Title:
IMPACT DEVICE WITH A ROTABLE CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO2004073933
Kind Code:
A8
Abstract:
The invention relates to an impact device comprising a frame to which a tool is connectible, and between the frame and the tool a stress element (3) sup-ported to the frame of the impact device, and a hydraulic fluid space (6) and means for leading pressurized hydraulic fluid into and out of the hydraulic fluid space (6), respectively. The impact device comprises a rotatingly installed con-trol valve (5) having control channels (5b) for leading the hydraulic fluid inter-mittently from the hydraulic fluid space (6) to the return channel.
Inventors:
KESKINIVA MARKKU (FI)
MAEKI JORMA (FI)
ESKO MAURI (FI)
AHOLA ERKKI (FI)
MAEKI JORMA (FI)
ESKO MAURI (FI)
AHOLA ERKKI (FI)
Application Number:
PCT/FI2004/000082
Publication Date:
December 02, 2004
Filing Date:
February 23, 2004
Export Citation:
Assignee:
SANDVIK TAMROCK OY (FI)
KESKINIVA MARKKU (FI)
MAEKI JORMA (FI)
ESKO MAURI (FI)
AHOLA ERKKI (FI)
KESKINIVA MARKKU (FI)
MAEKI JORMA (FI)
ESKO MAURI (FI)
AHOLA ERKKI (FI)
International Classes:
B25D9/22; (IPC1-7): B25D9/22
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