- air chamber
: a cavity filled with air: asa. : a cavity containing air to act by its elasticity as a spring for equalizing the flow of a liquid in a pump or other hydraulic machine — see hydraulic ram illustrationb. : one of the chambers in the nautilus or other chambered cephalopods
* * *1. 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.[1840-50]
* * *air chamber,any compartment filled with air, especially a trap in a pump or other hydraulic system to prevent excessive pressures when the pump is suddenly stopped or started.
Useful english dictionary. 2012.