WO2008093131A1 - Excavatrice - Google Patents

Excavatrice Download PDF

Info

Publication number
WO2008093131A1
WO2008093131A1 PCT/GB2008/000378 GB2008000378W WO2008093131A1 WO 2008093131 A1 WO2008093131 A1 WO 2008093131A1 GB 2008000378 W GB2008000378 W GB 2008000378W WO 2008093131 A1 WO2008093131 A1 WO 2008093131A1
Authority
WO
WIPO (PCT)
Prior art keywords
machine
machine according
upper frame
frame
lower frame
Prior art date
Application number
PCT/GB2008/000378
Other languages
English (en)
Inventor
Stephen Paul Slater
Original Assignee
Jcb Compact Products Limited
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 Jcb Compact Products Limited filed Critical Jcb Compact Products Limited
Publication of WO2008093131A1 publication Critical patent/WO2008093131A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/003—Devices for transporting the soil-shifting machines or excavators, e.g. by pushing them or by hitching them to a tractor
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/34—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines

Definitions

  • the present invention relates to a machine for excavating.
  • Excavating machines have a working arm, with a boom moveably mounted on a mounting on part of a body of the machine, a dipper moveably mounted to an end of the boom remote from the mounting and a tool such as a bucket moveably mounted on a distal end of the dipper.
  • the working arm is operable to perform operations such as digging trenches, for example.
  • Such machines are typically wheeled or tracked machines, which have engines to provide motive power to drive the wheels or tracks and to power a pump to pressurise hydraulic fluid, to actuate hydraulic actuators of the working arm.
  • machines Whilst such machines are able to perform excavating operations, larger sized machines can be difficult to manoeuvre and operate in confined spaces, and such machines may not be able to reach sites with limited access, such as gardens. Additionally, such machines are usually slow-moving, which does not present a significant disadvantage when on a site where an excavating operation is to be carried out, but can be inconvenient when driving the machine to and from such a site.
  • Smaller excavating machines are available, although these machines generally need to be transported from a storage facility to a site where an excavating operation is to be performed, on a trailer, which can be inconvenient.
  • Other small excavators are known which can be hitched to a tow ball of a vehicle such as an automobile for towing to a site, but such excavators cannot move under their own power around the site and thus must be manually moved around the site.
  • a machine for excavating including a lower frame which mounts a pair of driveable ground engaging wheels towards a first end of the lower frame, and a non-drivable wheel assembly towards an opposite second end of the lower frame, there being a structure by which the machine may be towed provided by the lower frame at or towards the second end, the lower frame also carrying a power source for driving the driveable ground engaging wheels, and a fluid pump driven by the power source and being operative to provide a supply of pressurised fluid, and the machine including an upper frame which carries an operator's seat, the upper frame being rotatable relative to the lower frame about a substantially upright axis, and the upper frame providing, at a position in front of the operator's seat, a mounting for a working arm of the kind including a first arm part which is pivotal at or towards a first end, about a first generally horizontal axis relative to the upper frame by a first pressurised fluid actuated device, and
  • Such a machine can be towed from a storage facility to a work site by a vehicle such as an automobile, and can be driven around the work site under its own power to perform excavating operations, thus overcoming disadvantages associated with known excavating machines.
  • the upper frame is preferably rotatable between a transport position in which the mounting for the working arm faces generally towards the second end of the lower frame and a working position in which the mounting for the working arm faces away from the second end of the lower frame. This allows the working arm to be stowed in a safe position for transport, and helps to balance the weight of the machine when it is being towed by a towing vehicle.
  • a motor is provided to effect rotation of the upper frame, so that manual rotation of the upper frame is not required.
  • the upper frame is rotatable when the towing structure is engaged with a towing assembly of a towing vehicle, so as to allow the machine to be hitched to the towing vehicle with the upper frame in the working position, with the upper frame then being rotatable to the transport position.
  • the weight of the working arm can be used to assist in tilting the machine to engage the towing structure with a tow ball of a towing vehicle, with the upper frame then being rotatable to a transport position for safe transportation of the machine.
  • the mounting for the working provided by the upper frame arm permits the working arm to pivot through 180 degrees about a generally upright axis, thus to increase the flexibility of the machine in performing working, e.g. excavating, operations.
  • a working arm lock may be provided for holding the working arm in place when the upper frame is in the transport position, so as to impede undesired movement of the working arm during transport of the machine.
  • the working arm lock is preferably a mechanical lock.
