Percussion device with a transmission element compressing an...

Details Percussion device with a transmission element compressing an... Percussion device with a transmission element compressing an...

2007-06-26

2008-10-28

Nash, Brian D (Department: 3721)

Tool driving or impacting

Impacting devices

Selective axial direction of impact

C173S200000, C173S204000, C173S202000

Reexamination Certificate

active

07441608

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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