WO1993003950A1 - Vehicule de travail a un seul essieu - Google Patents

Vehicule de travail a un seul essieu Download PDF

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Publication number
WO1993003950A1
WO1993003950A1 PCT/FI1991/000252 FI9100252W WO9303950A1 WO 1993003950 A1 WO1993003950 A1 WO 1993003950A1 FI 9100252 W FI9100252 W FI 9100252W WO 9303950 A1 WO9303950 A1 WO 9303950A1
Authority
WO
WIPO (PCT)
Prior art keywords
work vehicle
wheels
arms
axle
power source
Prior art date
Application number
PCT/FI1991/000252
Other languages
English (en)
Inventor
Matti MÖNKÄRE
Original Assignee
Groveswing Oy
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 Groveswing Oy filed Critical Groveswing Oy
Priority to PCT/FI1991/000252 priority Critical patent/WO1993003950A1/fr
Publication of WO1993003950A1 publication Critical patent/WO1993003950A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D51/00—Motor vehicles characterised by the driver not being seated
    • B62D51/007—Motor vehicles characterised by the driver not being seated the vehicle being of the endless track type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D51/00—Motor vehicles characterised by the driver not being seated
    • B62D51/04—Motor vehicles characterised by the driver not being seated the driver walking
    • B62D51/06—Uniaxle walk-type tractors

