EP0263281A1 - Pneumatic boring ram - Google Patents

Pneumatic boring ram Download PDF

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Publication number
EP0263281A1
EP0263281A1 EP87112220A EP87112220A EP0263281A1 EP 0263281 A1 EP0263281 A1 EP 0263281A1 EP 87112220 A EP87112220 A EP 87112220A EP 87112220 A EP87112220 A EP 87112220A EP 0263281 A1 EP0263281 A1 EP 0263281A1
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EP
European Patent Office
Prior art keywords
boring machine
ram boring
hollow cylinder
machine according
exhaust air
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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.)
Granted
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EP87112220A
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German (de)
French (fr)
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EP0263281B1 (en
Inventor
Paul Schmidt
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Individual
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Individual
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Priority to AT87112220T priority Critical patent/ATE57644T1/en
Publication of EP0263281A1 publication Critical patent/EP0263281A1/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/11—Arrangements of noise-damping means
    • B25D17/12—Arrangements of noise-damping means of exhaust silencers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/002—Down-hole drilling fluid separation systems
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • E21B4/145—Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
    • E21B7/205—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal
    • E21B7/206—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal using down-hole drives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00—Tool driving or impacting
    • Y10S173/02—Sound muffling

Definitions

  • the invention relates to a pneumatic ram boring machine in which an axially reciprocating piston delivers its impact energy to the housing and / or its impact tip.
  • Ram boring machines also known as ground rockets, are primarily used to lay water or electricity supply lines and telephone cables without having to tear down the pavement or sidewalks. They usually have a percussion tip which is actuated by a pneumatically operated percussion piston. When the percussion tip is propelled, the percussion piston is moved back and forth in a tubular housing in that compressed air supplied via a compressed air line alternately acts on the front and rear foreheads of the percussion piston. Through openings in the rear end of the housing allow the exhaust air to exit into the earth channel created by the ram boring machine and from there to the outside.
  • compressed air lubricants such as B. mineral oils or other additives. These additives are released as a mist together with the exhaust air and pose a danger to the operating personnel and the environment.
  • the noise generated by most ram boring machines often exceeds the permanently harmful level of 90 dBA. This level is usually exceeded even with a ram boring machine that mainly works below the surface. In particular, if a pipe is pulled in at the same time as the ramming, considerable noise escapes because the pipe acts like a sound pipe.
  • the invention has for its object to provide a ram boring machine which reduces some of the environmental impairments accompanying the operation of such compressed air devices.
  • This object is achieved according to the invention in a ram boring machine of the type mentioned at the outset by an air-permeable hollow cylinder arranged in the exhaust air flow and having a sound-absorbing and / or an oil-separating filling.
  • the hollow cylinder has a central passage, it can be pulled over the compressed air line of the ram boring machine; it can also have a concentric pipe section, for example with protruding threads for screwing with two sections of the compressed air line.
  • the hollow cylinder then fills approximately the free annular space between the compressed air line and the wall of the earth channel created by the ram boring machine, so that essentially all of the exhaust air is conditioned.
  • the hollow cylinder can also have a cable connection on at least one end face, in order to be able to tension a cable between the rear end of the ram boring machine and the hollow cylinder and / or the hollow cylinder and a pulling tube.
  • the filter can also be arranged directly at the rear end of the ram boring machine or at a distance in a pipe pulled by the machine, since its outside diameter is adapted to the outside diameter of the compressed air device. In any case, it is ensured that practically no exhaust air escapes without having passed the filter.
  • the hollow cylinder can have holes in its end faces serving as passages for the exhaust air coming from the ram boring machine. If the exhaust air inlet holes and the exhaust air outlet holes are opposite one another, an air passage which is only damped by the filling but is otherwise unimpeded is ensured.
  • the filter 1 consists of a hollow cylinder 2, the end faces 3, 4 of which each have a central circular opening 5 for a tube piece 6 of smaller diameter and slightly greater length arranged concentrically to the cylinder 2 for pulling through a compressed air line 10 and further with their center points arranged concentrically to the opening 5 Have holes 7, 8.
  • filter materials 9, 11 for filtering and soundproofing the exhaust air flow.
  • the filter can also be arranged between two sections of the compressed air line 10, it then migrates with the compressed air line in accordance with the device advance.
  • the filter 1 is arranged in a pneumatically operated ram boring machine 12 in such a way that the compressed air reaches the ram boring machine 12 in the direction of arrow 14, then the exhaust air penetrates through the holes 7 on the end face 3 into the sound-absorbing filling 9 and then into the oil-separating filling 11 and finally emerges from the holes 8 on the end face 5.
  • the filter 1 can be arranged directly at the rear end of the ram boring machine 12 (FIG. 3), at the beginning of the earth channel 13 created by the ram boring machine 12 (FIG. 4) or in a protective tube 15 drawn by the ram boring machine 12 (FIG. 5).
  • the ram boring machine 12 is provided with a control line 16 and a pull rope 17, the hollow cylinder preferably has a corresponding, axially parallel passage, not shown in the drawing on.
  • the pull rope can also be attached directly to the hollow cylinder.
  • Its outer diameter corresponds to that of the ram boring machine or that of the protective tube, so that practically no exhaust air can escape unfiltered.
  • the filter according to the invention substantially reduces the sound level of the exhaust air of 100 dBA in ram boring machines and removes oil to a high percentage from the exhaust air. This is of particular importance because ram boring machines of the type in question are mostly used in densely populated and / or busy areas for trenchless laying of supply lines.

