EP 0985080 A1 20000315 - DRILLING TOOL, ESPECIALLY A ROCK DRILL
Title (en)
DRILLING TOOL, ESPECIALLY A ROCK DRILL
Title (de)
BOHRWERKZEUG, INSBESONDERE GESTEINSBOHRER
Title (fr)
OUTIL DE FORAGE, NOTAMMENT FLEURET A ROCHER
Publication
Application
Priority
- DE 9801358 W 19980515
- DE 19722518 A 19970530
Abstract (en)
[origin: DE19722518A1] The invention relates to a drilling tool, especially a rock drill. According to the invention, the helical stem consists of a polygonal rod without wings or ribs. Said rod is twisted to form a cutting twist. The clamping stem is configured for accommodation in a hammer drill machine.
IPC 1-7
IPC 8 full level
E21B 10/44 (2006.01)
CPC (source: EP)
E21B 10/445 (2013.01)
Citation (search report)
See references of WO 9854434A1
Designated contracting state (EPC)
DE DK FR GB IT
DOCDB simple family (publication)
DE 19722518 A1 19981203; CN 1094169 C 20021113; CN 1258334 A 20000628; EP 0985080 A1 20000315; JP 2002500713 A 20020108; WO 9854434 A1 19981203
DOCDB simple family (application)
DE 19722518 A 19970530; CN 98805638 A 19980515; DE 9801358 W 19980515; EP 98933546 A 19980515; JP 50008599 A 19980515