DE201368C

DE201368C -

Info

Publication number: DE201368C
Application number: DENDAT201368D
Authority: DE

Description

Pate nt-A ν strücii ε:Godfather nt-A ν strücii ε:

ι. Gesteinbohrer mit einer mittleren Bohrung und mehreren hintereinanderliegenden seitlichen Austrittsöffnungen für das Spülmittel, dadurch gekennzeichnet, daß die Verbindungskanäle zwischen den seitlichen Austrittsöffnungen und der mittleren Bohrung von innen her schräg nach hinten gerichtet sind.ι. Rock drill with a central hole and several one behind the other Lateral outlet openings for the detergent, characterized in that the connecting channels between the lateral outlet openings and the central hole from the inside at an angle are directed backwards.

2. Ausführungsform des Gesteinbohrers nach Anspruch 1, dadurch gekennzeichnet, daß mehrere Reihen von seitlichen Austrittsöffnungen hintereinander ringsum den Bohrerschaft vorhanden sind.2. Embodiment of the rock drill according to claim 1, characterized in that that there are several rows of side outlets one behind the other around the drill shank.

3. Ausführungsform des Gesteinbohrers nach Anspruch 2, dadurch gekennzeichnet, daß die hinteren Reihen der seitlichen Austrittsöffnungen gegenüber den vorderen Reihen an Größe stufenweise abnehmen.3. embodiment of the rock drill according to claim 2, characterized in that that the back rows of the side outlets opposite the front Gradually decrease rows in size.

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

Claims

IMPERIAL

PATENT OFFICE.

With the current hollow drills, the major disadvantage is that you can only ^{drill I 1} Z ₂ vertically downwards, in the best case 2 m. This is due to the fact that the flushing agent, especially compressed air, which emerges at the front of the cutting edge of the drill or from lateral openings of the drill shaft at right angles to the drill axis, is unable to remove the drill dust up to the top of the borehole

ίο get it out because it's by your own Heaviness keeps falling back into the borehole; so up to now one had to stop making deeper boreholes. Distance yourself.

This drawback is eliminated by the new invention. After this, the detergent should no longer forward at the cutting edge or at right angles against the borehole wall directed lateral flushing channels emerge, but from obliquely rearwardly directed lateral flushing channels through the the detergent is blown out of the borehole at an angle to the rear and thereby the Drill dust with it. Such outlet openings are then expedient in several To attach rows one behind the other around the drill shaft. The size of the openings can gradually decrease the further back you are.

With such drills, holes of unlimited depth can be drilled, since the Eliminating the drill dust does not cause any problems with them.

In the drawing, the invention is shown in an exemplary embodiment and means

α the borehole, b the hollow drill, c the drill dust, i, 2, 3 the obliquely rearward-directed outlet channels for the flushing agent at the various points on the drill shank.