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Any of various types of jet pumps used to withdraw fluid materials from a space. Also known as eductor.
A device that ejects the finished casting from a mold.
A device in the breech mechanism of a gun, rifle, or other firearm which automatically throws out an empty cartridge case, or unfired cartridge, from the breech or receiver.



a device in which kinetic energy is transferred from a medium that is moving at high velocity to another medium. The energy is transferred as the media are mixed (seeJET APPARATUS). Ejectors are used in jet and vacuum pumps. They are widely used as mixers in the chemical and petroleum-refining industries.


Sokolov, E. Ia., and N. M. Zinger. Struinye apparaty, 2nd ed. Moscow, 1970.
Gubin, M. F., Iu. N. Gornostaev, and K. A. Liubitskii. Primenenie ezhektorov na gidroelektrostantsiiakh. Moscow, 1971.

ejector, ejector pump

1.A type of pump for ejecting liquid, as from a sump; induces fluid flow by entraining the liquid in the flow of a stream of air, steam, or water.
2. A cleanout, 1.

sump pump, ejector

sump pump
A pump used to remove the accumulated waste in a sump.


i. A form of jet pump used to transfer fluids from one location to another. Ejectors are normally used in the feeder or the main tank, in which the booster pump is installed to ensure that this tank is never empty. The ejectors suck in fuel from the other tanks.
ii. Any device to eject something (e.g., links of gun ammunition in a belt are ejected from the gun into the aircraft fuselage or the atmosphere by an ejector).
References in periodicals archive ?
The more slowly the carrier moves to the rear the better chance the ejector has to do its job, and the extractor, too.
Replace the bolt in the receiver, retract it fully and ensure the ejector extends correctly and reliably through the slot, whether the bolt is operated slowly or fast.
The Triple-Lock was also the first double action Smith & Wesson to have an enclosed or shrouded ejector rod.
Standard features: Twin clamping cylinders, NC9300T control; two ejectors operate independently for cycle-time savings.
Applications: Electrical/electronic encapsulation, conventional transfer molding Features: Soft close, electric heating, transfer velocity and pressure profiles, adjustable pressure, automatic ejectors, color touchscreen control, closed-loop control system.
80, code 14017, saliva ejectors (canula plastic for saliva ejector) flexible, transparent, core metal wire, disposable.
Code: 14017 saliva ejectors (plastic cannula for saliva ejectors), flexible, transparent, core metal wire, disposable, diameter of 6 mm and a length of not less than 12 cm bag of 100 units.
The part is separated from the core using ejectors, air, and/or a stripper plate.
Tenders are invited for Manufacturing,testing and supply of Stainless Steel 304L Steam Ejectors to BARC, Tarapur including collection of Free Issue Material from BARC, Tarapur.