Method for driving a support into a ground surface by means of a pile-driving device, and a pile-driving device for use with such a method
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United States of America Patent
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Jul 31, 2012
Grant Date -
Jan 28, 2010
app pub date -
Mar 6, 2008
filing date -
Mar 9, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and pile-driving device for driving a support into a ground surface. The device comprises a cylinder, an anvil which closes the lower side of the cylinder at least substantially, a ram which is movable as a piston above the anvil within the cylinder, and an injection device for injecting fuel into a combustion chamber between the anvil and the ram. The device has adjusting means for adjusting the moment of fuel injection and/or the amount of fuel to be injected. The method includes: causing the ram to move downward; injecting fuel into the combustion chamber; causing the fuel to combust for driving the ram upward, in such a manner that said combustion occurs before the ram strikes the anvil, wherein the moment of fuel injection and/or the amount of fuel to be injected is/are adjusted in dependence on at least one variable.
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