Small size electric motor
Patent 5138208 Issued on August 11, 1992. Estimated Expiration Date: 
June 18, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 18, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3685926 Casing for motors having a spherical air gap Stator winding mounting for an electric motor Cooling apparatus for electrical machinery External rotor motor with screwed on motor flange End frame and stator assembly for a dynamoelectric machine Small electric motor Patent #: 4866317 InventorsAssigneeApplicationNo. 717153 filed on 06/18/1991US Classes:310/64, Heat-exchange structure310/43, Molded plastic310/89Housings, windows or coversExaminersPrimary: Stephan, Steven L.Assistant: LaBalle, C. Attorney, Agent or FirmForeign Patent References
International ClassesH02K 005/18H02K 005/02 Foreign Application Priority Data1990-06-20 JPAbstractA small size electric motor comprises a motor housing having a built-in stator and secured to a supporting member. The motor housing is made of a synthetic resin and has a substantially tubular heat conductive plate embedded in a portion thereof which is attached to the supporting member. The heat conductive plate is made of a metallic material, and its inner peripheral portion is projecting toward the inner side of the housing so that the heat conductive plate is brought into contact with the stator, and its outer peripheral portion is exposed to the surface to which the supporting member is attached so that the heat conductive plate is brought into contact with the supporting member. Therefore, the heat generated by the motor is radiated while transmitted from the stator to the supporting member through the heat conductive plate. | |
