Patent ID: 8587165
Filing Date: 2013-11-19
Classification: F04D,H02K

Abstract:
1. A cooled fan motor comprising: a tankhead; an elongate housing attached to said tankhead, said housing having at least one longitudinally extending groove; a shaft rotatably attached to said housing; a hub attached to said shaft for rotation relative to the tankhead, said hub having at least one opening therethrough and shaped to form a gap with said tankhead; a rotor attached to said hub; a stator mounted on said housing such that said groove forms an air passage between said housing and said stator connecting said gap and said opening; and said hub including a plurality of radially extending fan blades, said fan blades positioned such that said gap is downstream of said fan blades, and said at least one opening is upstream of said fan blades; whereby rotation of said hub by said rotor causes said fan blades to displace ambient air such that said ambient air enters an interior of said hub through said gap downstream of said fan blades, flows from said gap along said air passage and exits said hub through said at least one opening upstream of said fan blades, thereby cooling an interior of said motor.