EP 1279793 A1 20030129 - Drill head
Title (en)
Drill head
Title (de)
Bohrkopf
Title (fr)
Tête de forage
Publication
Application
Priority
DE 10136468 A 20010726
Abstract (en)
The drill head (2), for drilling into the ground, has a threaded core which tapers to a leading point in a continuous screw. The outer circumference has a stepped contour, seen in cross section, with horizontal (12) and vertical (14) step surfaces. The screw forms a continuous threaded projection (16) at the outer circumference, with its under side (18) flush with a horizontal step surface in cross section. The upper side (20) of the threaded projection is at an acute angle to its under side. The threaded projection has a radial extension of 1-5% of the maximum diameter of the threaded core at 10-20 mm.
The drill head (2), for drilling into the ground, has a threaded core which tapers to a leading point in a continuous screw. The outer circumference has a stepped contour, seen in cross section, with horizontal (12) and vertical (14) step surfaces. The screw forms a continuous threaded projection (16) at the outer circumference, with its under side (18) flush with a horizontal step surface in cross section. The upper side (20) of the threaded projection is at an acute angle to its under side. The threaded projection has a radial extension of 1-5% of the maximum diameter of the threaded core at 10-20 mm.
Abstract (de)
Ein Bohrkopf weist einen Gewindekern auf, der sich von einem größeren Durchmesser an seinem hinteren Ende zu einer Spitze an seinem vorderen Ende kontinuierlich schraubenförmig verjüngt, so daß der Außenumfang des Gewindekerns im Querschnitt gesehen eine stufenförmige Kontur mit horizontalen und vertikalen Stufenflächen bildet. Am Außenumfang des Gewindekerns ist eine umlaufende Nase vorgesehen.
IPC 1-7
IPC 8 full level
E02D 5/36 (2006.01); E21B 7/26 (2006.01); E21B 10/44 (2006.01)
CPC (source: EP US)
E02D 5/36 (2013.01 - EP); E21B 7/26 (2013.01 - EP US); E21B 10/44 (2013.01 - EP)
Citation (search report)
- [AD] DE 2936060 A1 19810402 - FUNDEX PVBA
- [A] DE 3235118 A1 19830407 - DN INZH STR INST [SU]
- [A] EP 1098064 A1 20010509 - CIE DU SOL [FR]
- [A] BE 746400 A
- [A] US 6033152 A 20000307 - BLUM KENNETH J [US]
- [A] DE 1193081 B 19650520 - FRANK ARNOLD NIX DIPL ING
- [A] FR 2215075 A6 19740819 - ATLAS FRANCE [FR]
Designated contracting state (EPC)
BE CH DE EE LI NL
DOCDB simple family (publication)
EP 1279793 A1 20030129; EP 1279793 B1 20040407; DE 10136468 A1 20030206; DE 50200332 D1 20040513
DOCDB simple family (application)
EP 02015007 A 20020704; DE 10136468 A 20010726; DE 50200332 T 20020704