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...

2007-08-07

2007-08-07

Nash, Brian D. (Department: 3721)

Tool driving or impacting

Impacting devices

Selective axial direction of impact

C173S200000, C173S204000, C173S202000

Reexamination Certificate

active

10982893

ABSTRACT:
A percussion device for a rock drilling machine or the like, which comprises means for providing an impact, i.e. a stress pulse, to a tool connected to the percussion device. The means for proving the stress pulse include a stress element (4) of liquid, which is supported to a body (2) of the percussion device and means for subjecting the stress element to pressure and correspondingly for releasing the stress element (4) 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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patent: 7013996 (2006-03-01), Keshiniva et al.
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Database WPI, Week 197947, Derwent Publications, Ltd., London, AN 1979-K9217B, Abstract of SU 648726.

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