Rock drill

Details Rock drill Rock drill

2005-03-22

2005-03-22

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

C175S323000, C175S394000, C175S427000, C175S430000

Reexamination Certificate

active

06868924

ABSTRACT:
A rock drill including a helical shank and a drill head. The drill head has an end face pointing in a feed direction and at least one roof-shaped carbide cutting element on the end face of the rock drill. The carbide cutting element extends transversely across the drill head and has cutting edges. The end face of the carbide cutting element has an additional chip space at least in front of the carbide cutting element and includes an encircling step to create the additional chip space in the feed direction.

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