EP 2718063 A1 20140416 - PERCUSSION DEVICE OF ROCK BREAKING DEVICE AND METHOD FOR CONTROLLING PERCUSSION DEVICE
Title (en)
PERCUSSION DEVICE OF ROCK BREAKING DEVICE AND METHOD FOR CONTROLLING PERCUSSION DEVICE
Title (de)
SCHLAGVORRICHTUNG FÜR EINE GESTEINSZERTRÜMMERUNGSVORRICHTUNG UND VERFAHREN ZUR STEUERUNG DER SCHLAGVORRICHTUNG
Title (fr)
DISPOSITIF DE PERCUSSION DE DISPOSITIF D'ABATTAGE DE ROCHES ET PROCÉDÉ DE COMMANDE DE DISPOSITIF DE PERCUSSION
Publication
Application
Priority
- FI 20115549 A 20110607
- FI 2012050568 W 20120607
Abstract (en)
[origin: WO2012168559A1] The invention relates to a percussion device of a rock breaking device, a method for controlling the percussion device and a rock drilling unit. The percussion device (11) comprises a percussion piston (33), the work cycle of which is controlled by means of a control valve (40, 77). During the movement of the percussion piston, a pressure pulse is generated by closing a pressure connection (Y1, Y2) from at least one impulse space (44, 45) surrounding the percussion piston. The pressure pulse is used to change the position of the valve from one extreme position to an other. The impulse space is an annular space defined in a radial direction by the percussion piston and the frame (25).The frame is further provided with at least one impulse channel (58, 59) for transmitting a pressure pulse to the pressure surface of the control valve.
IPC 8 full level
E21B 1/26 (2006.01); B25D 9/12 (2006.01); B25D 9/18 (2006.01); B25D 9/20 (2006.01); B25D 9/26 (2006.01); E21B 1/02 (2006.01)
CPC (source: EP FI US)
B25D 9/12 (2013.01 - EP FI); B25D 9/18 (2013.01 - EP FI); B25D 9/20 (2013.01 - EP FI); B25D 9/26 (2013.01 - EP FI); E21B 1/38 (2020.05 - EP FI US); B25D 2209/005 (2013.01 - EP); B25D 2209/007 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012168559 A1 20121213; EP 2718063 A1 20140416; EP 2718063 A4 20141217; EP 2718063 B1 20170308; FI 123187 B 20121214; FI 20115549 A0 20110607
DOCDB simple family (application)
FI 2012050568 W 20120607; EP 12796938 A 20120607; FI 20115549 A 20110607