What is another word for donkey pump?
Pronunciation: [dˈɒŋkɪ pˈʌmp] (IPA) 
The term "donkey pump" commonly refers to a type of oil well pump also known as a "throttle pump". However, there are several other ways to refer to this type of pump, including a "walking beam pump" or a "nodding donkey". The machine itself consists of a large beam that pivots back and forth, powered by a motor or engine to lift oil out of an oil well. The term "donkey pump" is thought to originate from the donkey-like movement of the beam. Other similar terms can be found in various cultures, such as the "pumping unit" or the "bobbing horsehead" used in the United States.