  • an upper frame lock may be included for holding the upper frame in the transport position, to prevent rotation of the upper frame during transport of the machine.
  • the power source may be positioned towards the second end of the lower frame, to act as a counterweight when the working arm is in use.
  • the power source may be an internal combustion engine, and the engine may have an electric starting system. Alternatively, to minimise the weight of the machine, the engine may have a manual e.g. pull-start system.
  • the driveable ground engaging wheels are preferably each driven by a hydrostatic drive, which provides high torque for improved grip and mobility over difficult ground.
  • the driveable ground engaging wheels may be provided with pneumatic tyres, which may be approximately 350mm wide. Such tyres provide improved grip and stability for the machine.
  • the lower frame may include hollow frame members, to reduce the weight of the machine, and the hollow frame members may be tubular.
  • the machine may include stabilizers to improve stability when the working arm is in use.
  • the machine may include a dozer blade towards the first end of the lower frame, the dozer blade being moveable between lowered and raised positions.
  • the dozer blade allows the machine to be used for ground levelling operations. Additionally, e.g. during an excavating operation, the dozer blade can be lowered into engagement with the ground in front of the driveable wheels, thus reducing the likelihood of the machine tipping by providing a fulcrum, outwardly of and below the first end of the lower frame, so that greater force is required to cause the machine to tip than if the dozer blade were not present when the wheel axes may provide a fulcrum.
  • the weight of the machine is preferably less than 500 kg, allowing it to be towed by a vehicle such as an automobile.
  • the width of machine at its widest point, at least when in a condition for transport is preferably less than 1.5 metres.
  • One or more control joysticks may be mounted on the operator's seat to allow an operator to drive the machine and/or operate the working arm. Mounting the control joystick(s) on the operator's seat in this way helps to minimise the width of the machine.
  • FIGURE 1 is a perspective view of a machine for excavating according to the present invention, with the working arm in the working position;
  • FIGURE 2 is a perspective view of the machine of Figure 1 , with the working arm in the transport position;
  • a machine for excavating in accordance with the present invention is shown generally at 10 in the accompanying drawings.
  • the machine 10 has a lower frame 12, on which a pair of driveable wheels 14 are mounted, towards a first end of the lower frame 12.
  • the driveable wheels 14 are fitted with pneumatic tyres 15, which in this example are approximately 350mm wide. Such tyres 15 provide good grip and stability for the machine 10.
  • Hydraulic motors which form part of a hydrostatic drive, may be mounted in each of the hubs 14a of each of the driveable wheels 14, for driving the machine 10. Alternatively, the hydraulic motors may be mounted elsewhere, with a final drive such as a drive chain being provided to couple the hydraulic motors to the driveable wheels 14.
  • a non-driveable wheel assembly 16 is mounted towards a second end of the lower frame 12.
  • the non-driveable wheel assembly 16 is a generally conventional jockey wheel assembly, having a wheel 22 which is freely rotatable about a generally horizontal axis.
  • a handle 24 is provided on an upper part of the non-driveable wheel assembly 16, to permit the non- driveable wheel assembly 16 to be raised and lowered.
  • a towing structure 26 is provided towards the second end of the lower frame 12, the towing structure 26 having a socket 28 in which a tow ball of a vehicle can be received, permitting the machine 10 to be towed by a vehicle such as an automobile.
  • a lifting handle 30 may also be provided towards the second end of the lower frame 12, to permit the towing structure 26 of the machine 10 to be lifted manually into a position in which the socket 28 can receive the tow ball of the towing vehicle.
  • the weight of the machine should be minimised.
  • the total weight of the machine 10 excluding an operator, is less than 500 kg, and more preferably for the total weight of the machine 10 to be between 400 and 450 kg. Minimising the weight of the machine 10 also enables the machine 10 to be towed by a wide range of vehicles such as common automobiles.
  • the width of the machine 10 at its widest point in this example from an outer edge of one tyre 15 to an outer edge of the other tyre 15, to be less than 1.5 metres, at least when the machine 10 is in a condition for towing.
  • a power source 32 is provided towards the second end of the lower frame 12.
  • the power source 32 is an internal combustion engine, which may be provided with an electric starting system.
  • a pull-start or other manual start system may be provided.
  • the power source 32 need not be an internal combustion engine, but could equally be an electrical cell, or any other suitable power source.
  • An upper frame 34 is mounted towards a first end, on the lower frame 12 on a pivot joint (not shown) such as a rotatable motor, for rotational movement about a substantially upright axis.
  • the upper frame 34 carries an operator's seat 36, in front of which is a mounting 41 for a working arm 40.
  • a hydraulic motor (not shown), which may be part of the pivot joint, is provided to effect rotation of the upper frame 34 between a transport position (shown in Figure 2), in which the mounting 41 for the working arm 40 faces towards the second end of the lower frame 12, and a working position (shown in Figure 1 ), in which the mounting 41 for the working arm 40 faces generally away from the second end of the lower frame 12 of the machine 10.
