EP1279793B1 - Drill head - Google Patents
Drill head Download PDFInfo
- Publication number
- EP1279793B1 EP1279793B1 EP02015007A EP02015007A EP1279793B1 EP 1279793 B1 EP1279793 B1 EP 1279793B1 EP 02015007 A EP02015007 A EP 02015007A EP 02015007 A EP02015007 A EP 02015007A EP 1279793 B1 EP1279793 B1 EP 1279793B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill head
- nose
- accordance
- drill
- approximately
- 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.)
- Expired - Lifetime
Links
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Definitions
- the invention relates to a drill head for a drill for manufacture of boreholes with displacement of the soil with a threaded core, which is of a larger diameter at its rear Continuously helical end to a tip at its front end tapered so that the outer circumference of the thread core in cross section seen a stepped contour with horizontal and vertical Forms step surfaces.
- Such a drill is known from DE 29 36 060 C2.
- the drill head can be detachably attached to a drill pipe.
- the drill head is as Hollow body formed and carries a collar on the back, in which the Drill pipe can be inserted with its front end.
- the core surrounding the drill head continuously re-threads pressed outside, the displacement forces with increasing Increase the diameter of the drill head.
- power losses occur because the soil with increasing basic voltage in an area with lower basic voltage dodging. This phenomenon is also known as "slip".
- An alternative drill is known from DE 32 35 118 A1.
- the drill head has a discontinuous helical step with a square Cross-section that is on the outer catch of the thread core.
- the nose provided according to the invention is used when screwing in the Drill head into the soil through the inclined surface of the nose one after Force directed above, which generates the slip described above reduced. This allows drilling to be carried out faster and higher Drilling performance is possible.
- the nose extends continuously from the area of the rear end of the drill head to in the area of the top. This will along the largest possible Screw length of the drill head generates the upward force.
- the radial extension is the nose about 1 to 5% of the maximum diameter of the thread core. This ensures that the reduction of Slips is ensured, however, that the nose is too large due to radial Expansion no other negative effects on the drilling process causes.
- the radial extension of the nose may be preferred 10 to 20 mm, in particular approximately 15 mm.
- the ratio of radial to axial extension of the nose can be about 2: 1. Such training has positive results in test trials shown.
- a helically surrounding rib is provided at the end of the drill head be that does not overlap with the nose.
- the earth drill shown in Figs. 1 and 2 consists essentially from a drill pipe 1 and a single drill head 2.
- the drill head 2 is a metallic hollow cone body with a thread core that extends from a larger diameter at its rear end to a point continuously tapering its front end so that the outer circumference of the thread core seen in cross section a step-shaped Contour with horizontal step surfaces 12 and vertical step surfaces 14 forms.
- the metallic hollow cone body also has one helical inside so that it turns to the height of the turns has the same wall thickness everywhere. The only exception is the open top cone base, which has a larger wall thickness.
- the reinforced cone base is provided with teeth 3, the gaps between the teeth 3 with the interior and the base opening of the Hollow cone body in connection.
- the upper edge of the collar 5 has an inner bevel 7.
- the Inner wall of the hollow cone body thus formed is with stiffening ribs Mistake.
- the apex angle a of the drill head 2 designed in this way is approximately 50 up to 60 °.
- one is continuous on the outer circumference of the thread core helically encircling nose 16 is provided, the underside 18 seen in cross section flush with the adjacent horizontal step surface 12 connects.
- the top 20 of the nose 16 forms the bottom 18 an acute angle ⁇ of about 20 °.
- the nose 16 extends continuously from the area of rear end or the cylindrical portion of the drill head up to the area of its top.
- the radial extension of the nose is approximately 1 up to 5% of the maximum diameter of the thread core, preferably about 10 to 20 mm.
- the ratio of radial to axial extension of the nose is about 2: 1.
- the nose 16 is at its radially outer end rounded.
- the drill pipe 1 is a metallic hollow cylinder whose outer diameter is only slightly smaller than the inside diameter of the collar 5. One end of this drill pipe 1 is between the teeth 3 of the Provide drill head 2 matching teeth 8.
- the earth auger is installed by inserting the with teeth provided end of the drill pipe 1 in the open, inside the collar 5 located end of the drill head 2, whereby, as especially from Fig. 2nd it can be seen between the bevel 7 of the collar 5 and the lower one End of the drill pipe 1, a strand 9 of a suitable, sealing Packing material is arranged during the further pushing in of the drill pipe 1 in the drill head 2 automatically between the latter End and the inner wall of the collar 5 is taken. It results an excellent seal between the Drill tube 1 and the drill head 2.
