Air'-chām'ber, n.

noun

n. A cavity containing air to act as a spring for equalizing the flow of a liquid in hydraulic machines.

The cut is a section of a locomotive pump. The water is drawn by the action of the plunger in the barrel B, through the feed-pipe C and the valves D (resting on the seats E, and held in place by the cages F), to the air-chamber A, in the top of which the air is compressed, forcing the water out of the delivery-pipe G beyond its middle position when the piston is at the end of its stroke. Clark.

A labeled sectional diagram of a vertical mechanical apparatus with a bulb-shaped upper chamber and side outlets.