Animal husbandry – Entomological culture device – Egg treatment – production – or storage
Patent
1990-03-28
1991-10-22
Swiatek, Robert P.
Animal husbandry
Entomological culture device
Egg treatment, production, or storage
119 5, 261 82, A01K 6300
Patent
active
050585290
ABSTRACT:
The present invention relates to an air-water switching unit which consists of an air-water switching chamber with a movable piston residing inside the chamber and separating air coming into the chamber through an air inlet at one side and water coming into the chamber through a water inlet at the other side of the chamber. An air-water outlet is located between the air inlet and the water inlet. The movement of the piston is controlled by the pressure difference between the air pressure on one side and the water pressure on the other side of the piston. The air mixing water pump according to the present invention comprises the air-water switching unit, an air pump connected to the air inlet of the air-water switching chamber of the air-water switching unit, water supply from the output of a water filter connected to the water inlet of the air-water switching chamber, and a PVC tube connected to the air-water outlet of the air-water switching chamber. The PVC tube goes back to the aquarium at the location above the water level. The present invention also includes the application of the air-water switching unit and the air mixing water pump system in a fountain aquarium and an aquagarden.
REFERENCES:
patent: 340824 (1886-04-01), Schmalz
patent: 1588840 (1926-06-01), King
patent: 2826993 (1958-03-01), McChesney
patent: 3269578 (1966-08-01), Lewis
patent: 3687580 (1972-08-01), Griffiths
patent: 3888210 (1975-06-01), Buss
patent: 4371321 (1983-02-01), Koblo et al.
patent: 4807565 (1989-02-01), Hawthorne
Manahan Todd #E.
Swiatek Robert P.
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