a chamber containing air, as in a pump, lifeboat, or organic body.
2.
Also called air cushion. a compartment of a hydraulic system containing air that by its elasticity equalizes the pressure and flow of liquid within the system.
Origin
1840-50
Examples from the web for air chamber
The firebox is shrouded at the sides, top and rear by a sheet steel convection air chamber.
When the total air flow is higher than the minimum system flow, the pressure in the mixed air chamber becomes more negative.
The waterway at the bottom is smaller than the air chamber above the clapper valve.
The sensor has an air chamber which is sealed at either end.