
Getting Pumped: Pneumatics • Chapter 10 185
Surely you don’t want to move the tube from one port or the other to
operate the cylinder. It may work, but it’s not very practical.The LEGO valve has
been designed precisely for this task: It can direct the airflow coming from a
pump to any one of the two ports of a cylinder, while at the same time let the
pressure from the other chamber of the cylinder discharge ...