Data from our experiences with one of these ram pumps is listed in Table 4 near the bottom of this document. Water-powered Pumping Another interesting article on hydraulic rams. Electricity All you need is a bike, a rope, and a pully. Designing a Hydraulic Ram Pump A hydraulic ram or impulse pump is a device which uses the energy of falling water to lift a lesser amount of water to a higher elevation than the source. There are only two moving parts, thus there is little to wear out.
Hydraulic rams are relatively economical to purchase and install.
One can be built with detailed plans and if properly installed, they will give many trouble-free years of service with no pumping costs. For these reasons, the hydraulic ram is an attractive solution where a large gravity flow exists. Now includes an English summary. Check this out. Interesting concept, and the text should be all you need if the wait is too much for you.