WO2000006835A1 - Excavateur de tranchees - Google Patents

Excavateur de tranchees Download PDF

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Publication number
WO2000006835A1
WO2000006835A1 PCT/NZ1999/000122 NZ9900122W WO0006835A1 WO 2000006835 A1 WO2000006835 A1 WO 2000006835A1 NZ 9900122 W NZ9900122 W NZ 9900122W WO 0006835 A1 WO0006835 A1 WO 0006835A1
Authority
WO
WIPO (PCT)
Prior art keywords
trenching apparatus
trench
digging
trenching
apparata
Prior art date
Application number
PCT/NZ1999/000122
Other languages
English (en)
Inventor
Stephen George Arthur Fenton
Original Assignee
Stephen George Arthur Fenton
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stephen George Arthur Fenton filed Critical Stephen George Arthur Fenton
Priority to AU54527/99A priority Critical patent/AU5452799A/en
Publication of WO2000006835A1 publication Critical patent/WO2000006835A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/08—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging wheels turning round an axis
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels

Definitions

  • This invention relates to trenching apparatus.
  • the trenching apparatus will be most commonly used for digging drainage channels or trenches or cleaning out such trenches or channels, along the side of roads, on rural sites, and on other properties.
  • the trenching apparatus will be most commonly used to create such trenches and channels in most soils, but in particular peat. However, the trenching apparatus may also be used to create drainage channels and so forth in range of soil types including clay.
  • such equipment operates in conjunction with, and is attached to the power take-off drive or hydraulic apparatus of another vehicle - such as a tractor, or an excavator.
  • Available trenching equipment may include a combination of blades, scoops or discs which may be either fixed or pivotally mounted to a frame to enable the equipment to scrape, dig, and scoop out earth and so forth to create a trench of a particular depth and width.
  • SUBSTITUE SHEET Rule 26 Other types of trenching equipment may incorporate a scoop to scoop out loosened or poorly compacted material from the trench. However, the scoops typically tip the material along side the edges of the trench where it can then be washed back into the trench in unfavourable weather conditions. The material collected in the scoop may also be emptied into a trailer of a vehicle for dumping elsewhere. The removal and dumping of unwanted material increases both the cost and the labour involved in trenching operations. Alternately, the collected material may be spread over pastures or adjacent land. Such spreading can be uneven and can result in pasture damage.
  • trenching apparatus/excavators as described above are not typically designed to accommodate the problems encountered when creating water channels in peat.
  • Peat by its nature can create a range of problems for existing trenching systems.
  • Peat soils can be spongy, have a greater water content than other soil types and can become easily compressed.
  • drain spinners Another type of trenching/excavating system is therefore commonly used for excavating peat soils. These are known as drain spinners. Typically drain spinners include a circular disc with a number of blades arranged around the perimeter of the disc (as described in New Zealand Patent Application No. 192469). As the disc rotates, the blades dig into and lift the peat out of the trenches being created. Unfortunately, similar problems arise with the use of this system as previously described systems, insofar as excavated material is again discharged unevenly on adjacent pasture or ground with detrimental consequences for pasture growth, and problems consequent on erosion and so forth.
  • Yet other systems include rotating drums which include blades or paddles for removing loosened material from a trench to create a drainage channel and so forth. Again this system operates by the blades lifting loosened material from the trench. The material is again unevenly disbursed on adjacent pasture or piled up for later dispersal along side the trenches.
  • d) be able to not only dig and clear trenches of soil, peat or wood debris material, but also be capable of lifting and removing a certain amount of water from the trenches being dug;
  • SUBSTITUE SHEET Rule 26 apparatus capable of preparing and maintaining at least one surface, including a body, the body including framing capable of supporting multiple digging apparatus.
  • Trenching apparatus substantially as described above wherein the framing of the body is configured to form a substantially open frame work.
  • Trenching apparatus substantially as described above wherein the framing is configured to complement the required shape of a trench being prepared and maintained.
  • Trenching apparatus substantially as described above wherein the framing is configured to be substantially cone-shaped.
  • Trenching apparatus substantially as described above wherein the digging apparata on the framing are configured in a substantially spiral arrangement around the body.
