Pumps – Motor driven – Electric or magnetic motor
Patent
1977-12-05
1979-04-24
Husar, C. J.
Pumps
Motor driven
Electric or magnetic motor
417366, F04B 4900
Patent
active
041509242
ABSTRACT:
An electromagnetic plunger pump capable of keeping its delivery pressure substantially constant when the value of a voltage applied thereto remains in the range of values within the tolerance limits of variations. In this pump, spring constants of a restoring spring and an auxiliary spring are selected and the positions of an electromagnetic coil, an electromagnetic plunger and an annular magnetic pole are fixed such that there exists a relationship 0.1<la/lb<1 between the distance lb between the magnetically neutral point of the electromagnetic coil and the magnetically neutral point of the electromagnetic plunger and the distance la between the upper end of the annular magnetic pole arranged below one end of the electromagnetic plunger and the lower end of the electromagnetic plunger. By this arrangement, it is possible to maintain the delivery pressure of the electromagnetic plunger pump in a stable range in spite of a variation in the value of the voltage applied thereto.
REFERENCES:
patent: 3468257 (1969-09-01), Kofink
patent: 3556684 (1971-01-01), Rouquette
patent: 3874822 (1975-04-01), Nakamura
patent: 3877840 (1975-04-01), Nakamura
patent: 3877841 (1975-04-01), Nakamura
patent: 3958902 (1976-05-01), Toyoda
patent: 4021152 (1977-05-01), Toyoda
Husar C. J.
Taisan Industrial Co., Ltd.
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