Power
The tools operate on the basis of hydraulic fluid pressure of up to 720 bar (10,000 psi), which must be provided from a power source. At present, there are three different means of generating the pressure. The most commonly used source is a separate power unit, a small petrol (gasoline) engine connected to a hydraulic pump. The hydraulic fluid is pressurised in the pump, and conveyed in a hose under pressure to the tool.
Alternative power sources are a small electrical pump in the tool powered by a heavy duty rechargeable battery, and a hand- or foot-operated pump also connected to the tool directly. These are useful for lighter-duty use and do not require the storage space taken up by the separate power unit and associated lengths of hose.
Read more about this topic: Hydraulic Rescue Tools
Famous quotes containing the word power:
“Only that type of story deserves to be called moral that shows us that one has the power within oneself to act, out of the conviction that there is something better, even against one’s own inclination.”
—Johann Wolfgang Von Goethe (1749–1832)
“My great panacea for making society at once better and more enjoyable would be to cultivate greater sincerity.”
—Frances Power Cobbe (1822–1904)
“There is a Restlessness springing from the consciousness of power not fully utilized, which must be present wherever there is unused power of whatever kind. This is the restlessness of the germ within the seed, struggling upward and downward towards its proper life. ... it is a striving full of pain, the cutting of tender flesh by the fetters of the captive as he struggles against their pitilessness.”
—Anna C. Brackett (1836–1911)