Electromagnetic fluid pump

Pumps – Motor driven – Resiliently mounted pump or motor

Patent

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Details

417413, F04B 4304

Patent

active

044065914

ABSTRACT:
An electromagnetic fluid pump comprising an electromagnet motor unit for producing a magnetic field of reversing polarity to drive a fluid pump unit to pump fluid such as air. The fluid pump unit comprises a generally cup-shaped pump casing having its open end closed by a flexible diaphragm to define a fluid pumping chamber. A permanent magnet is mounted on the diaphragm, and the pump unit is mounted directly on the electromagnet motor unit with the permanent magnet and the electromagnet motor unit positioned at opposite ends of the fluid pumping chamber. In operation, the reversing magnetic field alternately repels and attracts the permanent magnet to displace the diaphragm to expand and contract the volume of the fluid pumping chamber. Expansion of the fluid pumping chamber draws fluid into the chamber through an inlet port including a one-way valve, and contraction of the fluid pumping chamber expels the fluid from the chamber through an outlet port including a one-way valve. In one alternative embodiment, the pump casing and the motor unit are movably mounted in a pump housing for reciprocating movement toward and away from the reciprocating permanent magnet to increase pump output, whereas in another alternative embodiment two of the fluid pumps are connected back-to-back for relatively vibration-free reciprocation of their permanent magnets in equal and opposite directions.

REFERENCES:
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patent: 2930324 (1960-03-01), Toulmin
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patent: 3029743 (1962-04-01), Johns
patent: 3066611 (1962-12-01), Schwartmann et al.
patent: 3539276 (1970-11-01), Matsuura
patent: 3572980 (1971-03-01), Hollyday
patent: 3671151 (1972-06-01), Duke et al.
patent: 3842440 (1974-10-01), Karlson
patent: 4086036 (1978-04-01), Hagen et al.
patent: 4154559 (1979-05-01), Enomoto
patent: 4170439 (1979-10-01), Hase

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