![]() ![]() Until about 1958 when the mains water arrived, the hamlet of East Dundry just south of Bristol had three working rams – their noisy "thump" every minute or so resonated through the valley night and day: these rams served farms that needed much water for their dairy herds. Some of their installations still survived as of 2004, one such example being at the hamlet of Toller Whelme, in Dorset. ![]() Eastons had a good business supplying rams for water supply purposes to large country houses, farms, and village communities. They specialised in water supply and sewerage systems worldwide, as well as land drainage projects. The sons of Montgolfier obtained a British patent for an improved version in 1816, and this was acquired, together with Whitehurst's design, in 1820 by Josiah Easton, a Somerset-born engineer who had just moved to London.Įaston's firm, inherited by his son James (1796–1871), grew during the nineteenth century to become one of the more important engineering manufacturers in England, with a large works at Erith, Kent. His friend Matthew Boulton took out a British patent on his behalf in 1797. The first self-acting ram pump was invented by the Frenchman Joseph Michel Montgolfier (best known as a co-inventor of the hot air balloon) in 1796 for raising water in his paper mill at Voiron. He did not patent it, and details are obscure, but it is known to have had an air vessel. In 1783, he installed another in Ireland. In 1772, John Whitehurst of Cheshire, England, invented a manually controlled precursor of the hydraulic ram called the "pulsation engine" and installed the first one at Oulton, Cheshire to raise water to a height of 4.9 metres (16 ft). Through a first reservoir, filled by a channel from the Darro River, water emptied via a large vertical channel into a second reservoir beneath, creating a whirlpool that in turn propelled water through a much smaller pipe up six metres whilst most water drained into a second, slightly larger pipe. The Alhambra, built by Nasrid Sultan Ibn al-Ahmar of Granada beginning in 1238, used a hydram to raise water. Valve arrangement of the Papa hydraulic ram pump History Figure 1: A John Blake's hydram that drives a fountain at the Centre for Alternative Technology A ram pump in Vogn, Nordjylland, Denmark A hydraulic ram in Kajny, Warmia, Poland In this situation, the ram is often useful, since it requires no outside source of power other than the kinetic energy of flowing water. ![]() The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower and a need for pumping water to a destination higher in elevation than the source. The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. It takes in water at one " hydraulic head" (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate. For the piston-based actuator, see hydraulic cylinder.Ī hydraulic ram pump, ram pump, or hydram is a cyclic water pump powered by hydropower. For the vehicle extraction tool, see Hydraulic rescue tools. For motor-powered pump, see Plunger pump. This article is about the water-powered water pump. ![]()
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