Patent ID: 7500581

Claim:
A method for extracting liquid from a container, the method comprising: threading a central shaft of a connection assembly to threaded opening of the container the central shaft disposed outside the container; passing a down tube comprising a piercing tip through the central shaft, piercing a seal covering the opening of the container using the piercing tip located adjacent an open end of the down tube; using a handle attached to the down tube to drive the piercing tip through the seal; passing the down tube into the container until the open end of the down tube is disposed below a liquid level in the container; tightening a compression fitting attached to the down tube around the central shaft to form an airtight seal between the down tube and the central shaft; connecting a top end of the down tube opposite the open end to a destination for the liquid; transferring the liquid form the container to the destination through the down tube using a source of vacuum at the destination to draw the liquid through the down tube; controlling the flow of liquid through the down tube using a valve; and monitoring the flow of liquid through the down tube using a flow indicator; wherein substantially all of the liquid is transferred from the container to the destination without tilting the container.