US3865200A - Burrowing apparatus - Google Patents

Burrowing apparatus Download PDF

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Publication number
US3865200A
US3865200A US307573A US30757372A US3865200A US 3865200 A US3865200 A US 3865200A US 307573 A US307573 A US 307573A US 30757372 A US30757372 A US 30757372A US 3865200 A US3865200 A US 3865200A
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United States
Prior art keywords
housing
percussion
tip
piston
control sleeve
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
Application number
US307573A
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English (en)
Inventor
Paul Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tracto Technik GmbH and Co KG
Original Assignee
Tracto Technik GmbH and Co KG
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Filing date
Publication date
Application filed by Tracto Technik GmbH and Co KG filed Critical Tracto Technik GmbH and Co KG
Priority to FR7326183A priority Critical patent/FR2207300A1/fr
Application granted granted Critical
Publication of US3865200A publication Critical patent/US3865200A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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

Definitions

  • ABSTRACT [30] F i A n i P i i D t 1 1 prneumatie brurrowing apparatus comprdisingha tIubZ- 18 97 I M57259 ar ousmg wit a percussion tip mounte att e ea NOV 1 1 German) ing end of said housing and mcludmg a rearwardly di- [57] Us Cl 175/19 73/99 173/133 rected portion extending interiorly of said housing, i 11/02 said tip being arranged for axial movement relative to [58] Pic. 73 94 said housing.
  • a percussion piston is mounted for re- 91 ciprocal motion within the housing and arranged to strike said percussion tip to impart a forwardly di- [56 ⁇ References cued rected force thereto.
  • Spring means mounted between the percussion tip and the housing are arranged to be UNITED STATES PATENTS compressed therebetween when the tip is driven for- 955 899 4/l910 Proctor l73/l33 X wardly by Said percussion piston
  • a displacement cone #931068 10/1933 f mounted proximate the leading end of the housing g X moves forwardly with the housing during a burrowing 5 H1960 g S 173/08 operation but is loosely slidable relative to said hous- 311371423 6/1964 ZinEiewi e z .II 173/91 x the housing is Withdrawn from burrowed 3,375,885 4/1968 Scott et al 175/94 X p 3,407 884 lO/l968 Z
  • the invention concerns a self-driven, pneumatic burrowing device, in particular for ground drilling, having a percussion tip and a percussion piston reciprocating in the housing.
  • Such devices are also known under the designation ground rocket, percussion hammer or percussion drill and serve primarily to install supply lines, such as water pipes, electric or telephone lines under streets or sidewalks without requiring that the pavements or the sidewalks be broken open.
  • the housing of the burrowing apparatus is subjected to very high loads, so that its life is normally at most 500 hours of operation.
  • the diameter of such devices is 135 mm and more, although in the practice 50 mm are usually sufficient as diameter for the bores.
  • the large housing diameter entails high friction, which greatly reduces the advance of the device.
  • the object of the invention to provide a burrowing apparatus which is free from the aforementioned disadvantages and in particular one which has a longer life than the conventional drills.
  • the percussion tip is arranged in the housing of the driving drill and is displaceable in the axial direction thereof being supported on the housing in the working direction via a spring member.
  • FIG. 1 shows a longitudinal section through a driving drill according to the invention
  • FIG. 2 is a detailed sectional view of another driving drill according to the invention.
  • FIGS. 3 to 6 are longitudinal sectional views showing equivalent details of a third driving drill according to the invention, in different operative positions, with a control device;
  • FIG. 7 is a perspective view of a mount for introducing the driving drills according to FIGS. 1-6 into the soil;
  • FIG. 8 is a sectional view of a driving drill according to the invention for opening up or widening an existing earth bore
  • FIG. 9 shows a side elevation an aiming frame for aligning the driving drills
  • FIG. 10 is a schematic view showing a driving drill according to the invention in tandem arrangement.
  • FIGS. 11 and 12 are partial views showing in detail steering devices for a driving drill according to the invention.
  • the housing 1 of a driving drill consists of a honed commercial hydraulic tube, chromed for protection against corrosion and to reduce wear, having an outside diameter of between -95 mm, and provided at both ends with an internal thread.
  • a bushing 2 is screwed into one end of housing I.
  • the bushing 2 has a collar 3 of the same diameter as housing 1, with the collar 3 being provided with bores 4 to enable engagement by a hook wrench for turning of the bushing 2.