Abstract

A pneumatic ram boring machine (12) has an air-permeable hollow cylinder (2) with a sound absorbing and/or oil separating packing (9, 11) arranged in the exhaust air stream of the machine.

Description

Die Erfindung betrifft ein pneumatisches Rammbohrgerät, bei dem ein axial hin- und herbewegter Kolben seine Schlagenergie an das Gehäuse und/oder dessen Schlagspitze abgibt.The invention relates to a pneumatic ram boring machine in which an axially reciprocating piston delivers its impact energy to the housing and / or its impact tip.

Rammbohrgeräte, auch unter der Bezeichnung Bodenraketen bekannt, dienen in erster Linie dazu, Versorgungsleitungen für Wasser oder Elektrizität sowie Telefonkabel zu verlegen, ohne die Straßendecke oder die Bürgersteige aufreißen zu müssen. Sie besitzen gewöhnlich eine von einem pneumatisch betriebenen Schlagkolben beaufschlagte Schlagspitze. Beim Vortrieb der Schlagspitze wird der Schlagkolben in einem rohrförmigen Gehäuse hin- und herbewegt, indem über eine Druckluftleitung zugeführte Druckluft wechselweise die vordere und die rückwärtige Stirn des Schlagkolbens beaufschlagt. Durchtrittsöffnungen im rückwärtigen Gehäuseende erlauben den Austritt der Abluft in den von dem Rammbohrgerät geschaffenen Erdkanal und von dort ins Freie.Ram boring machines, also known as ground rockets, are primarily used to lay water or electricity supply lines and telephone cables without having to tear down the pavement or sidewalks. They usually have a percussion tip which is actuated by a pneumatically operated percussion piston. When the percussion tip is propelled, the percussion piston is moved back and forth in a tubular housing in that compressed air supplied via a compressed air line alternately acts on the front and rear foreheads of the percussion piston. Through openings in the rear end of the housing allow the exhaust air to exit into the earth channel created by the ram boring machine and from there to the outside.

Wie bei den meisten Druckluftgeräten werden auch bei Rammbohrgeräten der Druckluft Schmierstoffe wie z. B. Mineralöle oder andere Zusätze beigemischt. Diese Zusatzstoffe gelangen als Nebel zusammen mit der Abluft ins Freie und stellen eine Gefahr für das Bedienungspersonal und die Umwelt dar.As with most pneumatic devices, compressed air lubricants such as B. mineral oils or other additives. These additives are released as a mist together with the exhaust air and pose a danger to the operating personnel and the environment.

