US 2009/0015082 A1 · Electric Motor and Method of Producing Electric Motor

Abstract

In a fan motor 1 for a vehicle, when opening a vent hole 11 in a cylinder bottom portion 2a of a yoke 2 of the fan motor 1, this is performed so that the opening part cannot be visually observed when the vent hole 11 is viewed head on. The vent hole 11 is formed by dividing the same at a laterally long dividing line so that, at a dividing line X having an angular shape whose left-right direction central portion intrudes into the side of a vent hole upper half portion 12, the upper half portion 12 has a spherical shape that bulges out to the outside of a bottom surface as it is further at the lower side and thus has an inside and outside staggered form with respect to a lower half portion 13.

Claims19

Dependent claims

An electric motor, comprising:

a yoke having a cylindrical form and vent hole at a cylinder bottom portion of the yoke, wherein:
the vent hole is formed at the cylinder bottom portion by forming an upper half portion of the vent hole by cutting and stretching out toward an outside of the yoke with respect to a lower half portion so as to bulge out of the cylinder bottom portion.

Dependencies are inferred from the claim text.

Facts

Application

11/920,765Filed 19 May 2006

Priority

JP 2005-15272725 May 2005

Published

15 Jan 2009

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02K 5/10
Casings or enclosures characterised by the shape, form or construction thereof: with arrangements for protection from ingress, e.g. water or fingers
H02K 5/207
With channels or ducts for flow of cooling medium: with openings in the casing specially adapted for ambient air
Y10T 29/49009
Electrical device making: dynamoelectric machine
H02K
Dynamo-electric machines

Electric Motor and Method of Producing Electric Motor

Life of this patent

Electric Motor and Method of Producing Electric Motor

Life of this patent

Abstract

Claims19