Electro-magnetic fluid pump

Details Electro-magnetic fluid pump Electro-magnetic fluid pump

1979-04-02

1981-04-14

Coe, Philip R.

Pumps

Motor driven

Electric or magnetic motor

417550, F04B 3504

Patent

active

042616891

ABSTRACT:
In the construction of an electro-magnetic fluid pump such as an air pump in which a piston assembly carrying an armature is driven for reciprocal axial movement due to operational combination of magnetic attraction generated by a stator core and mechanical spring repulsion for cyclic discharge of the fluid out of its piston chamber, the piston assembly is postively supported on both axial sides of the stator core and a pneumatic spring is incorporated within the piston assembly. Biased movement of the piston assembly and bias in the magnetic attraction are both successfully prevented in order to minimize undesirable abrasion of the piston assembly and its related parts.

REFERENCES:
patent: 4090816 (1978-05-01), Takahashi

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