DE151171C - - Google Patents

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Publication number
DE151171C
DE151171C DENDAT151171D DE151171DA DE151171C DE 151171 C DE151171 C DE 151171C DE NDAT151171 D DENDAT151171 D DE NDAT151171D DE 151171D A DE151171D A DE 151171DA DE 151171 C DE151171 C DE 151171C
Authority
DE
Germany
Prior art keywords
cutting edges
cutting
radial
cutting edge
central
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT151171D
Other languages
German (de)
Publication of DE151171C publication Critical patent/DE151171C/de
Active legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits

Description

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

Claims (1)

KAISERLICHESIMPERIAL PATENTAMT.PATENT OFFICE. JVs 151171 KLASSE JVs 151171 CLASS Bei den bekannten Schrämköpfen mit radialen Schneiden macht sich der Übelstand bemerkbar, daß sich der kegelförmige Zwischenraum z\vischen den Schneiden oder Zähnen bald mit zerkleinerten Gestein- oder Kohlenstückchen . anfüllt. Hierdurch wird das Eindringen der Schneiden in das Gestein behindert, und die sich bei jedem Stoße fester zusammenpressenden Stückchen drücken die Schneiden auseinander.In the case of the known cutting heads with radial cutting edges, the problem arises noticeable that the conical space between the cutting edges or teeth soon with crushed pieces of rock or coal. fills. This will make the penetration the cutting into the rock hinders, and the bits, which are compressed more tightly with each impact, press the Cut apart. Diese Übelstände sollen gemäß der Erfindung dadurch beseitigt werden, daß zwischen die radialen Schneiden eine mittlere kegelförmige Schneide eingesetzt wird. Diese zerkleinert das zwischen den radialen Schneiden eindringende Gut und drückt es zwischen den Zähnen hindurch nach außen.These drawbacks are to be eliminated according to the invention in that between the radial cutting edge a central conical cutting edge is used. This crushed the material penetrating between the radial cutting edges and pushing it out between the teeth. Auf der Zeichnung ist ein Schrämkopf mit vier radialen Schneiden und mit der mittleren Schneide gemäß der Erfindung in der Fig. ι im Grundriß dargestellt. Die Fig. 2 zeigt eine Seitenansicht des Schrämkopfes und die Fig. 3 einen Schnitt nach Linie A-B der Fig. i.In the drawing, a cutter head with four radial cutting edges and with the central cutting edge according to the invention in FIG. 1 is shown in plan. FIG. 2 shows a side view of the cutting head and FIG. 3 shows a section along line AB of FIG. Durch die mittlere Schneide α wird erreicht, daß alle Schneiden b bei jedem Stoß möglichst tief eindringen, so daß eine möglichst große Leistung erzielt wird.The central cutting edge α ensures that all cutting edges b penetrate as deeply as possible with each impact, so that the greatest possible performance is achieved. PateNT-AνSPRUCH :PateNT CLAIM: Schrämkopf mit radialen Schneiden, dadurch gekennzeichnet, daß in dem kegelförmigen Zwischenräume zwischen den radialen Schneiden (b) eine mittlere kegelförmige Schneide (a) angeordnet ist, durch welche das zwischen den radialen Schneiden eindringende Gut zerkleinert und nach außen gedrückt wird.Cutter head with radial cutting edges, characterized in that a central conical cutting edge (a) is arranged in the conical intermediate space between the radial cutting edges (b) , through which the material penetrating between the radial cutting edges is comminuted and pressed outwards.
DENDAT151171D Active DE151171C (en)

Publications (1)

Publication Number Publication Date
DE151171C true DE151171C (en)

Family

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538442A1 (en) * 1982-12-23 1984-06-29 Charbonnages De France JET ASSISTED ROTATING FORTIFIER
DE3707798A1 (en) * 1987-03-11 1988-09-22 Hawera Probst Kg Hartmetall ROCK DRILL
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6174111B1 (en) 1994-12-12 2001-01-16 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538442A1 (en) * 1982-12-23 1984-06-29 Charbonnages De France JET ASSISTED ROTATING FORTIFIER
EP0114016A1 (en) * 1982-12-23 1984-07-25 Etablissement public dit: CHARBONNAGES DE FRANCE Drill bit for combined rotary and jet drilling
US4535853A (en) * 1982-12-23 1985-08-20 Charbonnages De France Drill bit for jet assisted rotary drilling
DE3707798A1 (en) * 1987-03-11 1988-09-22 Hawera Probst Kg Hartmetall ROCK DRILL
US4889200A (en) * 1987-03-11 1989-12-26 Hawera Probst Gmbh+Co. Rock drill
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6174111B1 (en) 1994-12-12 2001-01-16 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials

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