Expeller
The Century Dictionary and Cyclopedia
noun.
One who or that which expels.
the GNU version of the Collaborative International Dictionary of English
noun.
One who, or that which, expels.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
Anything that
expels
.
Word Usage
"The company also manufactures the Sundhara expeller which is based on a design supplied by the German organization FAKT."