Fluid handling – Siphons – With flow starting – stopping or maintaining means
Reexamination Certificate
1999-06-16
2001-01-30
Michalsky, Gerald A. (Department: 3753)
Fluid handling
Siphons
With flow starting, stopping or maintaining means
C137S128000, C137S135000, C137S140000, C137S153000
Reexamination Certificate
active
06178984
ABSTRACT:
The present invention relates to a self-priming siphon combining capillary and siphon action, in particular but not exclusively a device for watering plants from a water reserve.
Devices are known utilizing the capillary action to remove water from a container. In this connection reference is made to the French Patent 791 997 which discloses a tube of inverted U-shape comprising an appropriately dimensioned body for capillary action. One of the legs of the U-shape is immersed in the water of a container. The water moves up by capillary action and progresses around the upper portion of the tube prior to moving down within the other leg of the U-tube. But in these known devices, the water is not supplied in a sufficient amount to fill the entire tube and to effect by its downward flow a suction capable of priming the siphon, and the water flow at the outlet of the device remains limited to the amount that can move up by capillary action toward the upper portion of the U-shaped tube, without achieving priming of the siphon. Thus, the output always remains low, since the water flowing down to the outlet does not contribute to suction of the water moving up to the bend of the U-shaped tube.
Currently there exists now watering device which combines at the same time the following advantages:
Watering
without energy supply
with an adjustable flow of 0 to several hundreds of liters per day,
with easy and automatic priming and re-priming of the siphon,
from any kind of reservoir (
2
), the level of which is higher than the point of flow.
The present invention aims to provide all these advantages.
In order to obtain these results, the invention functions according to the siphon principle.
The essential feature of the invention is that this siphon is primed by a small quantity of liquid brought by capillary action along a wick as far as the entrance of a pipe into which it can flow, causing suction.
REFERENCES:
patent: 2184025 (1939-12-01), Smith et al.
patent: 4124035 (1978-11-01), Rice
patent: 5006264 (1991-04-01), Acuna
patent: 791997 (1935-12-01), None
Baker, Jr. Thomas S.
Michalsky Gerald A.
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