  • Trenching apparatus substantially as described above wherein the digging apparata can be configured to project at an angle from the framing.
  • a trenching apparatus substantially as described above wherein the body of the trenching apparatus rotates to enable the digging apparatus to prepare and maintain the trench being excavated.
  • Trenching apparatus substantially as described above wherein the trenching apparatus is laterally disposed relative to a vehicle with which the trenching apparatus is used.
  • trench shall mean any trench, channel or ditch excavated for whatever purpose including preparation and maintenance of a water course for drainage, or as a boundary trench and so forth. Accordingly, use of this term is not to be seen as limiting.
  • drain spinner For ease of reference, the trenching apparatus shall now be referred to as a drain spinner.
  • This term is used in the prior art to describe trenching systems that incorporate flat discs with digging blades bolted around the perimeter of the disc, and where such discs rotate.
  • drain spinner is used simply because the trenching apparatus rotates when it is activated and this rotation or spinning is required to enable the trenching apparatus to excavate a trench or drain. Therefore, use of this term is not to be seen as limiting the invention.
  • blades includes any form of blade, paddle, teeth and so forth of any shape or configuration as required to perform the function of the digging apparata of the present invention.
  • the framing of the body of the drain spinner includes multiple bars that are fixedly attached along their length to the perimeter of a number of rings.
  • the rings serve as structural strengthening and/or shaping framework for the attached bars.
  • SUBSTITUE SHEET Rule 26 and the diameter of the rings comprising the framing may vary depending upon the configuration required to enable the drain spinner to excavate trenches for specific purposes.
  • the framing of the body of the drain spinner required to excavate a trench for field tiles may be differently configured to the framing of the body used to create an open drainage channel.
  • the open framework of the drain spinner may be achieved by an appropriately cut and moulded external surface of sheet metal, attached to an internal framework of any combination of rings and/or structural stays.
  • the primary and secondary bars are configured in an alternating arrangement.
  • the diameter of the rings vary such that the narrowest diameter rings are positioned towards the point of attachment of the body to a vehicle, and the wider diameter rings preferably being located furthest from the point of attachment of the drain spinner to the vehicle. Accordingly, when the bars are attached to the rings, the body is configured to be substantially cone-shaped for most of its length with the bars radiating upwards and outwards from the point of attachment of the body of the vehicle.
  • the bars of the framing may be configured to include an angled portion.
  • the diameter of the outermost ring is less than that of the next adjacent inner ring such that the bars when attached to the outermost ring are substantially angled inwards.
  • this portion of the body converging in towards the centre of the body contributes to defining a trench having the required depth, width and overall configuration to suit the particular purpose for which it is excavated.
  • the width of the bar(s) to the diameter of the rings is designed to facilitate the discharge of surface material
  • the measurements relevant to one embodiment of the cone-shaped/diamond-shaped body include a bar width of approximately 80mm (millimeters) wide, whilst the diameter of the rings from the outer ring to the inner ring are 1.3m (metres), 1.5m, 1.14m, 0.78m and 0.4m respectively.
  • the width of the bar to the ring diameter in other embodiments may vary depending upon the width, and depth of the trench, and the specific purpose for which the trench is being excavated. Accordingly, the body may be otherwise configured to be more rounded, or drum-shaped and so forth as required.
  • each bar of the framing includes a number of digging apparata or blades.
  • the blades on a bar are offset relative to the position of the blades on adjacent bars. Accordingly, the blades are arranged in a substantially spiral configuration around the body. This arrangement facilitates a more uniform excavation of the trench, whilst at the same time minimising the need for large scoops or paddles as is often provided with the prior art systems.
  • each blade provides a 10mm cut, although cuts of up to 25mm may be achieved depending on the blade size, shape, position and projection from the frame. Small blades are preferable where there is a likelihood of encountering wood or debris material in the ground being excavated. The smaller blades are more efficient in breaking apart the debris, to facilitate its excavation with minimum damage to the blades.
  • the blades are distributed along the entire length of the bars.
  • the shape of the body and the positioning of the blades contribute to creating a trench that has a substantially flat bottom and at least one angled side-wall.