  • a mechanical working arm lock is provided towards the second end of the lower frame 12 to hold the working arm 40 stationary when the upper frame 34 is in the transport position.
  • a pivot joint lock such as a retractable pin, may be provided to prevent rotation of the upper frame 34 when it is in the transport position. In this way, undesired movement of the working arm 40 and/or the upper frame 34 can be prevented, when the upper frame 34 is in the transport position.
  • the mounting 41 for the working arm 40 includes a king post or similar structure, and a hydraulic actuator e.g. a ram, (not shown) is provided to pivot the working arm 40 about a generally upright axis A.
  • the working arm 40 in this embodiment is able to pivot through at least 180 degrees, and this, in combination with the rotary mounting of the upper frame 34 enables the machine 10 be used for a wide variety of excavating operations, even where obstacles are present.
  • the working arm 40 can be used to dig a trench adjacent the machine 10.
  • the small overall size of the machine 10 enables the machine 10 to access areas which a larger excavating machine might not be able to reach.
  • the machine 10 could be used in a garden which can only be accessed by a narrow path or gate.
  • the working arm 40 has a first arm part 42, or boom, a first end 43 of which is mounted on the mounting 41 , for pivotal movement about a first generally horizontal axis B, relative to the upper frame 34. Pivotal movement of the first arm part 42 about the first generally horizontal axis B is effected by a hydraulic actuator, such as a hydraulic ram 47, in a generally conventional manner.
  • a hydraulic actuator such as a hydraulic ram 47
  • a second arm part 44 is pivotally attached to a second end 45 of the first arm part 42 remote from the first end 43 of the first arm part 42, for pivotal movement relative to the first arm part 42 about a second generally horizontal axis C.
  • a further hydraulic ram 46 is pivotally mounted on the first arm part 42, and has a piston 48 which is pivotally attached at a first end 50 of a second arm part 44 or dipper, the second hydraulic ram 46 being actuable by a supply of pressurised hydraulic fluid to cause pivotal movement of the second arm part 44 relative to the first arm part 42, about the second generally horizontal axis C.
  • An excavating tool 52 or other working implement is mounted on a second end
  • the excavating tool 52 is a bucket.
  • the excavating tool 52 is interchangeable and thus any other tool, for example a drilling tool, could be used.
  • One end of another hydraulic ram 56 is pivotally mounted towards the first end 50 of the second arm part 44, with a piston 58 of the hydraulic ram 56 being pivotally attached to part of the excavating tool 52.
  • the hydraulic ram 56 is again actuable by a supply of pressurised hydraulic fluid to cause pivotal movement of the excavating tool 52 relative to the second arm part 44, about the third generally horizontal axis D.
  • the engine or other power source 32 powers a fluid pump (not shown) which supplies pressurised hydraulic fluid to the hydraulic motors to drive the wheels 14.
  • the fluid pump also supplies pressurised hydraulic fluid to a valve block V provided on the upper frame part 34 having a plurality of control valves which can be actuated to supply pressurised fluid to the hydraulic motor to effect rotation of the upper frame 34, and to actuate the various hydraulic rams 46, 47, 56, motors and drive motors.
  • the pivot joint on which the upper frame 34 is mounted provides a conduit for pressurised hydraulic fluid to the valve block V.
  • the pressurised hydraulic fluid passes upwardly through the pivot joint.
  • Multi-directional control joysticks 62, 64 are provided to control the operation of the machine 10, with one joystick, for example the right-hand joystick 62, being operable to drive the machine 10, and the other joystick, for example the left- hand joystick 64, being operable to control the working arm 40.
  • the joysticks 62, 64 are mounted on arms 66 of the operator's seat 36, to reduce the overall width of the machine 10, but they could be positioned in any other convenient location.
  • foot controls may be provided to control the operation of the machine 10.
  • the multi-directional joysticks 62, 64 may actuate the control valves in a variety of ways.
  • the multi-directional joysticks 62, 64 may be mechanically linked, for example by levers, to the control valves of the valve block V, with movement of the multi-directional joysticks 62, 64 in one or other direction causing one or more of the control valves to be actuated, thus causing movement of the machine 10 and/or movement of one or more of the first and second arm parts 42, 44 of the working arm 40 and the excavating tool 52.
  • control valves may be electric servo valves, and the multidirectional joysticks 62, 64 may be operable to actuate electrical components such as micro switches, which in turn control a supply of electrical current to electrically-operated control valves, thus to control the operation of the machine 10 and the working arm 40.
  • control valves may be hydraulic servo valves, with the multidirectional joysticks supplying a small amount of pressurised hydraulic fluid to the servo valves to actuate the servo valves, thus controlling the operation of the machine 10 and the working arm 40.
