Global Patent Index - EP 1083294 B1

EP 1083294 B1 20051228 - Drilling tool

Title (en)

Drilling tool

Title (de)

Bohrwerkzeug

Title (fr)

Outil de forage

Publication

EP 1083294 B1 20051228 (DE)

Application

EP 00810787 A 20000901

Priority

DE 19942987 A 19990909

Abstract (en)

[origin: EP1083294A1] The drilling tool has a shaft (2) with at least two spiral conveying grooves (3,4) for dust and a drill head (5) with cutters (7-9) of hard metal, which project radially from the edge of the drill head and are separated by grooves (10,12) for boring dust. There are more grooves for boring dust than there are conveying grooves into which they open. At least one groove pair (10,12) opens into a common conveying groove (4). The groove pair is connected to the conveying groove by a spiral groove section (13), whose cross-section is smaller than the common conveying groove.

IPC 1-7

E21B 10/44

IPC 8 full level

B23B 51/00 (2006.01); E21B 10/00 (2006.01); B28D 1/14 (2006.01); E21B 10/40 (2006.01); E21B 10/44 (2006.01); E21B 10/58 (2006.01)

CPC (source: EP US)

E21B 10/40 (2013.01 - EP US); E21B 10/445 (2013.01 - EP US); E21B 10/58 (2013.01 - EP US)

Designated contracting state (EPC)

CH DE DK FR GB LI NL

DOCDB simple family (publication)

EP 1083294 A1 20010314; EP 1083294 B1 20051228; DE 19942987 A1 20010315; DE 50011953 D1 20060202; DK 1083294 T3 20060515; JP 2001105219 A 20010417; JP 4676051 B2 20110427; US 6431295 B1 20020813

DOCDB simple family (application)

EP 00810787 A 20000901; DE 19942987 A 19990909; DE 50011953 T 20000901; DK 00810787 T 20000901; JP 2000272904 A 20000908; US 65687100 A 20000907