EP 1860274 A1 20071128 - Drill bit
Title (en)
Drill bit
Title (de)
Bohrspitze
Title (fr)
Pointe de forage
Publication
Application
Priority
EP 06008686 A 20060426
Abstract (en)
The tip (10) of a soil boring drill has at least two curved plates (12), extending radially outwards from the drill axis (14) with a decreasing axial height radially outwards. The plates have the same curvature radius, especially as segments of a cylindrical tube.
Abstract (de)
Die Erfindung betrifft eine Bohrspitze für einen Erdbohrer, bei dem mindestens zwei gebogene Platten vorgesehen sind. Diese erstrecken sich von einer Bohrachse radial nach außen, wobei die axiale Höhe radial nach außen abnimmt.
IPC 8 full level
E21B 10/42 (2006.01); E21B 10/44 (2006.01)
CPC (source: EP US)
E21B 10/42 (2013.01 - US); E21B 10/44 (2013.01 - EP US)
Citation (search report)
- [X] DE 8908131 U1 19901031
- [X] US 2973821 A 19610307 - ANDREAS STIHL
- [X] US 3786876 A 19740122 - AALTONEN A
- [X] DE 1263652 B 19680321 - HIBERNIA AG
- [X] WO 9841697 A1 19980924 - MATI MIRO CESARE [IT]
- [A] US 3763942 A 19731009 - LEVITT M
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1860274 A1 20071128; EP 1860274 B1 20080702; AT E399926 T1 20080715; CN 101063402 A 20071031; DE 502006001030 D1 20080814; ES 2308627 T3 20081201; JP 2007291847 A 20071108; JP 4654215 B2 20110316; PT 1860274 E 20080731; US 2008035385 A1 20080214; US 7571781 B2 20090811
DOCDB simple family (application)
EP 06008686 A 20060426; AT 06008686 T 20060426; CN 200710101101 A 20070426; DE 502006001030 T 20060426; ES 06008686 T 20060426; JP 2007112475 A 20070423; PT 06008686 T 20060426; US 79037307 A 20070425