| 摘要 |
A fluid conduit formed of a hollow tube attached at one end to a container of fluid is provided at the other end with an end cap in which is formed a fluid discharge opening through which to transfer fluid. A slide valve on the exterior of the conduit is biased into a closed position, precluding fluid transfer until the discharge opening is inside a receiving vessel. An air vent tube within the conduit communicates between the interior of the container and the exterior of the fluid conduit and admits air into the container to facilitate even-flowing transfers after the transfer of an initial quality of fluid without the admission of air into the container reduces the air pressure therein sufficiently below ambient pressure to curtail further fluid transfer. Fluid filling a receiving container closes entry to the air vent tube when the receiving vessel is filled, terminating air flow into the container and stopping fluid flow through the conduit. The air vent tube includes one or more capillary sections of reduced inner diameter relative that of the air vent tube. A seal is provided for closing entry to the air vent tube when the slide valve is in its closed position, and a relief passageway with a one-way valve communicates between the air tube and the exterior of the fluid conduit to permit fluid to drain from the vent tube following each fluid transfer. |
