EP 1387923 B1 20060531 - DRILL BIT
Title (en)
DRILL BIT
Title (de)
BOHRKRONE
Title (fr)
COURONNE DE SONDAGE
Publication
Application
Priority
- AT 0200149 W 20020516
- AT 7892001 A 20010517
Abstract (en)
[origin: WO02092957A2] A drill bit (1) comprises, on its face, either only curved cutting edges (2) or a combination consisting of at least one straight cutting edge (2') and at least two curved cutting edges (2). The cutting edges (2,2') on the face of the drill bit (1) are arranged such that they start from the axis (4) of the drill bit (1) or end directly adjacent thereto. Three channels (10) start from a blind hole (5) serving to attach the drill bit (1) to an anchor rod of an injection boring anchor, and their openings (11) are not located in the area of the face of the drill bit (1) but are situated in the area of the lateral surface (13) of the same, said lateral surface conically expanding toward the cutting edges (2, 2'). The openings (11) of the channels (10) are placed in the area of concave recesses (12) of the lateral surface (13) of the drill bit (1) in such a manner that they are recessed with regard to the periphery of the face of the drill bit (1).
IPC 8 full level
E21B 10/36 (2006.01); E21B 10/38 (2006.01); E21B 10/58 (2006.01)
CPC (source: EP US)
E21B 10/36 (2013.01 - EP US); E21B 10/38 (2013.01 - EP US); E21B 10/58 (2013.01 - EP US)
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)
WO 02092957 A2 20021121; WO 02092957 A3 20030417; CA 2447223 A1 20021121; CA 2447223 C 20080401; CN 1608166 A 20050420; CN 1982646 A 20070620; CZ 20033075 A3 20040317; DE 50207010 D1 20060706; DK 1387923 T3 20060918; EP 1387923 A2 20040211; EP 1387923 B1 20060531; EP 1564365 A2 20050817; EP 1564365 A3 20070502; ES 2263815 T3 20061216; JP 2004529280 A 20040924; JP 3961959 B2 20070822; PL 197413 B1 20080331; PL 366519 A1 20050207; PT 1387923 E 20060929; US 2004134688 A1 20040715; US 2006032676 A1 20060216; US 7070010 B2 20060704; US 7231992 B2 20070619
DOCDB simple family (application)
AT 0200149 W 20020516; CA 2447223 A 20020516; CN 02809909 A 20020516; CN 200610168554 A 20020516; CZ 20033075 A 20020516; DE 50207010 T 20020516; DK 02769438 T 20020516; EP 02769438 A 20020516; EP 05010556 A 20020516; ES 02769438 T 20020516; JP 2002590205 A 20020516; PL 36651902 A 20020516; PT 02769438 T 20020516; US 25360305 A 20051020; US 47800703 A 20031117