EP 1264048 A1 20021211 - DRILLING APPARATUS FOR HARD GROUND
Title (en)
DRILLING APPARATUS FOR HARD GROUND
Title (de)
VORRICHTUNG ZUM BOHREN IM HARTEM UNTERGRUND
Title (fr)
APPAREIL DE FORAGE EN TERRAIN DUR
Publication
Application
Priority
- FR 0100652 W 20010306
- FR 0003156 A 20000313
Abstract (en)
[origin: FR2806112A1] The tool consists of a frame (1) with two main vertical side surfaces (32) and cutting rotors (24, 26). During operation the frame can be anchored in the trench by a series of inflatable chambers (40) on the side surfaces of the frame which can apply a pressure to the side walls of the trench. The inflatable chambers are covered by a layer of a strong and flexible material, e.g. in strips fastened to the frame between the chambers, or a single rigid panel.
IPC 1-7
IPC 8 full level
E02F 5/02 (2006.01); E02D 17/13 (2006.01); E02F 3/20 (2006.01); E02F 3/22 (2006.01); E02F 3/18 (2006.01)
CPC (source: EP US)
E02D 17/13 (2013.01 - EP US); E02F 3/188 (2013.01 - EP US); E02F 3/205 (2013.01 - EP US); E02F 3/22 (2013.01 - EP US)
Citation (search report)
See references of WO 0168990A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
FR 2806112 A1 20010914; FR 2806112 B1 20020614; CA 2403184 A1 20010920; EP 1264048 A1 20021211; JP 2001288773 A 20011019; US 2003074810 A1 20030424; US 6839988 B2 20050111; WO 0168990 A1 20010920
DOCDB simple family (application)
FR 0003156 A 20000313; CA 2403184 A 20010306; EP 01913930 A 20010306; FR 0100652 W 20010306; JP 2001069032 A 20010312; US 22139102 A 20020911