  • the bushing 2 includes external threads located axially rearwardly of the collar 3 configured to engage the internal thread of housing 1.
  • a threaded porof bushing 2 located axially forwardly of the collar 3 is configured to engage a housing front portion 5, which has the same diameter as the collar of bushing 2 and as the housing 1.
  • the portion 5 embraces by a collar 6 a pin 7 of a conical percussion tip 8, which again has the same outside diameter as collar 3 of bushing 2 and as the housing 1 and which embraces the housing portion 5 at an offset 9 with a collet 10.
  • a collar 11 is attached, for example, by screw threads or the like, which guides the percussion tip 8 in the housing front portion 5 and which has bores 12 extending axially rearwardly thereof to enable engagement by a socket wrench.
  • a compression spring 13 held in tension about the pin 7 by the collar 11.
  • the adjustable initial tension of spring 13 assures that in the starting position shown the percussion tip 8 bears with its housing-side end face against collar 6 of the housing front portion 5. Direct contact is prevented, however, by an elastic disk 14 arranged between the percussion tip 8 and the housing front portion. All screwed parts are secured against detachment by locking plates.
  • an intermediate piston 15 which in the starting position shown bears against pin 7 of the percussion tip 8 bears against pin 7 of the percussion tip 8, a pneumatically moved percussion piston 16 is caused to strike against pin 7 of percussion tip 8, so that the percussion tip lunges for ward from the housing front portion 5 into the soil.
  • the intermediate piston 15 contributes to the crushing, for example of stones which cannot be pushed aside, by the vibrating percussion tip preceeding the housing, and for this purpose it is arranged in bushing 2 for displacement in axial direction and is supported in bushing 2 by a collar 17 on elastic buffers 18 arranged in the axial direction before and behind the collar.
  • the housing 1 follows this movement under the pressure of spring 13 and of the elastic buffers 18.
  • the buffers 18 are held in the bushing 2 by another collar 19 of bushing 2 and by a disk 20 secured in bushing 2 by a spring ring 30.
  • the intermediate piston 15 forms a sub-assembly with bushing 2 and the elastic buffers 18, as does also the housing tip 5 with the percussion tip 8, collar 11 and plate springs 13.
  • the condition of the spring member formed by the springs 13 is such that the amount of its compression, in what in the operating direction is the frontmost position of the percussion tip in the housing, is equal to or smaller than the maximum permissible amount.
  • the percussion piston 16 is guided in housing 1 by means of two guide rings 32, 33 arranged at an axial distance from each other on its shell 31 and is provided with slide rings 34 at the guide rings 32 and 33 to reduce the friction at housing 1.
  • the guiding of the percussion piston 16 with the rings 32 and 33 insures sufficient freedom of movement for the percussion piston 16 even if housing 1 is twisted to a relatively high degree.
  • the percussion piston 16 slides with its bored rear end, viewed in the direction of the percussion tip, sealing engaged on a control bushing 35, which is held with a collar 36 in an offset of the internal bore of the housing by a sleeve 37 screwed into the respective housing end and having a slightly larger diameter, in the portion protruding from housing 1, than the housing 1.
  • the control sleeve 35 has a connecting piece 38 designed as a flexible tube for connection to a compressed air line of a compressor (not shown).
  • the compressed air coming from the compressor passes, in the operative state, through an internal bore 39 of the control sleeve 35 into the bored end of the percussion piston 16, so that the percussion piston is accelerated in the direction of the percussion tip 8.
  • the percussion piston 16 moves in the housing 1 against the intermediate piston 15.
  • the percussion piston 16 is provided between the guide rings 33 and 32 at the shell 31 with an external recess which at the front guide ring 33-in the direction of movement-is connected via an axial groove 40 with the housing cavity present between percussionpiston 16 and intermediate piston and via a bore 41 in shell 31 with a recess 42 at the outer circumference of the control sleeve 35 extending as an external opening.
  • the connection with recess 42 in control sleeve 35 is interrupted by a suitable limitation of recess 42 or respectively a suitable arrangement of bore 41 in shell 31 of the percussion piston 16 approximately after one half of the distance traveled up to the intermediate piston, and the housing cavity lying before the percussion piston 16-in the direction of movement-is closed.
