exhauster

noun

1. One who exhausts or depletes.

   “One of the most insignificant-looking men I ever saw then became the destroyer of nations, the leveller of mountains, the exhauster of the ocean.”

2. Exhaust system.

   “There is, however, another inconvenience which can only be remedied by the use of a second exhauster, viz., the loss of pressure after the passage of the gas through the washer--a loss resulting from the obstacle presented by this appliance to the steady flow of the gas.”

   “The Westinghouse type CM.38 air compressor is mounted under the main frame and the Northey rotary type exhausters are fitted one on each side of the platform at No. 1 end; [...].”

3. A vacuum exhauster.

   “Each engine also drives an exhauster to create the vacuum for operating the brake, which is applied by cylinders of standard pattern.”

   “The vehicle is fitted with Westinghouse electro-pneumatic brake, and also a Northey exhauster with vacuum chamber and auxiliary reservoir adjacent to the guard's compartment for use when hauling vehicles equipped with vacuum brake gear.”