Hard metal plate for rock drill and rock drill

Details Hard metal plate for rock drill and rock drill Hard metal plate for rock drill and rock drill

2011-03-08

2011-03-08

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Impact or percussion type

C175S415000

Reexamination Certificate

active

07900721

ABSTRACT:
In a hard metal plate for insertion in to a seat formed at one end of a drill shaft of a rock drill, comprising a substantially rectangular base shape having two opposed long sides extending in the axial direction of the drill shaft which are at least partially covered by the seat, two opposed, substantially axial free short sides, a radial bottom side facing towards the seat and a cutting face facing away from the seat, both short sides are formed by an axial section having a purely axial direction component and a conical section inclined towards the axial direction, so that at the short side, the substantially rectangular plate tapers towards the bottom side.

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German Patent Office, First Official Action, Jan. 11, 2008.

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