power takeoff

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A mechanism attached to a motor vehicle engine that supplies power to a nonvehicular device, such as a pump or pneumatic hammer.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a device that transfers power from an engine (as in a tractor or other motor vehicle) to another piece of equipment (as to a pump or jackhammer)