Der von den meisten Rammbohrgeräten erzeugte Lärm übersteigt häufig den auf Dauer gesundheitsschädlichen Pegel von 90 dBA. Auch bei einem vorwiegend unter der Erdoberfläche arbeitenden Rammbohrgerät wird dieser Pegel meist überschritten. Insbesondere wenn gleichzeitig mit dem Rammen ein Leitungsrohr eingezogen wird, dringt erheblicher Lärm nach außen, da das Rohr wie ein Schallrohr wirkt.The noise generated by most ram boring machines often exceeds the permanently harmful level of 90 dBA. This level is usually exceeded even with a ram boring machine that mainly works below the surface. In particular, if a pipe is pulled in at the same time as the ramming, considerable noise escapes because the pipe acts like a sound pipe.

Der Erfindung liegt die Aufgabe zugrunde, ein Rammbohrgerät zu schaffen, das einen Teil der den Betrieb solcher Druckluftgeräte begleitenden Beeinträchtigungen der Umwelt vermindert.The invention has for its object to provide a ram boring machine which reduces some of the environmental impairments accompanying the operation of such compressed air devices.

Diese Aufgabe wird bei einem Rammbohrgerät der eingangs genannten Art erfindungsgemäß durch einen im Abluftstrom angeordneten luftdurchlässigen Hohlzylinder mit einer schalldämpfenden und/oder einer ölabscheidenden Füllung gelöst.This object is achieved according to the invention in a ram boring machine of the type mentioned at the outset by an air-permeable hollow cylinder arranged in the exhaust air flow and having a sound-absorbing and / or an oil-separating filling.

Wenn der Hohlzylinder einen zentrischen Durchlass aufweist, läßt er sich über die Druckluftleitung des Rammbohrgerätes ziehen; er kann auch ein konzentrisches Rohrstück beispielsweise mit überstehenden Gewinden zum Verschrauben mit zwei Teilstücken der Druckluftleitung aufweisen. Der Hohlzylinder füllt dann in etwa den freien Ringraum zwischen der Druckluftleitung und der Wandung des von dem Rammbohrgerät geschaffenen Erdkanals aus, so daß im wesentlichen die gesamte Abluft konditioniert wird.If the hollow cylinder has a central passage, it can be pulled over the compressed air line of the ram boring machine; it can also have a concentric pipe section, for example with protruding threads for screwing with two sections of the compressed air line. The hollow cylinder then fills approximately the free annular space between the compressed air line and the wall of the earth channel created by the ram boring machine, so that essentially all of the exhaust air is conditioned.

Des weiteren kann der Hohlzylinder auch an mindestens einer Stirnseite einen Seilanschluß besitzen, um zwischen dem rückwärtigen Ende des Rammbohrgeräts und dem Hohlzylinder und/oder dem Hohlzylinder und einem Nachziehrohr ein Seil spannen zu können.Furthermore, the hollow cylinder can also have a cable connection on at least one end face, in order to be able to tension a cable between the rear end of the ram boring machine and the hollow cylinder and / or the hollow cylinder and a pulling tube.

Der Filter läßt sich auch direkt am rückwärtigen Ende des Rammbohrgeräts oder aber im Abstand in einem vom Gerät nachgezogenen Leitungsrohr anordnen, da sein Außendurchmesser dem Aussendurchmesser des Druckluftgeräts angepaßt ist. In jedem Fall ist gewährleistet, daß praktisch keine Abluft nach außen dringt, ohne den Filter passiert zu haben.The filter can also be arranged directly at the rear end of the ram boring machine or at a distance in a pipe pulled by the machine, since its outside diameter is adapted to the outside diameter of the compressed air device. In any case, it is ensured that practically no exhaust air escapes without having passed the filter.

Der Hohlzylinder kann als Durchlässe für die vom Rammbohrgerät kommende Abluft dienende Löcher in seinen Stirnseiten aufweisen. Wenn die Ablufteintrittslöcher und die Abluftaustrittslöcher einander gegenüberliegen, ist ein lediglich durch die Füllung gedämpfter, aber ansonsten ungehinderter Luftdurchtritt gewährleistet.The hollow cylinder can have holes in its end faces serving as passages for the exhaust air coming from the ram boring machine. If the exhaust air inlet holes and the exhaust air outlet holes are opposite one another, an air passage which is only damped by the filling but is otherwise unimpeded is ensured.

