EP 0985081 B1 20021113 - METHOD OF MANUFACTURE OF A ROCK DRILL
Title (en)
METHOD OF MANUFACTURE OF A ROCK DRILL
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES GESTEINBOHRERS
Title (fr)
METHODE DE FABRICATION D'UN FLEURET A ROCHER
Publication
Application
Priority
- DE 9801377 W 19980515
- DE 19722517 A 19970530
Abstract (en)
[origin: DE19722517A1] The invention relates to a drilling tool, especially a rock drill, comprising a drill head, a clamping stem, and a helical stem situated in-between. The aim of the invention is to provide an economical drilling tool. To this end, the base element is a polygonal rod which is twisted in the area of the helical stem.
IPC 1-7
IPC 8 full level
E21B 10/44 (2006.01)
CPC (source: EP)
E21B 10/445 (2013.01)
Designated contracting state (EPC)
DE DK FR GB IT
DOCDB simple family (publication)
DE 19722517 A1 19981203; CN 1259189 A 20000705; DE 59806280 D1 20021219; DK 0985081 T3 20030217; EP 0985081 A1 20000315; EP 0985081 B1 20021113; WO 9854436 A1 19981203
DOCDB simple family (application)
DE 19722517 A 19970530; CN 98805670 A 19980515; DE 59806280 T 19980515; DE 9801377 W 19980515; DK 98934749 T 19980515; EP 98934749 A 19980515