PULSE MACHINE, METHOD FOR GENERATION OF MECHANICAL PULSES AND ROCK DRILL AND DRILLING RIG COMPRISING SUCH PULSE MACHINE
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United States of America Patent
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Issued Date -
Nov 5, 2009
app pub date -
Nov 5, 2007
filing date -
Nov 16, 2006
priority date (Note) -
Abandoned
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Abstract
According to one aspect of the invention hydraulic pressure pulses are created in a rock drill machine utilizing a rod (7, 7a, 7b) made of a magnetostrictive material arranged in one or more actuators (5, 5a, 5b), which exposes an impulse piston (3) in a pulse cylinder (1) to said hydraulic pressure pulses, whereby mechanical pressure pulses being transferred to a drill steel of the rock drill machine are generated in the impulse piston (3).
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