Global Patent Index - EP 0862678 B1

EP 0862678 B1 20000105 - DRILL BIT

Title (en)

DRILL BIT

Title (de)

BOHRKRONE

Title (fr)

COURONNE DE FLEURET

Publication

EP 0862678 B1 (DE)

Application

EP 96939744 A

Priority

  • AT 9600234 W
  • AT 64195 U

Abstract (en)

[origin: WO9719247A1] Described is a drill bit (1), in particulare a bit for a percussion or rotary-percussion drill, the tip of the bit having cutting edges (3, 4) designed to detach and/or break up the material to be removed, at least one cutting edge (4) running in a curve radially across the face (2) of the bit. The invention calls for at least one additional, straight, cutting edge (3) located on the convex side of the curved cutting edge (4).

IPC 1-7

E21B 10/36

IPC 8 full level

E21B 10/36 (2006.01)

CPC (source: EP)

E21B 10/36 (2013.01)

Designated contracting state (EPC)

AT BE CH DE ES FI FR GB GR IT LI NL PT SE

DOCDB simple family (publication)

WO 9719247 A1 19970529; AT 1513 U1 19970625; AT 188535 T 20000115; AU 7684996 A 19970611; CZ 155998 A3 19980916; CZ 290060 B6 20020515; DE 59604134 D1 20000210; EP 0862678 A1 19980909; EP 0862678 B1 20000105; ES 2143244 T3 20000501; GR 3033073 T3 20000831; PL 180429 B1 20010228; PL 326764 A1 19981026; PT 862678 E 20000630

DOCDB simple family (application)

AT 9600234 W 19961122; AT 64195 U 19951123; AT 96939744 T 19961122; AU 7684996 A 19961122; CZ 155998 A 19961122; DE 59604134 A 19961122; EP 96939744 A 19961122; ES 96939744 T 19961122; GR 20000400762 T 20000327; PL 32676496 A 19961122; PT 96939744 T 19961122