Drilling head of a rock drill

Details Drilling head of a rock drill Drilling head of a rock drill

2005-01-18

2005-01-18

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

C175S401000, C175S420100

Reexamination Certificate

active

06843334

ABSTRACT:
A drilling head of a rock drill for use with a hand-held power tool is formed completely of a hard material and includes a main bit (2) and at least one auxiliary bit (3a, 3b). The at least one auxiliary bit (3a, 3b) is provided exclusively in a radially outer region of the drilling head and has an arcuate cutting edge (4a, 4b).

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