Global Patent Index - EP 1769131 B1

EP 1769131 B1 20111116 - DRILL HEAD FOR A GROUND-BORING DEVICE

Title (en)

DRILL HEAD FOR A GROUND-BORING DEVICE

Title (de)

BOHRKOPF FÜR EIN ERDBOHRGERÄT

Title (fr)

TETE DE FORAGE D'UN ENGIN A FORER LE SOL

Publication

EP 1769131 B1 20111116 (DE)

Application

EP 05772195 A 20050706

Priority

  • EP 2005007286 W 20050706
  • DE 102004032551 A 20040706
  • DE 102005031707 A 20050705

Abstract (en)

[origin: WO2006002997A1] The invention relates to a drill head for a ground-boring device that displaces earth on impact. Said drill head comprises at least three drill head sections (3, 4, 11). The first drill head section is provided with a shape that is optimized for loosening and guiding the device while the second section is optimized regarding radial displacement of the ground at a low resistance to movement and the third section is provided with a fixed connection to the housing of the ground-boring device. In order to obtain improved transmission of advancing forces to the ground and thus improved advancement of the ground-boring device, at least two of the drill head sections are embodied so as to be movable relative to each other along the longitudinal axis thereof.

IPC 8 full level

E21B 7/26 (2006.01); E21B 4/06 (2006.01); E21B 4/14 (2006.01)

CPC (source: EP US)

E21B 4/145 (2013.01 - EP); E21B 7/046 (2013.01 - EP US); E21B 7/26 (2013.01 - EP US)

Designated contracting state (EPC)

FR GB

DOCDB simple family (publication)

WO 2006002997 A1 20060112; AU 2005259407 A1 20060112; AU 2005259407 B2 20100909; EP 1769131 A1 20070404; EP 1769131 B1 20111116; US 2009211812 A1 20090827; US 7938205 B2 20110510

DOCDB simple family (application)

EP 2005007286 W 20050706; AU 2005259407 A 20050706; EP 05772195 A 20050706; US 57175105 A 20050706