hydraulic ram(redirected from Pulsation engine)
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1. A water pump in which the downward flow of naturally running water is intermittently halted by a valve so that the flow is forced upward through an open pipe into a reservoir.
2. The large output piston of a hydraulic press.
1. (Mechanical Engineering) any large device involving the displacement of a piston or plunger driven by fluid pressure
2. (Mechanical Engineering) a form of water pump utilizing the kinetic energy of running water to provide static pressure to raise water to a reservoir higher than the source