Air pump for aquarium

Details Air pump for aquarium Air pump for aquarium

1986-07-16

1988-04-12

Duggan, Donovan F.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

310 29, 310 36, H02K 3312

Patent

active

047376953

ABSTRACT:
An air pump for an aquarium includes a power source, first and second electromagnetic coils, and a circuit powered by the power source and coupled to the coils for energizing the coils in an alternating manner at a selected frequency, the circuit including an arrangement for varying the selected frequency. The air pump also includes a mechanical pump mechanism having two magnets which are each movably supported near a respective one of the coils and move in response to energization of the coils, and a pump arrangement which is responsive to movement of the magnets for effecting flow of a fluid.

REFERENCES:
patent: 3134938 (1964-05-01), Morgan
patent: 3509437 (1970-04-01), Hashimura
patent: 3538704 (1970-11-01), Kawanaka et al.
patent: 4565497 (1986-01-01), Miller
patent: 4636695 (1987-01-01), Tsai

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