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels des näheren erläutert. In der Zeichnung zeigen:

  • Fig. 1 einen erfindungsgemäßen Filter im Längsschnitt,
  • Fig. 2 eine Vorderansicht des Filters gemäß Fig. 1,
  • Fig. 3 einen mit einem Rammbohrgerät verbundenen Filter gemäß Fig. 1,
  • Fig. 4 einen im Eingang eines Erdkanals angeordneten Filter gemäß Fig. 1 und
  • Fig. 5 einen in einem Nachziehrohr angeordneten Filter gemäß Fig. 1.
The invention is explained below with reference to an embodiment shown in the drawing. The drawing shows:
  • 1 shows a filter according to the invention in longitudinal section,
  • 2 is a front view of the filter of FIG. 1,
  • 3 shows a filter connected to a ram boring machine according to FIG. 1,
  • 4 shows a filter arranged in the entrance of an earth channel according to FIGS. 1 and
  • 5 shows a filter according to FIG. 1 arranged in a draw tube.

Der Filter 1 besteht aus einem Hohlzylinder 2, dessen Stirnseiten 3, 4 jeweils eine zentrische kreisförmige Öffnung 5 für ein konzentrisch zum Zylinder 2 angeordnetes Rohrstück 6 kleineren Durchmessers und geringfügig größerer Länge zum Durchziehen einer Druckluftleitung 10 sowie weitere mit ihren Mittelpunkten konzentrisch zur Öffnung 5 angeordneten Löchern 7, 8 aufweisen. In dem Zylinder 2 befinden sich Filtermaterialien 9, 11 zum Filtern und Schalldämmen des Abluftstroms.The filter 1 consists of a hollow cylinder 2, the end faces 3, 4 of which each have a central circular opening 5 for a tube piece 6 of smaller diameter and slightly greater length arranged concentrically to the cylinder 2 for pulling through a compressed air line 10 and further with their center points arranged concentrically to the opening 5 Have holes 7, 8. In the cylinder 2 there are filter materials 9, 11 for filtering and soundproofing the exhaust air flow.

Weist das Rohrstück an seinen überstehenden Teilen eine Schlauchkupplung, beispielsweise ein Gewinde, auf, läßt sich der Filter auch zwischen zwei Teilstücken der Druckluftleitung 10 anordnen, er wandert dann mit der Druckluftleitung entsprechend dem Gerätevortrieb.If the pipe section has a hose coupling, for example a thread, on its protruding parts, the filter can also be arranged between two sections of the compressed air line 10, it then migrates with the compressed air line in accordance with the device advance.

Wenn der Filter 1 bei einem pneumatisch betriebenen Rammbohrgerät 12 so angeordnet wird, daß die Druckluft in Richtung des Pfeils 14 zum Rammbohrgerät 12 gelangt, dann dringt die Abluft durch die Löcher 7 der Stirnseite 3 in die schalldämpfende Füllung 9 und anschließend in die ölabscheidende Füllung 11 und tritt schließlich aus den Löchern 8 der Stirnseite 5 aus.If the filter 1 is arranged in a pneumatically operated ram boring machine 12 in such a way that the compressed air reaches the ram boring machine 12 in the direction of arrow 14, then the exhaust air penetrates through the holes 7 on the end face 3 into the sound-absorbing filling 9 and then into the oil-separating filling 11 and finally emerges from the holes 8 on the end face 5.