  • the cutting ring screw connection is composed of: a ring 45 which is located within the protective tube 44; a ring 46 which extends externally about the protective tube 44, is press-fitted with protective tube 44 into the internal bore of sleeve 37, and in so doing becomes clamped between sleeve 37 and in the outer side of pro tective tube 44; and a cap nut 47 screwed onto sleeve 37, to press the ring 46 with the protective tube 44 into sleeve 37.
  • a simple clamping ring may be provided instead of the ring 46, i.e., the protective tube 44 may be drawn into sleeve 37 while being clamped between the ring 45 and the similarly clamping ring which may be additionally slit in the axial direction.
  • the housing front portion 61 is screwed directly into the housing and comprises a percussion tip 62 in the form of a round chisel, which at the front end--taken in the working direction-is designed as a hollow chisel by an inward arch equal to the arch of a spherical surface.
  • a piston 66 and a pin 63 are formed at the other end of the tip 62 at the other end of the tip 62 .
  • Pin 63 forms the strike surface for the respective percussion piston and is present, in the starting position shown, in the internal bore of a ring 64 which is attached, for example by screw threads or the like, with the housing front portion 61 into the housing 60.
  • Ring 64 limits the movement of piston 66 against the working direction of the percussion tip 62.
  • the movement in the working direction is limited by an offset 65 of the piston bore formed in the housing front portion 61 within which piston 66 is slidably movable.
  • the percussion tip 62 is supported on the housing front portion 61 by way of piston 66 and plate spring 67, which move the percussion tip 62 back into its starting position from its-in working direction in the housing front portion 61frontmost position after each percussion.
  • the intermediate piston with its elastic suspension insures that the percussion tip 8 does not execute a movement inadmissible for the plate spring 13 despite a mass which is small in relation to the mass of the percussion piston 16, i.e. while in FIG. 1 the intermediate piston 15 prevents an inadmissible compression of the compression spring 13, an inadmissible compression of the plate spring 67 according to FIG. 2 is prevented by the offset 65.
  • a ring 68 placed on the housing front portion 61, whose diameter is larger than housing 60 and housing front portion 61.
  • Ring 68 tapers in adaptation to the housing front portion 61 in the working direction of the percussion tip 62 and pushes the soil aside so that a bore is formed in the soil whose diameter is greater than the housing diameter, and that the friction of housing 60 with the soil is considerably reduced.
  • the seat of ring 68 on the housing front portion 61 is selected so that it detaches from the housing front portion 61 when, for example in the case of a bore hole extending in an undesired manner, the driving drill is to be positioned anew and the housing is, for this purpose, moved backward out of the soil by reversal of the respective percussion piston.
  • profile grooves which, extending crosswise to the longitudinal direction of the housing, largely prevent retraction of the housing 60 during the return stroke of the percussion in piston.
  • a sawtooth profile such as that shown in FIG. 2 on the outer surface of housing 60 with teeth pointing backward in relation to the percussion tip, has proved particularly advantageous.
  • the sleeve 143 cooperates with a control sleeve 135, a spring 136, and a ring 137.
  • the control sleeve is designed as a tube which is mounted for sliding movement in the ring 137, fastened in the housing and provided with passage openings 101 for the air escaping from the housing.
  • Ring 137 has a sleeve type prolongation 138, in which are present, at two different points, on a circular circumference, a number of radial bores for balls 139.
  • the balls 139 engage in two annular grooves 140 and 141 of the control sleeve 135.
  • the balls 139 are held in the fixed position by the spring-loaded sleeve 143 which slides in the housing of the driving drill.
  • sleeve I43 slides from the shown starting position with recesses 144 over the balls 139, which release the balls 139 to the extent that they can just slide out of the annular grooves 140 and 141 when the compressed air supply is interrupted and spring 136 pushes the control sleeve into the operative position for forward running.
  • a protective tube may be selectively screwed to the housing end of the driving drill, the screw connection taking place on the sleeve with which ring 135 is clamped in the housing and which is provided with several grooves extending in axial direction and interrupting the screw thread for the protective tube.
  • the grooves give the sleeve the effect of a screw tap, that is, by the grooves the protective tube can be screwed onto the sleeve without prepared thread and the sleeve cuts into the protective tube with its screw thread.
  • a so-called wire grip can be used for the attachment of the protective tube.
  • the protective tube can moreover be provided with openings and be used for drainage if it remains in the soil.
