Rock drill
AssigneeHilti Aktiengesellschaft
InventorsRainer Batliner, Steven Moseley, Edwin Schweizer, Udo Hauptmann
Life of this patent
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AssigneeHilti Aktiengesellschaft
InventorsRainer Batliner, Steven Moseley, Edwin Schweizer, Udo Hauptmann
Estimating the term…
A rock drill including a drill stem (2), major cutting edges (5, 6) extending substantially over a diameter of the drill stem (2) and projecting beyond the end face (3) of the drill stem, and at least one minor cutting edge (9, 10) extending substantially in a radial direction and provided on at least one elongate cutting body (7, 8) which projects beyond the end face (3), with the minor cutting edge (9, 10) being located, at a contemplated rotational direction (R) of the drill (1) about the drill axis (A), in front of a corresponding major cutting edge (5, 6) adjacent to a main discharge groove (13) for drilling dust, and with the elongate cutting body (7, 8) having a cutting surface (11) tapering from the minor cutting edge (9) toward the end face (3) of the drill stem (2) and having at least one inclination surface (12) adjacent to the circumference of the drill stem (2) and inclined toward the circumference of the drill stem and with respect to a radial extension of the minor cutting edge (9), in a direction opposite the drill rotational direction (R).
A rock drill, comprising a drill stem (2) having an end face (3);
Dependencies are inferred from the claim text.