Global Patent Index - EP 0979920 A2

EP 0979920 A2 2000-02-16 - Drill apparatus with twin impact system

Title (en)

Drill apparatus with twin impact system

Title (de)

Bohrvorrichtung mit Doppelschlagsystem

Title (fr)

Appareil de forage avec système d'impact double

Publication

EP 0979920 A2 (DE)

Application

EP 98121952 A

Priority

DE 19836389 A

Abstract (en)

The outer tube (2) can be activated by a striker part (8) displaceable longitudinally and arranged over the inner tube (3). The insert end (5) extending on both sides over the rotary mechanism has on the rotary striking mechanism side a compensation ring (10) which has a hardness below that of the tube material and the striker part. The compensation ring has a curved surface on both sides, corresponding to the abutting end piece (11) of the insert end. In the housing (9) on the curved surface of the compensation ring lubricating holes (12) are provided.

Abstract (de)

Eine Bohrvorrichtung 1 mit Doppelschlagsystem "TWIN-Impact" kann im Dauerbetrieb eingesetzt werden, wenn dem Einsteckende 5 drehschlagwerksseitig ein Ausgleichsring 10 zugeordnet ist, der eine unter der des Rohrmaterials bzw. des Schlagteils 8 liegende Härte und/oder eine dem angrenzenden Endstück 11 des Einsteckendes 5 angepasste und auftretende Kräfte ausgleichende Form und/oder Oberfläche 21, 22 aufweist. <IMAGE>

IPC 1-7 (main, further and additional classification)

E21B 6/00; E21B 17/02

IPC 8 full level (invention and additional information)

E21B 6/04 (2006.01); E21B 7/00 (2006.01); E21B 7/20 (2006.01); E21B 17/03 (2006.01)

CPC (invention and additional information)

E21B 17/03 (2013.01); E21B 6/04 (2013.01); E21B 7/002 (2013.01); E21B 7/20 (2013.01)

Citation (applicant)

DE 3503893 C1 19851024 - KLEMM BOHRTECH

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0979920 A2 20000216; EP 0979920 A3 20031210; EP 0979920 B1 20050302; AT 290155 T 20050315; CA 2268400 A1 20000212; DE 19836389 C1 20000413; US 6202763 B1 20010320

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