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US 4,399,380 AGranted
Air cooled wiper motor
AssigneeJidosha Denki Kogyo Kabushiki Kaisha
InventorKoki Hirano
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AssigneeJidosha Denki Kogyo Kabushiki Kaisha
InventorKoki Hirano
Estimating the term…
An air-cooled wiper motor having self-cooling fan for use in vehicles is disclosed. The wiper motor comprises a motor yoke, a rotatable armature shaft provided in the yoke, a reduction gear mechanism provided at one end of the armature shaft, a vehicle wiper blade connected to the armature shaft through the reduction gear mechanism and being swung reciprocally, a self-cooling fan provided to the other projected end of the armature shaft, a fan cover provided around the fan for forming a ventilation duct having a width not exceeding an outer diameter of the yoke in one diametrical direction between the cover and the outer diameter portion of the yoke, and a bearing having an inner race secured to the armature shaft and an outer race secured to a gear housing of the reduction gear mechanism thereby to hold thrust loads in both directions received by the armature shaft.
An air-cooled wiper motor comprising a motor yoke of the totally enclosed without any ventilation openings, an armature body of a revolving type provided therein, a rotatable armature shaft secured to the armature body, a reduction gear mechanism provided at one end of the armature shaft and connected to a vehicle wiper blade, a self-cooling fan provided to the other projected end of the armature fan provided to the other projected end of the armature shaft, and a fan cover provded around the fan for forming a pair of ventilation ducts between the cover and two diametrically opposed outer surface portions of the yoke for directing cooling air over the outer surface of the yoke parallel to said armature shaft, said ducts each having a limited width not exceeding the outer diameter of the yoke.
Dependencies are inferred from the claim text.