  • a percussion tip 109 which, though being designed as a hollow chisel like the percussion tips according to FIG. 2 and being mounted displaceably and elastically in the housing, has a displacement cone 110 with a collet 111 which, like the collet of percussion tip 8 according to FIG. 1, cooperates with the housing tip.
  • the displacement cone 110 is mounted on a conical intermediate piece of the percussion tip 109, and as the cone tapers in the working direction of the percussion tip 109, it is thereby firmly connected in the working direction with the percussion tip without additional aids, while being easily releasable counter to the working direction.
  • a mount 75 is shown, with which the driving drill according to the invention is introduced into the soil at the beginning of each drilling operation and brought into the starting position required for a desired earth drilling.
  • the mount 75 has two jaws 76 and 77 adapted to the contour of the housing, which receive the housing of the driving drill between them and give the housing a position parallel to the longitudinal axis of the mount.
  • the jaws 76 and 77 are fastened to the mount 75 for pivotal movement by means of parallel links 78 and 79, and at the area of contact with the housing they have a greater distance from the housing diameter when the parallel links 78 and 79 are in the vertical position or at right angles to the longitudinal axis of the mount.
  • the percussion piston moves back and forth in the housing forces and forces equal in sum act on the housing in each axial direction of the housing.
  • the force acting on the housing in the working direction of the percussion tip leads, with adequate design of the extension spring 80, to a pivotal movement of the jaws 76 and 77 counter to the force of the extension spring 80.
  • the jaws 76 and 77 then open, and the housing slides through between them by its residual energy.
  • the mount 75 For anchoring in the ground, the mount 75 is connected with a bottom plate 88, which is anchored in the soil with bottom nails 81 before alignment of the mount 75. For its alignment the mount 75 is pivoted about a horizontal and a vertical axis.
  • mount 75 is connected with the bottom plate 88 via a cardan joint formed by a turntable 89 arranged for rotary movement on the bottom plate 88 and a pivotable suspension of mount 75 in lugs of turntable 89.
  • turntable 89 After aligning, i.e. after pivoting about the vertical axis, turntable 89 can easily be fixed in its pivoted position with an adjusting screw 91.
  • the aligning itself is facilitated by a bubble level, a type of water level, and by a sight 82.
  • the sight 82 includes a rod 83 at eye level which is inserted into the mount 75 perpendicular to the longitudinal axis thereof and carries at the upper end, on a cross beam 84, a rear sight 85 and a front sight 86 with sighting line parallel to the' longitudinal axis of the mount for sighting a reference point.
  • the housing ofthe driving drill rests in mount 75 in the jaws 76 and 77 and on a shell type support 87 arranged at a distance from the jaws 76 and 77.
  • the support 87 not only improves the parallel position of the housing between the jaws 76 and 77, as it reduces the bending load of the jaws 76 to a negligibly small amount, but it also facilitates the insertion of the housing between the jaws 76 and 77 and the provision of a protective tube embracing the compressed air line to the housing and possibly the cable line.
  • FIG. 8 shows a driving drill according to FIGS. 3 to 5 converted for the boring open (widening) of an existing earth bore.
  • a displacement cone is arranged on the percussion tip 109 and the housing of the driving drill is surrounded with an additional shell 121.
  • the displacement cone 120 has a cylindrical piece of the same or a slightly smaller diameter than the existing earth bore.
  • the outside diameter of the displacement cone 120 equals that of the shell 121 and determines the diameter of the earth bore during the wid' ening thereof.
  • the direction finding frame 122 has a plumb line 123 and is set for aligning, with feet 124 adapted to the housing of the driving drill, on the housing of the driving drill indicated in dash-dot lines in FIG. 9.
  • the driving drill is connected in tandem arrangement according to FIG. 10 with a parallel lying guide body 125.
  • the guide body 125 is connected, for example by screwing, with the housing of the driving drill, which in FIG. 10 is marked 126, and is introduced into the existing bore with its front portion protruding relative to the percussion tip of the driving drill, to make a second earth bore, parallel to the first, at the same outside diameter as the housing of the driving drill.
  • the driving drill having been set in operation, it drills a second bore parallel to the first, of the same diameter.
  • the first bore suffers no adverse change due to the protrusion of the guide body 125 and its length from the driving drill, i.e. by the displacement work thereof.
