LIQUID DISPENSING DEVICES PARTICULARY USEFUL FOR IRRRIGATING PLANTS

摘要

A liquid dispensing device, includes a container for holding a supply of a liquid to be dispensed; a liquid feed tube having one end exposed to the interior of one end of the container for feeding liquid by gravity through the opposite end of the liquid feed tube when the container is inverted with the one end of the container facing downwardly and the opposite end of the liquid feed tube located at a lower elevation than the level of the liquid in the container; an air inlet leading from the atmosphere into the interior of the one end of the container so as to be immersed by the liquid therein when the container is filled with a liquid and inverted; and an air inlet control device effective, when the container is inverted, to block the outflow of liquid from the interior of the container via the air inlet, but to permit atmospheric air to enter, via the air inlet into the interior of the container at a very slow rate and to bubble through the liquid within the container, whereby dispensing of the liquid from the container via the liquid feed tube is also effected at a very slow rate.