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:
“No picture of life can have any veracity that does not admit the odious facts. A man’s power is hooped in by a necessity which, by many experiments, he touches on every side until he learns its arc.”
—Ralph Waldo Emerson (1803–1882)
“Do not doubt a woman’s power to aid; no toil
Can daunt a pure affection.”
—Silius Italicus (26–101)
“Who can measure the advantages that would result if the magnificent abilities of these women could be devoted to the needs of government, society and home, instead of being consumed in the struggle to obtain their birthright of individual freedom? Until this be gained we can never know, we can not even prophesy the capacity and power of women for the uplifting of humanity.”
—Susan B. Anthony (1820–1906)