  • the wings 127 are disposed at any point of the housing of the driving drill lying diametrically opposite in pairs, are connected with the housing rigidly or articulatedly, and steer the driving drill according to its inclinationto the longitudinal axis of the housing automatically in a certain are through the soil, so that for example traversal beneath streets of low crown can also be accomplished with the driving drill at sufficient depth without any excavation of earth for positioning the driving drill.
  • the wings 127 have a form tapering in the working direction of the driving drill and are connected with the housing of the driving drill either rigidly or articulatedly.
  • the articulated connection permits the adjustment of the wing inclination to the longitudinal axis of the housing and hence a selection of the are on which the driving drill moves through the earth, or respectively it makes possible an adaptation to the nature of the ground to be traversed.
  • the articulated connection of the wings 127 includes a pin 129 fastened to the housing of the driving drill, on which is mounted for rotary movement a hub 130 which is welded, for example, to one end of the respective wing 127.
  • a trunnion screw 131 In the other end of wing 127 is mounted a trunnion screw 131, which extends by its trunnion into one of several bores 132 arranged in the housing on a corresponding circular circumference around the pivot axis of the wing 127.
  • a curved stiff protective tube 44a which, like the housing in FIG. 11, is shown in detail in FIG. 12 and is provided selectively with wings 128.
  • the wings are preferably curved in the same amount as the protective tube and arranged lying opposite in pairs at the protective tube, parallel to the longitudinal axis thereof.
  • Pneumatic burrowing apparatus particularly suitable for earth drilling comprising a tubular housing including a leading end adapted to act as the anterior of said apparatus during a burrowing operation, a percussion tip mounted in said housing at said leading end and including a rearwardly directed portion extending interiorly of said housing, said tip being arranged for axial movement relative to said housing, a percussion piston mounted for reciprocating motion within said housing and arranged to strike said percussion tip to impart a forwardly directed force thereto, pneumatic means including an energy source for imparting a striking force to said piston, spring means mounted between said percussion tip and said housing and arranged to be compressed therebetween upon relative movement of said tip forwardly of said housing, and a displacement cone mounted proximate said leading end for forward movement with said housing during a burrowing operation, said displacement cone being loosely slidable relative to said housing in a direction forwardly thereof.
  • Apparatus according to claim 1 including an adjustable stop member axially displaceable relative to said housing engaging said spring means for enabling adjustment of the spring force thereof.
  • Apparatus according to claim 1 including stop means engaging said percussion tip to limit movement of said tip relative to said housing.
  • Apparatus according to claim 1 including profile grooves arranged upon the outer surface of said tubular housing and extending transversely to the longitudinal direction of said housing.
  • Apparatus according to claim 1 including a protective tube attached to the rear end of said housing taken relative to the working direction of said percussion tip.
  • Apparatus according to claim 1 including a guide body attachable alongside of said tubular housing and extending generally parallel thereto.
  • Apparatus according to claim 1 including steering wings adjustably attachable to the exterior of said hous- 10. Apparatus according to claim 1 including a curved stiff protective tube attachable to said housing.
  • Apparatus according to claim 1 including an intermediate piston arranged in the line of action between said percussion piston and said percussion tip and being displaceable in the direction of movement thereof.
  • Apparatus according to claim 13 wherein said percussion tip is arched inwardly in the form of a spherical cap at the respective end face thereof extending toward the leading end of said apparatus in the working direction thereof.
  • Apparatus according to claim 13 wherein said percussion tip chisel comprises a circular cross sectional configuration. wherein said displacement cone is mounted upon said chisel and is arranged at a distance from said chisel tip which is a multiple of the diametral dimension of said chisel.
  • Apparatus according to claim 1 including a control sleeve mounted within said housing and having an internal bore designed as a compressed air inlet and being provided at its circumference with at least one air channel, said percussion piston being hollow at a rear end thereof taken in the working direction of said piston, said piston sliding by its hollow rear end in the space between said control sleeve and the inner wall of said housing and simultaneously forming a seal on said control sleeve and on the inner wall of said housing, there being provided in the hollow rear end of said percussion piston an opening which extends over at least one channel to the front end face of said percussion piston taken in the working direction thereof, said channel corresponding during the working stroke of said percussion piston with the channel in said control sleeve alone and during the return stroke of said combustion piston with the internal bore of said control sleeve alone.
