and pushes the discharge valve open. The air moves from the discharge port to the tank. With each stroke, more air enters the tank and the pressure rises. The tank is designed to hold a quantity of air within a preset pressure range, and the motor turns on and off to automatically maintain pressure in the tank.
From the human lung, to bellows to modern compressors, some form of compressed air has been around and used for a long time, and the steps of its evolution has been fairly simple. And though we are not forging swords, many of us find portable air compressors an indispensable part of our tool collection.
MJ writes for ClickShops Inc., where you can find a great selection of portable air compressors at http://www.aircompressors.us.com/.
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