  • an operator occupies the operator's seat 36 of the machine 10 and can drive the machine 10 using one of the multi-directional joysticks 62, 64, in this example the right-hand joystick 62, whilst the other joystick, in this example the left-hand joystick 64, can be used to control movement of the upper frame 32, the first and second arm parts 42, 44 and the excavating tool 52 of the working arm 40.
  • forward or backward movement of the joystick 62 causes forward or backward movement of the machine 10, as pressurised hydraulic fluid is supplied to the hydraulic motors to drive the driveable wheels 14, by actuating the relevant control valves, causing both of the hydraulic motors, and thus both of the driveable wheels 14, to turn in the same direction.
  • the non- driveable wheel 22 is free to rotate, it rotates in the same direction as the driveable wheels 14 as the machine 10 moves forwards or backwards.
  • Steering of the machine 10 is accomplished in the example, by pushing the joystick 62 to the right or to the left, depending upon a desired turning direction. Movement of the joystick 62 causes actuation of one or more control valves to steer the machine 10 in the desired direction.
  • the driveable wheels 14 are steerable, with hydraulic actuators being provided, for example, to change the orientation of the driveable wheels 14 according to the desired turning direction.
  • the machine may use a skid-steer system.
  • the control valves supply pressurised hydraulic fluid to the hydraulic motor in the right-hand driveable wheel 14, causing the right-hand driveable wheel 14 to rotate in a forward direction, whilst the left-hand driveable wheel 14 is held stationary.
  • the joystick 62 is pushed to the left, the left-hand driveable wheel 14 is caused to rotate in a forward direction, whilst the right-hand driveable wheel 14 is held stationary.
  • the movement of one of the driveable wheels 14 causes the machine 10 turn.
  • the non-driveable wheel assembly 16 is forced to rotate about a generally upright axis, allowing the non-driveable wheel 22 to turn as the machine 10 turns.
  • the machine 10 could in another example be steered by a steering wheel, or foot operated pedal controls or otherwise as required.
  • the working arm 40 can be operated using the left-hand joystick 64, which actuates the control valves to supply pressurised hydraulic fluid to the hydraulic actuator controlling pivoting of the working arm 40 and the various hydraulic rams 47, 46, 56 controlling movement of the first and second arm parts 42, 44 and the excavating tool 52.
  • the left-hand joystick 64 may control the operation of control valves which supply pressurised hydraulic fluid to the hydraulic motor provided to effect rotation of the upper frame 34, or alternatively the right-hand joystick may be operable, in a second mode, to control rotation of the upper frame 34.
  • the right or left-hand joystick 62, 64 may be operable in different modes to effect movement of different parts of the working arm 40.
  • the left-hand joystick 64 may be operable to pivot the working arm 40 about the generally vertical axis A and to pivot the first arm part 42 about the first generally horizontal axis B, with a second mode being provided in which the second arm part 44 and the excavating tool 52 can be moved.
  • the power source 32 acts as a counterweight, to prevent the machine from tipping as the working arm is used.
  • the weight of the power source 32 alone may be insufficient to provide a desired counterweight.
  • retractable stabiliser legs may be provided towards the first end of the lower frame 12.
  • the stabiliser legs may be manually deployable, or may include hydraulic actuators to effect deployment and retraction, and can be deployed so as to extend outwardly of the first end of the lower frame 12 and to engage the ground, thus reducing the risk of the machine 10 tipping when the working arm 40 is in use.
  • a lowerable dozer blade (not shown) may be provided, extending outwardly of the first end of the lower frame 12.
  • the dozer blade can be lowerable into engagement with the ground in front of the driveable wheels 14, thus reducing the likelihood of the machine tipping by providing a fulcrum, outwardly of and below the first end of the lower frame 12.
  • the dozer blade extends outwardly of the first end of the lower frame 12
  • the dozer blade permits the machine 10 to be used for levelling operations.
  • the stabiliser legs and the dozer blade are retracted/raised and the machine 10 is driven or otherwise moved to a position in which the socket 28 of the towing structure 26 is close to a tow ball of a towing vehicle.
  • the socket 28 of the towing structure 26 is then manually lifted into position on the tow ball, with the upper frame 34 in the working position such that the working arm 40 weighs down the first end of the lower frame 12, thus reducing the effort required to lift the towing structure 26.
  • the upper frame 34 is then rotated to the transport position, either manually or under the action of the hydraulic motor with the power source 32 being used to provide power to supply pressurised hydraulic fluid to the hydraulic motor.
  • the working arm lock and/or the pivot joint lock where provided, can be engaged, to prevent undesired movement of the working arm 40 and/or the upper frame 34 during transport of the machine, and the non-driveable wheel assembly 16 can be raised by rotation of the handle 24.
  • the motors for the driveable wheels 14 may be electric motors.
  • the hydraulic motor which is provided to effect rotation of the upper frame 34 may be replaced by an electric motor, where the power source is an electric cell.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