  • Apparatus according to claim 16 wherein said control sleeve is displaceably arranged within said housing, with the displacement path of said control sleeve being limited by stop means, with a force exerted on said housing by said percussion piston in the working direction thereof being greater in one fixed position and smaller in another fixed position than the force ex- 12 erted on said housing in the opposite direction.
  • Apparatus according to claim 1 including a mounting assembly adapted to have said burrowing apparatus mounted therein for guiding said apparatus during a burrowing operation.
  • Apparatus according to claim 18 wherein said mounting device is provided with a return barrier consisting of two jaws held in a pair of spring loaded parallel links which are at the areas of contact with said housing in a vertical position of said parallel links arranged at a distance from each other which is greater than the outside diameter of said housing.
  • Apparatus according to claim 18 wherein said mounting device includes an aiming frame with a plumb line device enabling positioning of said mount.
  • said mounting device includes a bottom plate and a cardan joint interconnecting said mounting device with said bottom plate, said mounting device being adjustably positionable relative to said bottom plate to enable fixation thereof in the earth.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
US307573A 1971-11-18 1972-11-17 Burrowing apparatus Expired - Lifetime US3865200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7326183A FR2207300A1 (enrdf_load_stackoverflow) 1972-11-17 1973-07-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712157259 DE2157259C3 (de) 1971-11-18 1971-11-18 Rammbohrgerät

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US3865200A true US3865200A (en) 1975-02-11

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US307573A Expired - Lifetime US3865200A (en) 1971-11-18 1972-11-17 Burrowing apparatus

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US (1) US3865200A (enrdf_load_stackoverflow)
JP (1) JPS5418486B2 (enrdf_load_stackoverflow)
DE (1) DE2157259C3 (enrdf_load_stackoverflow)
FR (1) FR2161732A5 (enrdf_load_stackoverflow)
GB (1) GB1392868A (enrdf_load_stackoverflow)
KE (1) KE2577A (enrdf_load_stackoverflow)

Cited By (29)

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US4078619A (en) * 1975-10-01 1978-03-14 Boris Vasilievich Sudnishnikov Reversible air-operated apparatus of the percussive type for driving holes in ground by compacting same
US4100980A (en) * 1975-05-31 1978-07-18 Jenne & Strahm Ag Fur Tiefbautechnik Self-propelled pneumatic burrowing device
US4250972A (en) * 1978-05-12 1981-02-17 Paul Schmidt Pneumatic ram boring device
US4298074A (en) * 1976-08-09 1981-11-03 American Safety Equipment Corporation Surgical device using impulse motor
DE3124524A1 (de) * 1981-06-23 1983-01-13 Gustav Dr.-Ing. 4300 Essen Jenne Rammkopf fuer selbstgetriebene pneumatische rammbohrgeraete
US4596292A (en) * 1985-04-18 1986-06-24 The Stanley Works Subsoil penetrating apparatus
US4886128A (en) * 1987-03-27 1989-12-12 Helmuth Roemer Ram boring implement having a movable bit
EP0362481A3 (de) * 1988-10-05 1991-01-30 Schmidt, Paul, Dipl.-Ing. Rammbohrgerät
US5031706A (en) * 1990-02-07 1991-07-16 Mbs Advanced Engineering Systems Pneumopercussive soil penetrating machine
US5172771A (en) * 1990-11-06 1992-12-22 Charles Machine Works, Inc. Reversible impact-operated boring tool
US5226487A (en) * 1990-02-07 1993-07-13 Mbs Advanced Engineering Systems Pneumopercussive machine
US5311950A (en) * 1993-04-19 1994-05-17 Spektor Michael B Differential pneumopercussive reversible self-propelled soil penetrating machine
US5337837A (en) * 1993-06-17 1994-08-16 Earth Tool Corporation Dual-diameter pneumatic ground piercing tool
US5465797A (en) * 1994-02-22 1995-11-14 Earth Tool Corporation Pneumatic ground piercing tool with detachable head
