Direct drive motor
Patent 4853567 Issued on August 1, 1989. Estimated Expiration Date: 
February 17, 2008. 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.
February 17, 2008. 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 2647808 3462626 Stator construction for a permanent magnet-excited d-c machine Method of distributing load among stacked bearings Cross roller bearing Small sized fan motor Patent #: 4686400 InventorsAssigneeApplicationNo. 07/156780 filed on 02/17/1988US Classes:310/67R, Inbuilt or incorporated unit310/51, Vibration or noise suppression310/90, Bearing or air-gap adjustment or bearing lubrication384/619, Roller structure or orientation; plural axially spaced rows or tandem thrust384/620Resilient feature; adjustment or self-alignment means; assembling meansExaminersPrimary: Skudy, R.Attorney, Agent or FirmInternational ClassesH02K 37/20 (20060101)H02K 21/38 (20060101) H02K 29/06 (20060101) H02K 29/10 (20060101) H02K 21/00 (20060101) G05B 19/23 (20060101) G05B 19/19 (20060101) H02K 37/10 (20060101) H02K 5/173 (20060101) Foreign Application Priority Data1987-03-02 JPAbstractA direct drive motor for use with factory automation, wherein the motor is arranged to directly obtain rotary forces without using a final reduction gear. The direct drive motor has an inner stator, an outer rotor disposed outside the inner stator with a slight air gap formed therebetween, a cylindrical rotor hub to which the outer rotor hub is internally fixed and a bearing provided in an inner cylindrical portion of the rotor hub for rotatably supporting the rotor hub. | |
