| 摘要 |
This invention relates to improvements in valve-controlled apparatus used to deliver liquids from bottles, cans, and other containers. According to a recently developed system for mixing concentrates with a solvent, the concentrates are delivered from large containers to a mixing vessel by means of tubes which are connected to both the containers of concentrate and the mixing vessel. In order to replace an empty container, the tube is detached from the container, the container is disposed of, and a full container is reattached to the tube. During the interval of time that the container is being replaced, it frequently happens that residual concentrate in the tube leaks onto the floor where the concentrate-containing containers are located. This invention provides a system for storing and transferring liquid comprising a container (42) for storing liquids, a delivery tube assembly (5) for drawing liquids from said container and transferring said liquids to a second vessel, and, disposed at one end of said delivery tube assembly, a shut-off valve (16) that comprises a casing (20) having a first opening (23) at one end thereof for allowing liquid to enter said casing, a valve head (24) which is normally covering said opening, and a means (26) for biasing said valve head toward said first opening in order to cover same. The container has an actuating means (48), e.g. a projection, formed on or near the bottom portion thereof, which means actuates the valve head to allow the shut-off valve to open, thereby allowing liquid to be drawn into the first opening in the casing, pass through the casing, and then pass through a second opening (36) in the casing to enter the delivery tube assembly. When the delivery tube assembly and shut-off valve are removed from the container, the valve head closes over said first opening, thereby preventing residual liquid present in the delivery tube assembly for leaking from the tube. |