US5467831A (en) * 1994-08-22 1995-11-21 Spektor; Michael B. Monotube differential pneumopercussive reversible self-propelled soil penetrating machine with stabilizers
US6138775A (en) * 1997-06-13 2000-10-31 Tracto-Technik Paul Schimdt Spezialmaschinen Boring machine
WO2002077406A1 (de) * 2001-03-17 2002-10-03 Tracto-Technik Gmbh Schlagbohrkopf
US6488105B1 (en) * 1999-01-04 2002-12-03 California Institute Of Technology Method and apparatus for subsurface exploration
US20040089473A1 (en) * 2000-04-26 2004-05-13 Kayes Allan George Backreaming tool
US20060088384A1 (en) * 2004-10-22 2006-04-27 Putnam Samuel W Stored energy coupling and pipe bursting apparatus
US20060207794A1 (en) * 2005-03-16 2006-09-21 Spektor Engineering Inc. Reversible penetrating machine with a springless pneumatically loaded differential air distributing mechanism
US20070175646A1 (en) * 2005-10-20 2007-08-02 Allied Construction Products, L.L.C. Underground piercing tool
US20070206995A1 (en) * 2003-10-23 2007-09-06 Geotechnical Reinforcement, Inc. Apparatus and method for building support piers from one or successive lifts formed in a soil matrix
US20080101873A1 (en) * 2000-06-15 2008-05-01 The Fox Family Trust Method and Apparatus For Building Support Piers From One or Successive Lifts Formed In A Soil Matrix
US7681658B2 (en) 2007-11-06 2010-03-23 Maurice DUVAL Pneumatic impact tool
US9115542B1 (en) * 2015-04-14 2015-08-25 GDD Associates, Trustee for Geo-diving device CRT Trust Geo-diving device
US9169611B2 (en) 2000-06-15 2015-10-27 Geopier Foundation Company, Inc. Method and apparatus for building support piers from one or more successive lifts formed in a soil matrix
US20160158819A1 (en) * 2014-12-03 2016-06-09 Paul E. Johnson Compact Pneumatic Auto Body Hammer with Fine Control of Impact Force
US11280134B2 (en) 2019-02-11 2022-03-22 Tracto-Technik Gmbh & Co. Kg. Ground drilling device, method for making a ground drilling device, method for maintaining a ground drilling device, and use of a ground drilling device

Families Citing this family (31)

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Publication number Priority date Publication date Assignee Title
AT334831B (de) * 1975-07-08 1976-02-10 Inst Gornogo Dela Sibirskogo O Umkehrbare pressluft-schlagvorrichtung zur bildung von bohrlochern im boden durch verdichten desselben
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DE2605010C2 (de) * 1976-02-10 1983-11-03 Paul 5940 Lennestadt Schmidt Starthilfe für Rammbohrgeräte
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SU1313972A1 (ru) * 1983-06-08 1987-05-30 Институт Горного Дела Со Ан Ссср Реверсивное устройство ударного действи дл проходки скважин в грунте
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JPS61282587A (ja) * 1985-06-05 1986-12-12 極東開発工業株式会社 逆進可能な地中貫孔機
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DE19617603C1 (de) * 1996-05-02 1997-09-18 Tracto Technik Umsteuerbares Rammbohrgerät
FI965300A7 (fi) * 1996-12-31 1998-07-01 Tamrock Oy Työkalu iskulaitetta varten
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US4078619A (en) * 1975-10-01 1978-03-14 Boris Vasilievich Sudnishnikov Reversible air-operated apparatus of the percussive type for driving holes in ground by compacting same
US4298074A (en) * 1976-08-09 1981-11-03 American Safety Equipment Corporation Surgical device using impulse motor
US4250972A (en) * 1978-05-12 1981-02-17 Paul Schmidt Pneumatic ram boring device
DE3124524A1 (de) * 1981-06-23 1983-01-13 Gustav Dr.-Ing. 4300 Essen Jenne Rammkopf fuer selbstgetriebene pneumatische rammbohrgeraete
US4462468A (en) * 1981-06-23 1984-07-31 Gustav Jenne Ram head for self-driven pneumatic ram drills
US4596292A (en) * 1985-04-18 1986-06-24 The Stanley Works Subsoil penetrating apparatus
US4886128A (en) * 1987-03-27 1989-12-12 Helmuth Roemer Ram boring implement having a movable bit
EP0362481A3 (de) * 1988-10-05 1991-01-30 Schmidt, Paul, Dipl.-Ing. Rammbohrgerät
US5031706A (en) * 1990-02-07 1991-07-16 Mbs Advanced Engineering Systems Pneumopercussive soil penetrating machine