La présente invention concerne une excavatrice (10) comprenant un châssis inférieur (12) monté sur une paire de roues motrices (14) à une première extrémité du châssis (12) et sur un ensemble à roue non motrice (16) à l'autre extrémité dudit châssis (12). Le châssis constitue à cette autre extrémité une structure (26) par laquelle l'excavatrice (10) peut être remorquée. Le châssis (12) porte également une source motrice (32) pour entraîner les roues (14) et une pompe à fluide entraînée par la source motrice (32). L'excavatrice (10) comporte en outre un châssis supérieur (34) équipé d'un siège d'opérateur (36). Le châssis supérieur (34), qui tourne sur le châssis inférieur (12), dispose en un point en face du siège (36) un bras d'engin (40) constitué d'une première partie (42) pivotant autour d'un premier axe horizontal (B) et d'une deuxième partie (44) pivotant autour d'un deuxième axe horizontal (C) et portant l'outil d'engin (52). Pour le remorquage de l'excavatrice, l'ensemble à roue non motrice (16) est relevé, sans contact avec le sol.
PCT/GB2008/000378 2007-02-02 2008-02-04 Excavatrice WO2008093131A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0702024.1 2007-02-02
GB0702024A GB2446137A (en) 2007-02-02 2007-02-02 Small, self-powered, towable excavator