Die Fig. 3 bis 5 zeigen verschiedene Anordnungsmöglichkeiten für den Filter 1; er läßt sich direkt am rückwärtigen Ende des Rammbohrgerätes 12 (Fig. 3), am Anfang des vom Rammbohrgerät 12 erstellten Erdkanals 13 (Fig. 4) oder in einem vom Rammbohrgerät 12 nachgezogenen Schutzrohr 15 (Fig. 5) anordnen. Ist das Rammbohrgerät 12 mit einer Steuerleitung 16 und einem Nachziehseil 17 versehen, weist der Hohlzylinder vorzugsweise einen entsprechenden, in der Zeichnung nicht dargestellten, achsparallelen Durchlass auf. Das Nachziehseil kann aber auch direkt am Hohlzylinder befestigt sein.3 to 5 show different possible arrangements for the filter 1; it can be arranged directly at the rear end of the ram boring machine 12 (FIG. 3), at the beginning of the earth channel 13 created by the ram boring machine 12 (FIG. 4) or in a protective tube 15 drawn by the ram boring machine 12 (FIG. 5). If the ram boring machine 12 is provided with a control line 16 and a pull rope 17, the hollow cylinder preferably has a corresponding, axially parallel passage, not shown in the drawing on. The pull rope can also be attached directly to the hollow cylinder.

Sein Außendurchmesser entspricht dem des Rammbohrgeräts oder dem des Schutzrohrs, so daß praktisch keine Abluft ungefiltert entweichen kann.Its outer diameter corresponds to that of the ram boring machine or that of the protective tube, so that practically no exhaust air can escape unfiltered.

Es hat sich gezeigt, daß der erfindungsgemäße Filter bei Rammbohrgeräten den Schallpegel der Abluft von 100 dBA wesentlich verringert und Öl zu einem hohen Prozentsatz aus der Abluft entfernt. Dies ist von besonderer Bedeutung, weil Rammbohrgeräte der in Rede stehenden Art zumeist in dicht besiedelten und/oder verkehrsreichen Gebieten zum grabenlosen Verlegen von Versorgungsleitungen eingesetzt werden. It has been shown that the filter according to the invention substantially reduces the sound level of the exhaust air of 100 dBA in ram boring machines and removes oil to a high percentage from the exhaust air. This is of particular importance because ram boring machines of the type in question are mostly used in densely populated and / or busy areas for trenchless laying of supply lines.

Claims (7)

1. Pneumatisches Rammbohrgerät, bei dem ein axial hin- und herbewegter Kolben seine Schlagenergie an das Gehäuse und/oder dessen Schlagspitze abgibt, gekennzeichnet durch einen im Abluftstrom angeordneten luftdurchlässigen Hohlzylinder (2) mit einer schalldämpfenden und/oder einer ölabscheidenden Füllung (9, 11).1. Pneumatic ram boring machine in which an axially reciprocating piston delivers its impact energy to the housing and / or its impact tip, characterized by an air-permeable hollow cylinder (2) arranged in the exhaust air stream with a sound-absorbing and / or an oil-separating filling (9, 11 ). 2. Rammbohrgerät nach Anspruch 1, dadurch gekennzeichnet, daß der Hohlzylinder (2) ein konzentrisches Rohrstück (6) aufweist.2. A ram boring machine according to claim 1, characterized in that the hollow cylinder (2) has a concentric pipe section (6). 3. Rammbohrgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß Ablufteinlaßlöcher (7) Abluftauslaßlöchern (8) gegenüberliegen.3. A ram boring machine according to claim 1 or 2, characterized in that exhaust air inlet holes (7) opposite exhaust air outlet holes (8). 4. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Hohlzylinder (2) am rückwärtigen Ende des Geräts (12) angeordnet ist.4. A ram boring machine according to one or more of claims 1 to 3, characterized in that the hollow cylinder (2) is arranged at the rear end of the device (12). 5. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß mindestens eine Stirnfläche des Hohlzylinders mit einem Seilanschluß versehen ist.5. A ram boring machine according to one or more of claims 1 to 4, characterized in that at least one end face of the hollow cylinder is provided with a cable connection. 6. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Hohlzylinder (2) in dem vom Gerät (12) geschaffenen Erdkanal (13) angeordnet ist.6. A ram boring machine according to one or more of claims 1 to 3, characterized in that the hollow cylinder (2) is arranged in the earth channel (13) created by the device (12). 7. Rammbohrgerät nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Hohlzylinder (2) in einem Nachziehrohr (14) angeordnet ist.7. A ram boring machine according to one or more of claims 1 to 3, characterized in that the hollow cylinder (2) is arranged in a pulling tube (14).
EP87112220A 1986-10-10 1987-08-22 Pneumatic boring ram Expired - Lifetime EP0263281B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112220T ATE57644T1 (en) 1986-10-10 1987-08-22 PNEUMATIC DRILLING RIG.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863634579 DE3634579A1 (en) 1986-10-10 1986-10-10 PNEUMATIC DRILL DRILL
DE3634579 1986-10-10

