from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One that impels, as a rotating device used to force a fluid in a desired direction under pressure.
- n. A rotor or rotor blade.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Something which or someone who impels, usually a part of a pump.
from the GNU version of the Collaborative International Dictionary of English
- n. One who, or that which, impels.
from The Century Dictionary and Cyclopedia
- n. One who or that which impels.
- n. Specifically, the revolving wheel or pumping element of a centrifugal fan or pump.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the blade of a rotor (as in the compressor of a jet engine)
Sorry, no etymologies found.
In these pumps, the impeller is a wheel with blades radiating from the centre to the periphery which, when rotated at high speed, impart movement to the water and produce an outward flow due to centrifugal forces; the angle between the direction of entry and exit of water flow is 90 degrees.
The only moving component within the pump is the impeller, which is levitated and rotated within the pump chamber in a contact-free manner.
The impeller is the device that creates suction and if it becomes damaged, you have to replace your sump pump.
The impeller can rotate even when the machine is off.
Two-stage gas snow blowers Two-stage gas-powered snow blowers feature wider augers and a spinning impeller that can handle deeper snow.
Certainly if the poop hits the air impeller and he needs his neighbors co-operation he'll have a harder time getting it.
But it is rude and disingenuous for you to block the activities of those of us who expect to stick around when we try to do something about the poop we might happen to perceive nearing the air impeller.
I do occasionally do paintball, because I see it as training, you can't practically get any other way, but I am a martial artist as well as a veteran, so life is training and training is life, especially when the poop hits the air impeller and you need the trained reflexes to handle the emergency.
As some doubtless already know, this will immediately overheat and cook the water-pump impeller.
I remind myself though, that the future has always been uncertain, change is always certain, and I have survived the poop hitting the air impeller before.