Boring or penetrating the earth – Bit or bit element – With helical-conveying portion
Patent
1997-12-05
2000-03-07
Neuder, William
Boring or penetrating the earth
Bit or bit element
With helical-conveying portion
175415, E21B 1058
Patent
active
060327499
ABSTRACT:
A drilling tool has a shank (1) at one end, a shaft (2) with two helical grooves (5, 6) and the shaft (2) extends from the shank to the other end of the drilling tool. A drill head (8), with a cutting plate (7) inserted in it, is located at the opposite end of the shaft (2) from the shank (1). The cutting plate (7) has a cutting tip (74) projecting axially outwardly from the drill head (8). The cutting plate has a dimension (B) extending perpendicularly to the axis of the drilling tool and the dimension (B) is greater than the diameter of the drill head (8). On the opposite sides of the cutting plate (7) there is a reinforcement section (71) projecting outwardly from the side of the cutting plate and spaced laterally from the ends of the grooves (5, 6) in the drill head.
REFERENCES:
patent: 4314616 (1982-02-01), Rauckhorst et al.
patent: 5492187 (1996-02-01), Neukirchen et al.
Batliner Rainer
Bongers-Ambrosius Hans-Werner
Geiger Harald
Knoller Anton
Sartor Dietmar
Hilti Aktiengesellschaft
Neuder William
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