Title (en)

ROCK DRILL BIT

Publication

EP 0226537 A3 19881123 (DE)

Application

EP 86810551 A 19861201

Priority

DE 3544433 A 19851216

Abstract (en)

[origin: US4765419A] An axially elongated rock drill includes an axially extending shank and a drill head on one end of the shank. The drill head has a drill face extending transversely of the axial direction of the rock drill. A hard metal cutting plate and hard metal cutting pins are set in the drill face. The cutting pins reduce the wear on the cutting plate and afford better support of the drill. The cutting pins are arranged, in part, parallel to the axis of the drill, and, in part, inclined to the drill axis. The cutting plate has a cutting edge which generates a cutting plane as the drill is rotated with the ends of the cutting pins projecting from the drill face being located in the generated cutting plane.

IPC 1-7

E21B 10/58; E21B 10/56; E21B 10/44

IPC 8 full level

E21B 10/46 (2006.01); E21B 10/44 (2006.01); E21B 10/56 (2006.01); E21B 10/58 (2006.01); E21C 35/18 (2006.01)

CPC (source: EP US)

E21B 10/445 (2013.01 - EP US); E21B 10/56 (2013.01 - EP US); E21B 10/58 (2013.01 - EP US)

Citation (search report)

• [Y] EP 0048908 A1 19820407 - HAWERA PROBST KG HARTMETALL [DE]
• [Y] DE 2601302 A1 19770721 - KARNEBOGEN RICHARD
• [A] DE 2510265 A1 19760916 - KARNEBOGEN RICHARD
• [AD] DE 2528003 A1 19770120 - KRUPP GMBH
• [A] DE 2856205 A1 19800710 - HILTI AG

Designated contracting state (EPC)

AT BE CH DE ES FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0226537 A2 19870624; EP 0226537 A3 19881123; EP 0226537 B1 19940608; AT E106985 T1 19940615; AU 587514 B2 19890817; AU 6647586 A 19870618; CA 1266651 A 19900313; DE 3544433 A1 19870619; DE 3544433 C2 19951214; DE 3689900 D1 19940714; DK 173050 B1 19991206; DK 603586 A 19870617; DK 603586 D0 19861215; ES 2056047 T3 19941001; FI 81295 B 19900629; FI 81295 C 19901010; FI 865068 A0 19861212; FI 865068 A 19870617; JP H0720386 U 19950411; JP H086865 Y2 19960228; JP S62141293 A 19870624; US 4765419 A 19880823

DOCDB simple family (application)

EP 86810551 A 19861201; AT 86810551 T 19861201; AU 6647586 A 19861212; CA 525421 A 19861216; DE 3544433 A 19851216; DE 3689900 T 19861201; DK 603586 A 19861215; ES 86810551 T 19861201; FI 865068 A 19861212; JP 29781386 A 19861216; JP 834794 U 19940712; US 94254186 A 19861216