WO1991012405A1 (en) * 1990-02-07 1991-08-22 Mbs Advanced Engineering Systems Pneumopercussive soil penetrating machine
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US5327636A (en) * 1990-11-06 1994-07-12 The Charles Machine Works, Inc. Reversible impact-operated boring tool
US5311950A (en) * 1993-04-19 1994-05-17 Spektor Michael B Differential pneumopercussive reversible self-propelled soil penetrating machine
US5337837A (en) * 1993-06-17 1994-08-16 Earth Tool Corporation Dual-diameter pneumatic ground piercing tool
US5465797A (en) * 1994-02-22 1995-11-14 Earth Tool Corporation Pneumatic ground piercing tool with detachable head
US5467831A (en) * 1994-08-22 1995-11-21 Spektor; Michael B. Monotube differential pneumopercussive reversible self-propelled soil penetrating machine with stabilizers
US6138775A (en) * 1997-06-13 2000-10-31 Tracto-Technik Paul Schimdt Spezialmaschinen Boring machine
US6488105B1 (en) * 1999-01-04 2002-12-03 California Institute Of Technology Method and apparatus for subsurface exploration
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US20080101873A1 (en) * 2000-06-15 2008-05-01 The Fox Family Trust Method and Apparatus For Building Support Piers From One or Successive Lifts Formed In A Soil Matrix
US9169611B2 (en) 2000-06-15 2015-10-27 Geopier Foundation Company, Inc. Method and apparatus for building support piers from one or more successive lifts formed in a soil matrix
US8152415B2 (en) 2000-06-15 2012-04-10 Geopier Foundation Company, Inc. Method and apparatus for building support piers from one or more successive lifts formed in a soil matrix
GB2391240A (en) * 2001-03-17 2004-02-04 Tracto Technik Percussion drill head
US20040112638A1 (en) * 2001-03-17 2004-06-17 Frank Hofmann Percussion drill head
GB2391240B (en) * 2001-03-17 2005-02-16 Tracto Technik Percussion drill head
WO2002077406A1 (de) * 2001-03-17 2002-10-03 Tracto-Technik Gmbh Schlagbohrkopf
US7093677B2 (en) 2001-03-17 2006-08-22 Tracto-Technik Gmbh Percussion drill head
US20070206995A1 (en) * 2003-10-23 2007-09-06 Geotechnical Reinforcement, Inc. Apparatus and method for building support piers from one or successive lifts formed in a soil matrix
US7901159B2 (en) 2003-10-23 2011-03-08 Geopier Foundation Company, Inc. Apparatus and method for building support piers from one or more successive lifts
US20060088384A1 (en) * 2004-10-22 2006-04-27 Putnam Samuel W Stored energy coupling and pipe bursting apparatus
WO2006047411A3 (en) * 2004-10-22 2008-11-13 Samuel W Putnam Stored energy coupling and pipe bursting apparatus
US7273113B2 (en) 2005-03-16 2007-09-25 Spektor Michael B Reversible penetrating machine with a differential air distributing mechanism
US20060207794A1 (en) * 2005-03-16 2006-09-21 Spektor Engineering Inc. Reversible penetrating machine with a springless pneumatically loaded differential air distributing mechanism
US7836976B2 (en) 2005-10-20 2010-11-23 Allied Construction Products, L.L.C. Underground piercing tool
US20070175646A1 (en) * 2005-10-20 2007-08-02 Allied Construction Products, L.L.C. Underground piercing tool
US7681658B2 (en) 2007-11-06 2010-03-23 Maurice DUVAL Pneumatic impact tool
US20160158819A1 (en) * 2014-12-03 2016-06-09 Paul E. Johnson Compact Pneumatic Auto Body Hammer with Fine Control of Impact Force
US9115542B1 (en) * 2015-04-14 2015-08-25 GDD Associates, Trustee for Geo-diving device CRT Trust Geo-diving device
US11280134B2 (en) 2019-02-11 2022-03-22 Tracto-Technik Gmbh & Co. Kg. Ground drilling device, method for making a ground drilling device, method for maintaining a ground drilling device, and use of a ground drilling device

Also Published As

Publication number Publication date
KE2577A (en) 1975-11-25
FR2161732A5 (enrdf_load_stackoverflow) 1973-07-06
GB1392868A (en) 1975-05-07
JPS5418486B2 (enrdf_load_stackoverflow) 1979-07-07
DE2157259C3 (de) 1973-06-07
DE2157259B1 (de) 1972-11-09
JPS4872001A (enrdf_load_stackoverflow) 1973-09-28

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