Percussion device with a transmission element compressing an elastic energy storing material
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United States of America Patent
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Oct 28, 2008
Grant Date -
Oct 25, 2007
app pub date -
Jun 26, 2007
filing date -
May 8, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A percussion device for a rock drilling machine or the like, which includes providing an impact, i.e. a stress pulse, to a tool connected to the percussion device. The the stress pulse is provided by way of a stress element of liquid, which is supported to a body of the percussion device. The stress element is subjected to pressure and correspondingly the stress element is released abruptly, whereby the stress energy is discharged as a stress pulse to the tool in direct or indirect contact with the stress element.
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