Publications (1)

Publication Number Publication Date
WO2008093131A1 true WO2008093131A1 (fr) 2008-08-07

Family

ID=37891192

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2008/000378 WO2008093131A1 (fr) 2007-02-02 2008-02-04 Excavatrice

Country Status (2)

Country Link
GB (1) GB2446137A (fr)
WO (1) WO2008093131A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351221A (en) * 1963-01-09 1967-11-07 Richard Smalley Engineering Lt Excavating and/or loading device
DE2434556A1 (de) * 1974-07-18 1976-03-04 Krone Bernhard Gmbh Maschf Geraetetraeger
EP0074832A2 (fr) * 1981-09-15 1983-03-23 Benford Limited Excavatrice
DE3416326A1 (de) * 1984-05-03 1985-11-28 Holger 2000 Hamburg Grude Anhaenger fuer fahrantrieb
DE29503586U1 (de) * 1995-03-03 1995-05-18 Brungs Hans Walter Fahrbarer Kran
US5490755A (en) * 1994-07-06 1996-02-13 Billotte; Keith W. Self-propelled loader carrier
US20080000652A1 (en) * 2006-05-17 2008-01-03 Johnson William C Towable backhoe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351221A (en) * 1963-01-09 1967-11-07 Richard Smalley Engineering Lt Excavating and/or loading device
DE2434556A1 (de) * 1974-07-18 1976-03-04 Krone Bernhard Gmbh Maschf Geraetetraeger
EP0074832A2 (fr) * 1981-09-15 1983-03-23 Benford Limited Excavatrice
DE3416326A1 (de) * 1984-05-03 1985-11-28 Holger 2000 Hamburg Grude Anhaenger fuer fahrantrieb
US5490755A (en) * 1994-07-06 1996-02-13 Billotte; Keith W. Self-propelled loader carrier
DE29503586U1 (de) * 1995-03-03 1995-05-18 Brungs Hans Walter Fahrbarer Kran
US20080000652A1 (en) * 2006-05-17 2008-01-03 Johnson William C Towable backhoe

Also Published As

Publication number Publication date
GB0702024D0 (en) 2007-03-14
GB2446137A (en) 2008-08-06

Similar Documents

Publication Publication Date Title
US20180058035A1 (en) Mobile Device
US9856698B2 (en) Self-propelled, towable coring apparatus
US6688836B2 (en) Self-propelled dolly with power lift
US20070240928A1 (en) Compact construction vehicle with improved mobility
US20140271078A1 (en) Lift arm structure with an articulated knee portion
JP3357643B2 (ja) 地面を破壊するための機械
US6715579B1 (en) Articulated frame work vehicle
EP1560987B1 (fr) Excavateur-chargeur
US20230041236A1 (en) Utility vehicle with omnidirectional wheels
US20080314854A1 (en) Working Machine
KR101970486B1 (ko) 농업용 스키드 스티어 로더
US20030095857A1 (en) Personal loader
JP6770013B2 (ja) クランプアームを備えた解体機械
WO2008093131A1 (fr) Excavatrice
US20230077263A1 (en) Traction control for steering articulated power machine
WO2022055856A1 (fr) Chargeur utilitaire compact à levage et extension synchronisés de fixation d'outil de travail
WO1993018235A1 (fr) Ameliorations apportees aux appareils de travaux routiers
CN113498387B (zh) 用于使铰接式动力机器转向的牵引控件
US11414001B1 (en) Motorized vehicles for transporting material, and methods relating thereto
US10392773B2 (en) Linkage assembly for machine
JP2799767B2 (ja) 掘削積込ロボット
CA2905691A1 (fr) Appareil de carottage remorquable, auto propulse

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08702040

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08702040

Country of ref document: EP

Kind code of ref document: A1