Rock drill

Details Rock drill Rock drill

1992-08-17

1993-11-30

Britts, Ramon S.

Boring or penetrating the earth

Bit or bit element

With helical-conveying portion

408230, E21B 1044

Patent

active

052656888

ABSTRACT:
A rock drill has an axially extending shank (1) with a drill head (2) on one end. The drill head (2) has an end face (3) with a cutting blade (4) and cutting pins (5) extending outwardly from the end face in the drilling direction. The cutting blade (4) extends diametrically across the end face and projects radially outwardly from the drill head (2) and axially outwardly from the end face (3). The cutting pins (5) are arranged on a diameter of the drill head which forms an acute angle relative to the cutting blade (4). Due to the acute angle between the cutting pins and the diametrically arranged cutting blade, removal grooves extending axially from the end face can be enlarged.

REFERENCES:
patent: 3372763 (1968-03-01), Fischer
patent: 4210215 (1980-07-01), Peetz et al.
patent: 4393947 (1983-07-01), Lutze et al.
patent: 4852670 (1989-08-01), Peetz et al.
patent: 4883135 (1989-11-01), Moser et al.
patent: 4889200 (1989-12-01), Moser
patent: 4967885 (1990-11-01), Moser

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