Retrievulator





The retrievulator is a block from the redpower mod. A retrievulator must be placed next to a powered Retriever to work. Inside the retrievulator gui, there are two sections: R and T. The side of the retrievulator that is next to the Retriever is the T side, and the R side is the output.

The retrievulator is able to continue supplying a chest next to its output with items from the retriever at its input, based on the number of items already in the output chest.

Source
http://www.youtube.com/watch?v=JTmfaqF4LU0