MALE PORTION, DRILL BIT AND THREADED JOINT FOR PERCUSSIVE ROCK DRILLING

According to the present invention a male portion (10) for percussive rock drilling is provided comprising sections of reduced cross-sectional areas, a t least one thread (12) for percussive rock drilling provided at a portion (16 ) at an end of the male portion. The end of the male portion comprise...

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Bibliographische Detailangaben
Hauptverfasser:	LILJEBRAND, PER-OLOF, LUNDBERG, CHRISTER, BRUNGS, ANDERS, CARLSTROEM, BO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HAND TOOLS HEATING LIGHTING MANIPULATORS MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERCUSSIVE TOOLS PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	According to the present invention a male portion (10) for percussive rock drilling is provided comprising sections of reduced cross-sectional areas, a t least one thread (12) for percussive rock drilling provided at a portion (16 ) at an end of the male portion. The end of the male portion comprises an abutment surface (14) for transfer of impact waves. The length (L) of the portion (16) is defined as the length of a cylinder (C), from a plane (P) of the impact surface, that touches the external diameter (Dy) of the thread, wherein said length (L) divided by the external diameter of the cylinder lie s within the interval of 1-2. The intervention further relates to a drill bit and a threaded joint.