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:
“He had come down, He said, to clean the earth
Of the dirtiness of war.
Now tell of why His power failed Him there?
His power did not fail. It was that, simply,
He found how much the people wanted war.”
—Gwendolyn Brooks (b. 1917)
“Suddenly I realized the power I held, the power to rule, to make the world grovel at my feet. We’ll soon put the world right now, Kemp. You and I.”
—R.C. Sherriff (1896–1975)
“I have agreed to go into the service for the war ... [feeling] that this was a just and necessary war and that it demanded the whole power of the country; that I would prefer to go into it if I knew I was to die or be killed in the course of it, than to live through and after it without taking any part in it.”
—Rutherford Birchard Hayes (1822–1893)