- the teeth 8 of the tube 1 and the teeth 3 of the drill head 2 are in engagement with one another, can be on the bevel 7, of which the aforementioned strand 9 is now entirely has removed a second strand 10 of the same sealing packing material Arrange.
- This second strand is used when using the earth auger by acting on the outside of the auger in the borehole Water pressure in the slot between the bevel 7 and the drill 1 pressed, which further improves the seal between the Drill pipe 1 and the drill head 2 results.
- the drill pipe 1 filled with concrete. After the concrete has hardened, If necessary, pull the drill pipe out of the drill hole.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
Die Erfindung betrifft einen Bohrkopf für einen Bohrer zur Herstellung von Erdbohrlöchern unter Verdrängung des Erdreichs mit einem Gewindekem, der sich von einem größeren Durchmesser an seinem hinteren Ende zu einer Spitze an seinem vorderen Ende kontinuierlich schraubenförmig verjüngt, so daß der Außenumfang des Gewindekerns im Querschnitt gesehen eine stufenförmige Kontur mit horizontalen und vertikalen Stufenflächen bildet.The invention relates to a drill head for a drill for manufacture of boreholes with displacement of the soil with a threaded core, which is of a larger diameter at its rear Continuously helical end to a tip at its front end tapered so that the outer circumference of the thread core in cross section seen a stepped contour with horizontal and vertical Forms step surfaces.
Ein derartiger Bohrer ist aus der DE 29 36 060 C2 bekannt. Der Bohrkopf kann lösbar an einem Bohrrohr befestigt werden. Der Bohrkopf ist als Hohlkörper ausgebildet und trägt rückseitig einen Kragen, in den das Bohrrohr mit seinem Vorderende einsteckbar ist. Beim Eindrehen eines solchen Bohrkopfes in das Erdreich wird durch den schraubenförmigen Gewindekern das den Bohrkopf umgebende Erdreich kontinuierlich nach außen gedrückt, wobei die Verdrängungskräfte mit zunehmendem Durchmesser des Bohrkopfes ansteigen. Im Bereich der vertikalen Stufenflächen des Gewindekerns treten Kraftverluste auf, da das Erdreich mit zunehmender Grundspannung in einen Bereich mit niedrigerer Grundspannung ausweicht. Dieses Phänomen wird auch als "Slip" bezeichnet.Such a drill is known from DE 29 36 060 C2. The drill head can be detachably attached to a drill pipe. The drill head is as Hollow body formed and carries a collar on the back, in which the Drill pipe can be inserted with its front end. When turning one such drill head in the ground is through the helical The core surrounding the drill head continuously re-threads pressed outside, the displacement forces with increasing Increase the diameter of the drill head. In the area of the vertical step surfaces of the thread core, power losses occur because the soil with increasing basic voltage in an area with lower basic voltage dodging. This phenomenon is also known as "slip".
Ein alternativer Bohrer ist aus der DE 32 35 118 A1 bekannt. Der Bohrkopf hat eine diskontinuierlich wendelförmige Stufe mit einem quadratischen Querschnitt, daß am Außenfang des Gewindekerns bildet ist. An alternative drill is known from DE 32 35 118 A1. The drill head has a discontinuous helical step with a square Cross-section that is on the outer catch of the thread core.
Es ist die Aufgabe der Erfindung, einen Bohrkopf der eingangs genannten Art zu schaffen, der höhere Bohrleistungen zuläßt.It is the object of the invention to provide a drill head of the type mentioned To create a type that allows higher drilling performance.
Die Lösung dieser Aufgabe erfolgt durch die Merkmale des Anspruchs 1 und insbesondere dadurch, daß am Außenumfang des Gewindekerns eine kontinuierlich wendelförmig umlaufende Nase vorgesehen ist, deren Unterseite im Querschnitt gesehen bündig an eine horizontale Stufenfläche anschließt und deren Oberseite zur Unterseite um eine spitzen Winkel geneigt ist.This object is achieved by the features of claim 1 and in particular in that on the outer circumference of the thread core continuously helical circumferential nose is provided, the underside seen in cross section flush with a horizontal step surface connects and the top to the bottom inclined at an acute angle is.
Durch die erfindungsgemäße vorgesehene Nase wird beim Eindrehen des Bohrkopfes in das Erdreich durch die geneigte Fläche der Nase eine nach oben gerichtete Kraft erzeugt, die den eingangs beschriebenen Slip wesentlich reduziert. Hierdurch kann schneller gebohrt werden und höhere Bohrleistungen sind möglich.The nose provided according to the invention is used when screwing in the Drill head into the soil through the inclined surface of the nose one after Force directed above, which generates the slip described above reduced. This allows drilling to be carried out faster and higher Drilling performance is possible.
