power tool with motor air flow path control

2008-08-18

2010-06-08

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S062000, C310S06000A

Reexamination Certificate

active

07732955

ABSTRACT:
In accordance with an aspect of the present disclosure, a power tool has an electric motor having a stator disposed in a field case. The stator has field coils having opposed axial ends that extend axially outwardly from opposed axial ends of a lamination stack of the stator. An armature is disposed in the stator and has a shaft on which a fan is disposed. There are gaps between the opposed axial ends of the respective field coils. The fan baffle includes an air direction member that extends into one of the gaps to direct air flow between the armature and the stator. In an aspect, the fan baffle includes a plurality of such members, one for each gap.

REFERENCES:
patent: 3109947 (1963-11-01), Thompson et al.
patent: 7157818 (2007-01-01), Jones
patent: 2004/0163831 (2004-08-01), Ortt et al.
patent: 2004/0217661 (2004-11-01), Frank et al.
patent: 2005/0191888 (2005-09-01), Ortt et al.
International Search Report and Written Opinion of the International Searching Authority for PCT/US2009/053986, Issued Apr. 5, 2010.

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