Animal husbandry – Birdbath
Patent
1996-11-25
1998-07-28
Price, Thomas
Animal husbandry
Birdbath
A01K 700
Patent
active
057849986
ABSTRACT:
A valve assembly for a bowl includes a housing having a liquid-tight bulkhead at its base, so that the housing and the bulkhead define a chamber for containing liquid. The housing has a plurality of holes that are located above the bulkhead and positioned so that liquid in the chamber may flow through the holes and into the bowl. A supply tube, connected to an external source of the liquid, has an opening into the chamber for passage of the liquid from the external source into the chamber. A valve is adapted to be moved from an open position, which permits the flow of liquid from the external source into the chamber, to a closed position which stops the passage of liquid from the external source. A float within the chamber will rise and fall depending on the level of liquid in the chamber. The float is attached to the valve so that a rise in the liquid level in the chamber which raises the float to a predetermined level corresponding to the desired level of liquid in the bowl will tend to move the valve from an open position to a closed position. Closing of the valve is retarded as the liquid level in the chamber reaches the predetermined level by providing a cap for the housing having a vent hole. The cap is adapted to mate with the housing so as to permit the air in the chamber above the liquid level to be compressed as the level of liquid rises. The vent hole is sized so as to permit the air above the liquid level in the chamber to be vented from the chamber at a controlled rate as the air is compressed to retard the closing of the valve for a predetermined period so as to permit the liquid to flow into the bowl in a quantity greater than that required to fill the bowl to the desired level. A predetermined quantity of the liquid will overflow the bowl when the valve is actuated and before the valve is moved to a closed position.
REFERENCES:
patent: 3823692 (1974-07-01), Bowser
patent: 3995591 (1976-12-01), Garwood
patent: 4630569 (1986-12-01), Dieleman
patent: 5052343 (1991-10-01), Sushelnitski
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