Patent ID: 7070010

Claim:
Drill bit with cutters ( 2 , 2 ′) located on its face, with a blind hole ( 5 ) for attaching the drill bit ( 1 ) to an anchor rod and with at least one channel ( 10 ) which emerges from the blind hole ( 5 ) and which discharges on the outside surface of the drill bit ( 1 ), the mouth ( 11 ) of the channel ( 10 ) being located in the drill bit ( 1 ) outside the face which is equipped with cutters ( 2 , 2 ′), the surface section ( 12 ) of the side surface ( 13 ) of the drill bit ( 1 ) in which the mouth ( 11 ) of the channel ( 10 ) is located, is arranged set back relative to the periphery of the face of the drill bit ( 1 ) in the direction to its axis ( 4 ) and is concavely curved, and the mouth ( 11 ) of the channel ( 10 ′) being located off-center in the concavely curved surface section ( 12 ) to the latter, wherein the mouth ( 11 ) of the channel ( 10 ′) is located in a concavely curved surface section ( 12 ) offset to its edge which is forward in the direction of rotation of the drill bit ( 1 ).