| 摘要 |
<p>A vessel for automatically sustaining vegetation includes a lower container for storing a reservoir of liquid, an upper container for supporting the vegetation and receiving liquid from the lower container, and a flow regulator for controlling the flow of liquid to the vegetation. The upper container is engageable with the lower container and includes a stem, defining at least one passageway, for extending into the liquid. The flow regulator includes a member which defines a flow port and which is rotatably attached to the stem of the upper container and which is sealed by an O-ring. In one embodiment the flow regulator has its flow port shaped in a generally pentagonal shape. Since the passageway is generally round, there is a non-linear relationship between rotational movements of the flow regulator and the incremented areas of coincidence of the flow port and passageway. This improves precise metering of the fluid.</p> |
