Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-12-23
1997-06-03
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310261, 310216, 74573R, H02N 122
Patent
active
056357788
ABSTRACT:
A motor for electric pumps which can easily prevent unbalance caused by the eccentricity of an armature shaft when the motor is in rotation by forming holes in a plurality of armature core sheets. In the motor for electric pumps with an armature shaft forming the spindle of the motor and being provided with an eccentric portion for driving a piston pump, hole portions are provided in a plurality of core sheets fit on the armature shaft. The hole portions are formed such that eccentricity of the armature shaft due to the eccentric portion can be offset. The hole portions are provided in positions where the unbalance caused by both the eccentric portion and the piston pump that is driven by the eccentric portion are offset, or at least the unbalance forces generated during rotation are minimized.
REFERENCES:
patent: 2236244 (1941-03-01), Cornelius
patent: 2675759 (1954-03-01), Yarger
patent: 3226579 (1965-12-01), Bygdnes
patent: 4012653 (1977-03-01), Shigeta et al.
patent: 4644201 (1987-02-01), Tani et al.
patent: 4836755 (1989-06-01), Nitche et al.
Patent Abstracts of Japan: vol. 011, No. 250, (M-616), 14 Aug. 1987, & JP-A-62 058067, Mar. 13, 1987.
Patent Abstracts of Japan: vol. 011, No. 250, (M-616), 14 Aug. 1987, & JP-A-62 058066, Mar. 13, 1987.
Fujita Toru
Hattori Kozo
Nishio Yukihiro
Sato Takashi
Nippondenso Co. Ltd.
Stephan Steven L.
Wallace, Jr. Michael
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