SE7310634L

An hydraulically powered impact device intended for rock drilling having a hydraulic fluid section for reciprocately powering an impact piston and a non-hydraulic section into which the impact piston as well as a drill stem adapter extend. The non-hydraulic section, which contains a flush medium sup...

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Bibliographic Details
Main Authors JOHANSSON S I, EKVALL C G B
Format Patent
LanguageEnglish
Published 03.02.1975
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
HAND TOOLS
MANIPULATORS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PERCUSSIVE TOOLS
PERFORMING OPERATIONS
PORTABLE POWER-DRIVEN TOOLS
TRANSPORTING
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Summary:An hydraulically powered impact device intended for rock drilling having a hydraulic fluid section for reciprocately powering an impact piston and a non-hydraulic section into which the impact piston as well as a drill stem adapter extend. The non-hydraulic section, which contains a flush medium supply chamber and a rotation transmitting chuck bushing, is connected to a pressure air source for establishing two separate pressure air barriers, the objects of which are to seal off, lubricate and cool the non-hydraulic section.
Bibliography:Application Number: SE19730010634