  • the shape of the trench can be dictated by the body shape and blade position, in order to create a trench for a specific purpose.
  • the blades are preferably fixedly attached to the bars of the framing. Accordingly, the blades may be welded onto the bars, or the bars and blades may be profile cut as required. This provides an
  • the blades extend or project at an angle from the surface of the bars. Having the blades projecting out from the bars enables the blades to dig into surface and scoop out the material being excavated from the trench.
  • the configuration of the drain spinner is such that material dug by the blades is scooped into the centre of the body.
  • the body rotates. Accordingly, whilst the blades are configured to dig into the surface and carry material into the centre of the body of the drain spinner, the rotational movement of the drain spinner creates a centrifugal force that discharges the material within the body out through the open frame work of the drain spinner. The material being excavated is therefore discharged from within the drain spinner and onto the surface of the ground adjacent to the trench being excavated.
  • the rotation of the body, the scooping action of the blades and the speed with which the drain spinner operates contribute to the production of what can be termed a "rooster tail" (a term commonly used in water sports) of both solid and liquids from the trench being excavated. Accordingly, even water can be picked up and lifted out of the trench. This is advantageous when digging trenches in peat soils which are water laden and where the presence of water could impede the ability of prior art systems to effectively and efficiently excavate the trench.
  • the rate of discharge and the pattern of discharge of both the solid materials and liquid is such that there is an even spread of the discharged solids and liquids onto a ground adjacent to the trench being excavated. Therefore, the present invention obviates the need to further spread the excavated material.
  • the pattern of discharge is such that a light coating of discharge material settles on adjacent ground. Accordingly, the discharged material is less likely to result in the type of
  • the invention may also incorporate an additional system to catch the discharged solid material to further control its displacement.
  • an automat a wide belt capable of catching the discharged material and then spreading it
  • This may be particularly appropriate to prevent sodden materials from being discharged over farm races, drives or adjacent roads or buildings.
  • An advantage of the present invention arising from the configuration of the body is that the body is capable of excavating a trench deeper than the radius of the body.
  • Some prior art systems are only able to excavate a trench of a depth equal to the radius of the apparatus, such as with drain spinners which comprise a flat disc with blades fixed around the perimeter of the disc.
  • the configuration of the present invention is ideally suited for excavating trenches in peat. There are inherent problems when excavating peat as it is soft and not abrasive.
  • the configuration of the body of the present invention has proven to be successful in the excavation of trenches in such material.
  • the present invention may also be used to excavate trenches in other soil types, including clays.
  • the configuration of the body contributes to the ease of operation of the drain spinner.
  • the configuration of the body contributes to the ease of operation of the drain spinner.
  • the drain spinner is adapted to attach to the three-point linkage of a vehicle such as a tractor or excavator.
  • a vehicle such as a tractor or excavator.
  • Such vehicles are well suited to the variety of terrains and ground conditions where trenches and water channels may be required.
  • the drain spinner is pulled behind a tractor.
  • the drain spinner may operate in front of the tractor or to the side.
  • the drain spinner it is preferable for the drain spinner to be pulled ridged mounted behind a tractor because of the undertow created by the rotation of the drain spinner and the way the blades dig into the ground. To some extent this undertow is compensated by including a ground wheel or skid that contributes to the stabilisation of the drain spinner during its operation. This is optional. The ground wheel also contributes to the stabilisation of the tractor pulling the drain spinner. This stabilisation is particularly important as the body of the drain spinner is preferably laterally disposed relative to the vehicle with which the drain spinner is used.
  • ground wheel is preferably positioned in front of the body of the drain spinner, in other embodiments the ground wheel may be positioned to follow the body of the drain spinner.
  • the ground wheel may take any configuration as is required to complement the operation of the drain spinner.
  • any other suitable stabilisation apparatus may be adapted for use with the invention.
  • counterweights may be employed as necessary and where required.
