Rock drill

Details Rock drill Rock drill

1994-11-04

1996-01-09

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

1754201, E21B 1036, E21B 1044

Patent

active

054821240

ABSTRACT:
A rock drill for hammer drilling machines is proposed, which has a helical shank and a drill head which is connected thereto and on whose end face are arranged a main cutting tip inclined in the shape of a roof and also auxiliary cutting tips disposed transversely thereto. The drill head has two laterally opposite flats for the formation of drilling dust grooves. In plan view the drill head has a very largely rectangular shape in cross section, an acute angle .beta..sub.1 being enclosed between the main cutting tip and the trailing auxiliary cutting tips.

REFERENCES:
patent: 2976944 (1961-03-01), Bassinger
patent: 3198270 (1965-08-01), Horvath
patent: 4889200 (1989-12-01), Moser
patent: 4903787 (1990-02-01), Moser et al.
patent: 4951761 (1990-08-01), Peetz et al.

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