Arrangement for a telescope feeder of a rock-drilling machine

PCT No. PCT/FI96/00323 Sec. 371 Date Dec. 17, 1997 Sec. 102(e) Date Dec. 17, 1997 PCT Filed May 31, 1996 PCT Pub. No. WO97/01019 PCT Pub. Date Jan. 9, 1997An arrangement is provided for a telescope feeder of a rock-drilling machine, having two telescopic portions, between which is connected an exten...

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Bibliographic Details
Main Author HAEKKINEN; LEO
Format Patent
LanguageEnglish
Published 23.03.1999
Edition6
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:PCT No. PCT/FI96/00323 Sec. 371 Date Dec. 17, 1997 Sec. 102(e) Date Dec. 17, 1997 PCT Filed May 31, 1996 PCT Pub. No. WO97/01019 PCT Pub. Date Jan. 9, 1997An arrangement is provided for a telescope feeder of a rock-drilling machine, having two telescopic portions, between which is connected an extension cylinder so that the rock-drilling machine moves along one telescopic portion. The extension cylinder comprises a separate adjusting piston, which is mounted movably around the piston rod so that it can move irrespective of the piston of the extension cylinder. Three cylinder spaces are thus formed inside the extension cylinder and to each cylinder space is connected a separate channel for pressure medium, so that the adjusting piston can be displaced to a desired position.
Bibliography:Application Number: US19970973907