  • counterweights may be positioned on or about the vehicle or along the arm which is attached to the three- point linkage of the vehicle and which connects the drain spinner to the vehicle.
  • the arm that attaches the drain spinner to the vehicle and facilitates the operation of the drain spinner can take any suitable configuration.
  • a modified truck axle may be used.
  • the arm to which the drain spinner is attached is capable of pivoting and hinging to enable a portion of the arm to which the drain spinner is attached to be raised or lowered relative to the surface of the ground that is to be excavated. Accordingly, the drain spinner can be lowered to the ground surface and then activated in order to excavate the trench as required.
  • the drain spinner can be raised so as to be in a substantially vertical position (substantially perpendicular to the level of the ground) to enable the drain spinner to be transported to another location.
  • the arrangement of the arm is such that the drain spinner can be raised up and the arm can then be swung over the tractor (or swung laterally behind the tractor) to enable the drain spinner to be positioned on the opposite side of the tractor.
  • the drain spinner can be used to excavate trenches on either side of the tractor as required.
  • the body of the drain spinner when the trenching apparatus is laterally disposed from one side of the vehicle, the body of the drain spinner is capable of rotating in one direction. Accordingly, when the drain spinner is laterally displaced relative to the opposite side of the vehicle the body rotates in a counter direction.
  • the drain spinner will be activated by the hydraulic system of the vehicle with which it is used.
  • any system for driving the drain spinner is not limited.
  • SUBSTITUE SHEET Rule 26 may be employed as required.
  • the body of the drain spinner is preferably made from high abrasion steel.
  • High abrasion steel is preferred because of the wear and tear that the bars and the blades will be exposed to when excavating abrasive material in the surface being excavated.
  • peat is not as abrasive as some soils, the speed with which the drain spinner operates and the existence of debris within the peat can contribute to the speed with which the bars and the blades will be abraded.
  • cheaper versions may be constructed from mild steel.
  • Figure 1 Is a diagrammatic perspective view of the trenching apparatus and its accompanying ground wheel in a position ready to excavate a surface, and illustrated in conjunction with a vehicle with the trenching apparatus is used, in accordance with one embodiment of the present invention.
  • Figure 2 Is a diagrammatic perspective view of the trenching apparatus attached to an arm which in turn is attached to the vehicle with which the trenching apparatus is used, in accordance with one embodiment of the present invention.
  • SUBSTITUE SHEET Rule 26 maintaining at least one surface generally indicated by arrow (2).
  • the trenching apparatus 1 includes a body generally indicated by arrow (3).
  • the body includes framing (4) and (5).
  • the framing (4) and (5) is capable of supporting multiple digging apparata (or blades)(6).
  • the trenching apparatus (or drain spinner) (1) is typically pulled behind and driven by a vehicle (7).
  • the drain spinner (1) is laterally disposed relative to the vehicle (in this case a tractor) (7) with which the drain spinner (1) is used.
  • the drain spinner (1) is attached to an arm (8) that in turn is attached to the three- point linkage (not fully shown) of the vehicle (7).
  • the arm (8) is capable of pivoting at (9) to enable the drain spinner (1) to be operated between a position for transportation as shown in Figure 2, and a position for excavating as shown in Figure 1.
  • the drain spinner (1) may be laterally disposed relative to either side of the vehicle (7) with which the drain spinner (1) is used.
  • the arm (8) is raised and pivoted at (9) to enable the drain spinner (1) to also be raised and carried over the length of the tractor from one side of the tractor (7) to the other.
  • the position of the drain spinner (1) on either side of the tractor (7) may simply be achieved by moving the drain spinner (1) through a horizontal plane behind the tractor (7). Accordingly, drain spinner (1) can be used to create a trench (10) on either side of the vehicle with which the drain spinner (1) is used, if required.
  • the drain spinner (1) is preferably driven via power from the three-point linkage of the tractor (7) in conjunction with the hydraulic systems (11) of the tractor (7).
  • any suitable means of powering and operating the drain spinner (1) may be employed.
  • a ground wheel (12) may be employed.
  • the ground wheel (12) leads the drain spinner (1) as shown in Figure 1.
  • the ground wheel (12) may trail the drain spinner (1).
  • additional stabilising equipment such as counter-weights (not shown) may be employed to further stabilise the vehicle (7) and/or the drain spinner (1) during the trenching operation as required.
  • the body (3) of the drain spinner (1) includes framing comprised of bars (4) and rings (5) arranged in a substantially cone-shaped configuration.