Vorteilhafte Ausführungsformen der Erfindung sind in der Beschreibung, der Zeichnung sowie den Unteransprüchen beschrieben.Advantageous embodiments of the invention are in the description, the drawing and the subclaims.
Nach einer ersten vorteilhaften Ausführungsform erstreckt sich die Nase kontinuierlich von dem Bereich des hinteren Endes des Bohrkopfes bis in den Bereich der Spitze. Hierdurch wird entlang der größtmöglichen Schraubenlänge des Bohrkopfes die nach oben gerichtete Kraft erzeugt.According to a first advantageous embodiment, the nose extends continuously from the area of the rear end of the drill head to in the area of the top. This will along the largest possible Screw length of the drill head generates the upward force.
Nach einer weiteren vorteilhaften Ausführungsform beträgt die radiale Erstreckung der Nase etwa 1 bis 5 % des maximalen Durchmessers des Gewindekerns. Hierdurch ist gewährleistet, daß zwar die Reduzierung des Slips sichergestellt ist, daß jedoch die Nase aufgrund einer zu großen radialen Ausdehnung keine anderweitigen negativen Effekte auf den Bohrvorgang hervorruft. Bevorzugt kann die radiale Erstreckung der Nase etwa 10 bis 20 mm insbesondere etwa 15 mm betragen.According to a further advantageous embodiment, the radial extension is the nose about 1 to 5% of the maximum diameter of the thread core. This ensures that the reduction of Slips is ensured, however, that the nose is too large due to radial Expansion no other negative effects on the drilling process causes. The radial extension of the nose may be preferred 10 to 20 mm, in particular approximately 15 mm.
Das Verhältnis von radialer zu axialer Erstreckung der Nase kann etwa 2:1 betragen. Eine solche Ausbildung hat in Testversuchen positive Ergebnisse gezeigt.The ratio of radial to axial extension of the nose can be about 2: 1. Such training has positive results in test trials shown.
Zusätzlich zu der erfindungsgemäßen Nase kann im Bereich des hinteren Endes des Bohrkopfes eine wendelförmig umlaufende Rippe vorgesehen sein, die jedoch nicht mit der Nase überlappt.In addition to the nose according to the invention can in the area of the rear A helically surrounding rib is provided at the end of the drill head be that does not overlap with the nose.
Nachfolgend wird die vorliegende Erfindung rein beispielhaft anhand einer vorteilhaften Ausführungsform und unter Bezugnahme auf die beigefügten Figuren beschrieben. Es zeigen:
- Fig. 1
- einen Teil eines Erdbohrers mit Bohrkopf; und
- Fig. 2
- eine vergrößerte Teildarstellung von Fig. 1, wobei sich das Bohrrohr in einer Lage während des Hineinschiebens in den Bohrkopf kurz vor seiner Einkupplung in den Bohrkopf befindet.
- Fig. 1
- part of an earth auger with a drill head; and
- Fig. 2
- an enlarged partial view of Fig. 1, wherein the drill pipe is in a position while being pushed into the drill head shortly before it is coupled into the drill head.
