Direct current motor
Patent 4439703 Issued on March 27, 1984. Estimated Expiration Date: 
March 27, 2001. 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.
March 27, 2001. 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 2303293 2394075 3576456 Direct current motor 4374337 InventorsAssigneeApplicationNo. 06/095985 filed on 11/20/1979US Classes:310/186, Interpole, compensating or neutralizing poles310/216Core featuresExaminersPrimary: Duggan, Donovan F.Attorney, Agent or FirmInternational ClassesH02K 23/24 (20060101)H02K 23/40 (20060101) H02K 23/02 (20060101) Foreign Application Priority Data1978-07-31 JPAbstractA direct current motor comprising: a yoke; an armature; a plurality of main magnetic poles equidistantly spaced around the inner circumference of the yoke, and each of which has a wide portion and a narrow portion, the air-gap between the armature and the main magnetic poles being narrow at the center and ends of the wide portion, and at the center of the narrow portion, and being wide at the intermediate of the wide portion, and at the ends of the narrow portion, and a plurality of interpoles, such as E-shaped interpoles, which are disposed at positions located between the adjacent narrow portions of the main magnetic poles. | |