  • the bars (4) radiate upwards and outwards from the base of the drain spinner (1) and are maintained in position by their attachment to the rings (5).
  • the bar width is approximately 80mm (millimeters).
  • the diameter of the rings (5) attached to the bars (4) on the interior surface of the cone have varying diameters as required to create the desired shape.
  • the diameter of the rings (5) from the outer ring furthest from the arm (8) are approximately 1.3m (metres), 1.5m, 1.14m, 0.78m and 0.4m.
  • the width of the bars (4) to the diameter of the rings (5) is important to create a sufficiently strong yet open frame work required to enable the drain spinner (1) to discharge excavated material effectively and efficiently.
  • the diameter of the rings (5) of other embodiments may accordingly vary depending on the required shape to effect a trench of the required depth, width and shape and to facilitate discharge of excavated material.
  • a portion of the bars (5) are angled inward at (13) to form an overall diamond-shaped body.
  • the overall shape of the drain spinner (1) may be configured as required to excavate trenches to the required width, depth and for a specific purpose. Accordingly, the drain spinner may be more circular in configuration or
  • SUBSTITUE SHEET (Rule 26 may be substantially drum-shaped.
  • the bars (4) of the framing include the digging apparata or blades (6).
  • the blades (6) on one bar are disposed relative to the blades (6) on adjacent bars such that the blades (6) are arranged in a substantially spiral configuration around the body (3).
  • the blades also preferably project from the surface of the bars (4) substantially at an angle.
  • the angular projection of the blades (6) from the bars (4) enable the blades (6) to dig into and excavate material from the surface (2) on which the drain spinner (1) is being used.
  • FIG. 1 and 2 framing of the body (3) forms a substantially open framework.
  • the open framework contributes to the operation of the drain spinner (1).
  • the body (3) rotates in a preferred direction.
  • the body (3) is lowered to the surface (2) to be excavated.
  • the blades (6) dig into and excavate the surface (2) and in so doing, carry the surface material to the inside of the body (3).
  • the rotation of the body (3) and the speed with which it operates, creates a substantially centrifugal force which in turn causes the material transferred to the inside of the body (3) to be discharged through the substantially open frame work of the body (3).
  • the discharged material is thrown up and out in a manner equating to a "rooster tail" typically associated with the water jet produced by racing boats travelling at speed.
  • the rate and pattern of discharge of the material is substantially even.
  • the material excavated from the trench (10) is discharged over ground adjacent to the trench in an even spread.
  • drain spinner (1) as shown in Figures 1 and 2 enable the drain spinner (1) to be used to excavate trenches (10) in peat.
  • the drain spinner (1) as shown in Figures 1 and 2, or as in other embodiments (not shown) can be used in other soil types including clay.
  • the blades (6) of the drain spinner (1) are of a size and configuration which
  • SUBSTITUE SHEET Rule 26 enables the blades to break apart wooden debris material typically found in peat, without undue damage caused to the blades (6).
  • the bars (4) and the blades (6) are preferably fixedly attached to each other. This may be achieved by welding the blades 6 to the bars (4). However, to maintain strength of the shape of the body (3), the bars (4) and blades (6) are preferably profile cut.
  • high abrasion steel is used in the manufacturer of the drain spinner (1).
  • mild steel may be used. Where mild steel is used, it must be remembered that surface material will ultimately wear the bars (4) and the teeth (6).
  • the ease of manufacture and the low cost of materials enables replacement drain spinners (1) to be manufactured relatively cheaply.
  • the present invention may also include an additional system for catching the material and controlling its displacement.
  • a system may include an automat (such as a wide belt) (not shown) for use with the drain spinner (1).
  • the drain spinner (1) is not only capable of drain excavation and clearing existing trenches (10) of built up debris, but also the body (3) is capable of picking up and lifting water out of the trenches (10) being excavated.
  • a further advantage of the present invention is the speed with which the drain spinner (1) can operate.
  • the configuration of the body (3) is such that drag or resistance during excavation of a trench (10) is much less than that encountered with the use of prior art systems. This is because some prior art systems cannot operate deeper than the radius of the excavating drum or discs. Accordingly, such systems encounter more drag and resistance and have a high power requirement.
  • many prior art systems are centrally mounted behind a vehicle. Accordingly such systems are unable to excavate trenches close to a fence line.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Soil Working Implements (AREA)