Der in den Fig. 1 und 2 dargestellte Erdbohrer besteht im wesentlichen
aus einem Bohrrohr 1 und einem einzelnen Bohrkopf 2. Der Bohrkopf 2
ist ein metallischer Hohlkegelkörper mit einem Gewindekern, der sich von
einem größeren Durchmesser an seinem hinteren Ende zu einer Spitze an
seinem vorderen Ende kontinuierlich schraubenförmig verjüngt, so daß
der Außenumfang des Gewindekerns im Querschnitt gesehen eine stufenförmige
Kontur mit horizontalen Stufenflächen 12 und vertikalen Stufenflächen
14 bildet. Der metallische Hohlkegelkörper weist auch eine
schraubenförmige Innenseite auf, so daß er zur Höhe der Windungen
überall die gleiche Wandstärke aufweist. Ausgenommen hiervon ist nur
die oben offene Kegelbasis, die eine größere Wandstärke besitzt.The earth drill shown in Figs. 1 and 2 consists essentially
from a drill pipe 1 and a
Die verstärkte Kegelbasis ist mit Zähnen 3 versehen, wobei die Lücken
zwischen den Zähnen 3 mit dem Innenraum und der Basisöffnung des
Hohlkegelkörpers in Verbindung stehen.The reinforced cone base is provided with
Im Bereich der Zähne 3 ist am Außenumfang im Bereich des hohlzylindrischen
Abschnitts des Bohrkopfes eine auswärts vorspringende, senkrecht
zur Bohrachse verlaufende Rippe 4 vorgesehen.In the area of the
Am offenen Ende des Bohrkopfes 2 steht über der Rippe 4 und den Zähnen
3 ein Kragen 5 vor, der gleichlaufend mit der Bohrkopfachse ist und
nahezu fluchtend in bezug auf die Außenseite der vorletzten, neben der
Rippe 4 befindlichen Windung 6 angeordnet ist.At the open end of the
Der obere Rand des Kragens 5 weist eine innere Abschrägung 7 auf. Die
Innenwand des derart gebildeten Hohlkegelkörpers ist mit Versteifungsrippen
versehen.The upper edge of the
Der Scheitelwinkel a des derart gestalteten Bohrkopfes 2 beträgt etwa 50
bis 60 °. The apex angle a of the
Am Außenumfang des Gewindekerns ist erfindungsgemäß eine kontinuierlich
wendelförmig umlaufende Nase 16 vorgesehen, deren Unterseite 18
im Querschnitt gesehen bündig an die benachbarte horizontale Stufenfläche
12 anschließt. Die Oberseite 20 der Nase 16 bildet zur Unterseite 18
eine spitzen Winkel β von etwa 20°.According to the invention, one is continuous on the outer circumference of the thread core
helically encircling
Wie Fig. 1 zeigt, erstreckt sich die Nase 16 kontinuierlich vom Bereich des
hinteren Endes bzw. des zylindrischen Abschnittes des Bohrkopfes bis in
den Bereich seiner Spitze. Die radiale Erstreckung der Nase beträgt etwa 1
bis 5 % des maximalen Durchmessers des Gewindekerns, bevorzugt etwa
10 bis 20 mm. Das Verhältnis von radialer zu axialer Erstreckung der Nase
beträgt etwa 2:1. Ferner ist die Nase 16 an ihrem radial äußeren Ende
abgerundet.1 shows, the
Das Bohrrohr 1 ist ein metallischer Hohlzylinder, dessen Außendurchmesser
nur wenig kleiner als der Innendurchmesser des Kragens 5 ist.
Das eine Ende dieses Bohrrohres 1 ist mit zwischen die Zähne 3 des
Bohrkopfes 2 passenden Zähnen 8 versehen.The drill pipe 1 is a metallic hollow cylinder whose outer diameter
is only slightly smaller than the inside diameter of the
Die Montage des Erdbohrers findet durch Hineinschieben des mit Zähnen
versehenen Endes des Bohrrohres 1 in das offene, innerhalb des Kragens
5 befindliche Ende des Bohrkopfes 2 statt, wobei, wie vor allem aus Fig. 2
ersichtlich ist, zwischen der Abschrägung 7 des Kragens 5 und dem unteren
Ende des Bohrrohres 1 ein Strang 9 eines geeigneten, abdichtenden
Packungsmaterials angeordnet wird, der während des weiteren Hineinschiebens
des Bohrrohres 1 in den Bohrkopf 2 automatisch zwischen diesem
Ende und der Innenwand des Kragens 5 mitgenommen wird. Es ergibt
sich auf diese Weise eine ausgezeichnete Abdichtung zwischen dem
Bohrrohr 1 und dem Bohrkopf 2. Nach dem Einschieben des ganzen
Bohrrohres 1 in den Bohrkopf 2, wobei sich die Zähne 8 des Rohres 1 und
die Zähne 3 des Bohrkopfes 2 miteinander in Eingriff befinden, läßt sich
auf der Abschrägung 7, von der der vorgenannte Strang 9 sich jetzt ganz
entfernt hat, ein zweiter Strang 10 desselben abdichtenden Packungsmaterials
anordnen. Dieser zweite Strang wird beim Einsatz des Erdbohrers
durch den im Bohrloch auf die Außenseite des Erdbohrers einwirkenden
Wasserdruck in den Schlitz zwischen der Abschrägung 7 und dem Bohrer
1 gedrückt, was eine weitere Verbesserung der Abdichtung zwischen dem
Bohrrohr 1 und dem Bohrkopf 2 zur Folge hat.The earth auger is installed by inserting the with teeth
provided end of the drill pipe 1 in the open, inside the
Wenn der Erdbohrer ganz in das Erdreich hineingebohrt worden ist, wird das Bohrrohr 1 mit Beton gefüllt. Nach dem Härten des Betons läßt sich das Bohrrohr ggf. aus dem Bohrloch herausziehen.When the auger has been completely drilled into the ground, the drill pipe 1 filled with concrete. After the concrete has hardened, If necessary, pull the drill pipe out of the drill hole.