Publications (2)

Publication Number Publication Date
EP0263281A1 true EP0263281A1 (en) 1988-04-13
EP0263281B1 EP0263281B1 (en) 1990-10-24

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ID=6311485

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Application Number Title Priority Date Filing Date
EP87112220A Expired - Lifetime EP0263281B1 (en) 1986-10-10 1987-08-22 Pneumatic boring ram

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US (1) US4840234A (en)
EP (1) EP0263281B1 (en)
JP (1) JPS63107686A (en)
AT (1) ATE57644T1 (en)
DE (1) DE3634579A1 (en)

Cited By (4)

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WO1991012987A1 (en) * 1990-03-02 1991-09-05 Desinsectisation Moderne Self propelled probe, particularly for penetrating a powdered material
FR2659112A1 (en) * 1990-03-02 1991-09-06 Desinsectisation Moderne Borer for penetrating and moving in a mass of pulverulent material
FR2659111A1 (en) * 1990-03-02 1991-09-06 Desinsectisation Moderne Borer comprising air exhaust (escape, outlet) means
EP0694675A1 (en) * 1994-07-30 1996-01-31 Tracto-Technik Paul Schmidt Spezialmaschinen Kg Fixing and clamping tensioning device for a tow rope connected to a boring ram

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US20080148697A1 (en) * 2006-12-20 2008-06-26 Chia Sheng Liang Filter for Nail Gun

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Publication number Priority date Publication date Assignee Title
DE14978C (en) * Gildemeister & Kamp in Dortmund Innovations in drilling equipment for drilling overcuts
CH351921A (en) * 1958-01-10 1961-01-31 Ganz Rudolf Jackhammer
CH378820A (en) * 1960-03-18 1964-06-15 Sig Schweiz Industrieges Silencer on compressed air tool
US4134472A (en) * 1977-08-29 1979-01-16 Trainor John B Combination muffler and air filter
US4144941A (en) * 1977-09-30 1979-03-20 Ritter Lester L Directional impact tool for tunneling
US4196783A (en) * 1978-07-11 1980-04-08 Lofs Verkstads Ab Device for boring
CA1155400A (en) * 1981-02-09 1983-10-18 George H. Williams Muffler
US4424883A (en) * 1981-03-31 1984-01-10 Panda S.R.L. Silencer for pneumatic equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012987A1 (en) * 1990-03-02 1991-09-05 Desinsectisation Moderne Self propelled probe, particularly for penetrating a powdered material
FR2659112A1 (en) * 1990-03-02 1991-09-06 Desinsectisation Moderne Borer for penetrating and moving in a mass of pulverulent material
FR2659111A1 (en) * 1990-03-02 1991-09-06 Desinsectisation Moderne Borer comprising air exhaust (escape, outlet) means
US5377551A (en) * 1990-03-02 1995-01-03 Desinsectisation Moderne Probe for penetrating and displacing particularly into a mass of pulverulent material
EP0694675A1 (en) * 1994-07-30 1996-01-31 Tracto-Technik Paul Schmidt Spezialmaschinen Kg Fixing and clamping tensioning device for a tow rope connected to a boring ram

Also Published As

Publication number Publication date
US4840234A (en) 1989-06-20
JPS63107686A (en) 1988-05-12
ATE57644T1 (en) 1990-11-15
DE3634579A1 (en) 1988-04-21
EP0263281B1 (en) 1990-10-24

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