Abstract

Cette invention se rapporte à un excavateur de tranchée (1) le plus généralement utilisé pour creuser et entretenir des canaux de drainage/tranchées le long de routes, de clôtures et dans une grande variété de situations. Dans un mode de réalisation, cet excavateur de tranchée (1) comprend une structure (3) pouvant être reliée au système hydraulique/de prise de force (11) d'un véhicule (7). Cette structure (3) peut tourner autour de son axe radial et comporte un cadre essentiellement ouvert (4, 5) servant de support à de multiples éléments excavateurs (6). Cet excavateur de tranchée (1) se caractérise en ce que, pendant la rotation de la structure (3), les éléments d'excavation (6) transfèrent les matériaux solides et/ou les liquides dans la structure (3) à partir de la tranchée excavée ou entretenue. Ces matériaux/liquides sont ensuite déchargés de la structure en rotation (3) de façon sensiblement uniforme sur des surfaces adjacentes.
PCT/NZ1999/000122 1998-07-31 1999-07-29 Excavateur de tranchees WO2000006835A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54527/99A AU5452799A (en) 1998-07-31 1999-07-29 Trenching apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ33119398 1998-07-31
NZ331193 1998-07-31

Publications (1)

Publication Number Publication Date
WO2000006835A1 true WO2000006835A1 (fr) 2000-02-10

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Application Number Title Priority Date Filing Date
PCT/NZ1999/000122 WO2000006835A1 (fr) 1998-07-31 1999-07-29 Excavateur de tranchees

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AU (1) AU5452799A (fr)
WO (1) WO2000006835A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447106A (en) * 2007-03-02 2008-09-03 John Carrick Re-profiling moorland grip
WO2011044590A2 (fr) * 2009-10-09 2011-04-14 Quanta Associates, L.P. Appareil et procédé d'excavation
CN117846063A (zh) * 2024-03-08 2024-04-09 山西万家寨水控工程投资有限公司 一种水利施工开挖装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429131A (en) * 1967-03-22 1969-02-25 Charles F Martin Pipeline trenching apparatus
DE2805593A1 (de) * 1978-02-10 1979-08-16 Alfred Wehrle Einrichtung zum ausheben und/oder reinigen von graeben im gelaende, insbesondere von wassergraeben zu draenungszwecken o.dgl.
NZ192469A (en) 1979-12-20 1982-12-07 Bourgel R Trench digging machine vertical disc with blades throws soil forwardly onto defelctor
US5212892A (en) * 1992-10-15 1993-05-25 Maitlen C Gene Cutter head assembly for excavating machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429131A (en) * 1967-03-22 1969-02-25 Charles F Martin Pipeline trenching apparatus
DE2805593A1 (de) * 1978-02-10 1979-08-16 Alfred Wehrle Einrichtung zum ausheben und/oder reinigen von graeben im gelaende, insbesondere von wassergraeben zu draenungszwecken o.dgl.
NZ192469A (en) 1979-12-20 1982-12-07 Bourgel R Trench digging machine vertical disc with blades throws soil forwardly onto defelctor
US5212892A (en) * 1992-10-15 1993-05-25 Maitlen C Gene Cutter head assembly for excavating machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447106A (en) * 2007-03-02 2008-09-03 John Carrick Re-profiling moorland grip
GB2447106B (en) * 2007-03-02 2011-11-09 John Carrick The process of re-profiling the edges of a moorland grip with a conical roller
WO2011044590A2 (fr) * 2009-10-09 2011-04-14 Quanta Associates, L.P. Appareil et procédé d'excavation
WO2011044590A3 (fr) * 2009-10-09 2011-08-18 Quanta Associates, L.P. Appareil et procédé d'excavation
US8484866B2 (en) 2009-10-09 2013-07-16 Quanta Associates, L.P. Dig under apparatus and process
CN117846063A (zh) * 2024-03-08 2024-04-09 山西万家寨水控工程投资有限公司 一种水利施工开挖装置
CN117846063B (zh) * 2024-03-08 2024-05-24 山西万家寨水控工程投资有限公司 一种水利施工开挖装置

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