Claims (9)
- A drill head (2) for a drill for the manufacture of boreholes in the earth while displacing the earth, comprising
a screw core which tapers continuously in the manner of a screw from a larger diameter at is rear end to a tip at its front end such that the outer periphery of the screw core forms a step-like contour with horizontal (12) and vertical (14) step surfaces when considered in cross-section,
characterised in that a continuously spirally extending nose (16) is provided at the outer periphery of the screw core and its lower side (18) adjoins and is flush with a horizontal step surface (14), when considered in cross-section, and its upper side (20) is inclined by an acute angle (β) at the lower side (18). - A drill head in accordance with claim 1, characterised in that the nose (16) extends continuously from the region of the rear end up to and into the region of the tip of the drill head (2).
- A drill head in accordance with claim 1, characterised in that the radial extent of the nose (16) amounts to approximately 1 to 5% of the maximum diameter of the screw core.
- A drill head in accordance with claim 1, characterised in that the radial extent of the nose (16) amounts to approximately 10 to 20 mm.
- A drill head in accordance with claim 1, characterised in that the ratio of the radial extent to the axial extent of the nose (16) amounts to approximately 2 to 1.
- A drill head in accordance with claim 1, characterised in that the acute angle (β) amounts to approximately 15° to 25°, in particular to approximately 20°.
- A drill head in accordance with claim 1, characterised in that the nose (16) is rounded at its radially outer end.
- A drill head in accordance with claim 1, characterised in that the screw core has a cylindrical shank section (5) in the region of the rear end; and in that a spirally extending rib (4) is provided in the region of this shank section (5).
- A drill head in accordance with claim 1, characterised in that it is provided with a toothed arrangement (3) at the rear side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10136468A DE10136468A1 (en) | 2001-07-26 | 2001-07-26 | wellhead |
| DE10136468 | 2001-07-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1279793A1 EP1279793A1 (en) | 2003-01-29 |
| EP1279793B1 true EP1279793B1 (en) | 2004-04-07 |
Family
ID=7693200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02015007A Expired - Lifetime EP1279793B1 (en) | 2001-07-26 | 2002-07-04 | Drill head |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1279793B1 (en) |
| DE (2) | DE10136468A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3001250B1 (en) * | 2008-01-03 | 2016-05-13 | Cie Du Sol | DRILLING METHOD COMPRISING A DEOLIDARIZATION STEP OF THE CUTTING TOOL |
| EP2146046B1 (en) | 2008-07-15 | 2014-04-09 | Marti Gründungstechnik AG | Drill head for a drilling device for creating drill holes in insufficiently stable foundation |
| EP4227467A1 (en) | 2022-02-09 | 2023-08-16 | Marti Gründungstechnik AG | Drill head for drilling equipment for creating bores in a construction substrate |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1193081B (en) * | 1963-02-14 | 1965-05-20 | Frank Arnold Nix Dipl Ing | Device for driving up a tunnel with a circular cross-section or the like. |
| FR2215075A6 (en) * | 1973-01-19 | 1974-08-19 | Atlas France | |
| DE2936060C2 (en) * | 1979-09-06 | 1986-11-06 | Fundex P.V.B.A., Zeebrugge | Earth auger and boring head for it |
| FR2516958B1 (en) * | 1981-09-22 | 1985-08-16 | Dn Inzh Str Inst | DEVICE FOR MOLDING HOLLOW PILES AND METHOD OF MAKING SUCH PILES USING THE SAME |
| US6033152A (en) * | 1997-04-11 | 2000-03-07 | Berkel & Company Contractors, Inc. | Pile forming apparatus |
| FR2800796B1 (en) * | 1999-11-04 | 2002-02-01 | Cie Du Sol | AUGER TYPE DRILLING DEVICE |
-
2001
- 2001-07-26 DE DE10136468A patent/DE10136468A1/en not_active Withdrawn
-
2002
- 2002-07-04 EP EP02015007A patent/EP1279793B1/en not_active Expired - Lifetime
- 2002-07-04 DE DE50200332T patent/DE50200332D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE50200332D1 (en) | 2004-05-13 |
| EP1279793A1 (en) | 2003-01-29 |
| DE10136468A1 (en) | 2003-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
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