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Current content: 155 519 367 patent documents

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123 361 new documents added

1 354 331 documents amended

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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

EP 0985080 A1 20000315 (DE)

Application

EP 98933546 A 19980515

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

E21B 10/44

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