Definitions

  • the invention relates to a single-axle work vehicle, more specifically to a single-axle tractor-type work vehicle presented in the ingress part of claim 1.
  • axle means the line between the centres of the wheels and not a solid shaft.
  • Single-axle then means a light work vehicle driven by one pair of drive wheels where the total weight of the work vehicle rests on this axle, and the extremes according to this definition are, on one hand, a single-axle tractor to the rear of which a supporting pair of non-driven wheels together with the driver's seat on the top can be connected, and on the other hand, a garden rotary cultivator whose frame is kept in horizontal position by supporting it on two shafts which extend rearwards from the body.
  • the object of this invention is to remove the above mentioned drawbacks and present a versatile vehicle which can be used in various cultivation and transpor ⁇ tation applications especially in farming but also in other purposes like e.g. in road maintenance etc.
  • the work vehicle accor ⁇ ding to the invention is mainly characterized in what is presented in the characterizing part of claim 1. Accordingly, the drive wheels of the work vehicle are suspended from arms which are arranged to pivot in a vertical plane parallel to the drive direction of the work vehicle on a supporting point in the vehicle body. Then the arms can be locked at different posi ⁇ tions. Accordingly, this enables one to adjust both the vehicle height from the ground and the position of the axle in the longitudinal direction of the work vehicle. Furthermore, through the use of a hydraulic power transmission from the vehicle power source to the wheels, use of inconvenient mechanical power transmission systems can be avoided, which otherwise would impose restrictions to the possible wheel mo ⁇ tions.
  • Vehicle adaptabi ⁇ lity can be further increased by arranging the suppor ⁇ ting points of said arms to such a part that can be moved relative to the vehicle body in the longitudinal direction thereof by means of a longitudinal actuator, such as e.g. a transfer screw attached to the body.
  • a longitudinal actuator such as e.g. a transfer screw attached to the body.
  • the work vehicle can be optionally provi ⁇ ded with auxiliary wheels detachably mounted on the body thereof for attaching a track passing through the drive wheels and said auxiliary wheels.
  • Power transmission between the power source and the power take-off point of the work vehicle is advanta ⁇ geously hydraulic, which then leads to a simple struc- ture.
  • the power source of the work vehicle can be mounted on the support by a base that is elas ⁇ tic relative to the vehicle body, whereby motor vibra ⁇ tions are not transmitted to other parts of the structure to such an extent as before, but the power transmission to the drive wheels and to the power take-off point, however, brings about no difficulties, because the transmission is hydraulic.
  • figure 1 shows the body of the work vehicle accor ⁇ ding to the invention as a side view
  • figure 2 shows the same as a front view
  • figure 3 shows the arm of the vehicle body as a perspective view
  • figure 4 illustrates the movement of the axles of the drive wheels in the longitudinal di ⁇ rection of the vehicle
  • figure 5 illustrates the changing of the height of the body from the ground and the changing of the gauge between the wheels as a front view.
  • figure 6 shows a roller assembly connectable to the vehicle as a perspective view
  • figure 7 shows the work vehicle provided with the roller assembly of figure 6 as a side view
  • figure 8 shows a second embodiment of the work vehicle as a side view
  • figure 9 shows a partly sectioned front view of the work vehicle of figure 8
  • figure 10 shows as a side view the attachment of the tracks with the auxiliary equipment to the vehicle of figures 8 and 9
  • figure 11 shows the power source of the work vehi ⁇ cle and schematically the associated hyd ⁇ raulic system.
  • a work vehicle has a body 1 having a power source 2, such as a combustion engi ⁇ ne. Mounted on the body 1, there is provided a pair of drive wheels 3 between which the axle of the work vehicle is formed, at which axle the weight of the work vehicle is transferred to the ground.
  • the axle is represented by a dashed line A in figure 2.
  • Wheels 3 are suspended from arms 4, which are arranged to pivot on a supporting point 5 in the vehicle body so that the centre point of the wheels 3 can be moved in a vertical plane parallel to the longitudinal direction of the work vehicle. Then, the centres of the drive wheels 3, which are situated at axle A, move along an arcuate trajectory in said vertical plane and then the distance of axle A from the vehicle body 1 can be changed by turning the arms 4, whereby the height of the work vehicle from the ground changes.
  • the arms 3 are mounted, by their ends which lie clo ⁇ sest to the work vehicle, on supporting points 5 on the sides of the vehicle body 1.
  • the supporting points 5 are formed of articulations enabling the turning of the arms 4.
  • On the side of the body said articulation 5 is in turn attached to a part 6 which is attached on the side of the body and comprises an arcuate locking surface 7.
  • the arm is in turn provided with a locking member 8 which can be locked to the locking surface 7. Locking is accomplished so that the locking member 8 is movable towards the articulation 5 and away there ⁇ from in a radial direction perpendicular to the arc of the locking surface 7 with said articulation forming the centre of curvature of the arc.
  • the confronting surfaces of the locking member 8 and the corresponding locking curve 7 are provided with teeth, and the turning of the arm 4 is prevented when the teeth of the locking member and the teeth 7a of the locking curve are interengaged.
  • the locking member 8 and the locking surface 7 are so arranged that the locking member 8 and the confronting locking surface 7 are situated at the opposite end of the arm 4 relative to the point of attachment of the wheel 3.
  • the locking surface 7 is formed on an arcuate edge, facing away from the arti- culation 5, of the part 6, and the locking member 8 is in connection with the end of the arm 4 through a lengthwise slit 9 in the locking surface 7.
  • the lock ⁇ ing member 8 can be pressed against the teeth of the locking surface 7 e.g. by screwing a nut 10. Natural- ly, there are other alternatives for locking the arm 4 to different positions, but the foregoing method is simple and secure. Another potential locking method will be described later in connection with the embodi ⁇ ment shown in figures 8-10.
  • the arm 4 can be locked in several different positions because the locking arc 7 has a lengthwise toothing continuing in the same configuration.
  • the locking arc shown in the figures is 90° in length, whereby the arm 4 can turn 90° from a position, in which its projecti ⁇ on is horizontal in the vertical plane parallel to the longitudinal direction of the work vehicle, to a position, in which said projection is vertical, which then gives the maximum variation in the height of axle A and consequently the maximum variation in the ground clearance of the vehicle.
  • the arm 4 can then be locked in said horizontal position, vertical position and practically in a stepless manner in any of the inter ⁇ mediate positions between these two extreme positions.
  • the length of the locking arc 7 is 180°, and then the arm 4 could turn 180° below the horizontal plane going through the articulation 5, whereby one would obtain also a maxi ⁇ mum transfer of axle A in the longitudinal direction of the work vehicle.
  • Figure 2 shows best the position of the arms 4 as a side view.
  • Arms 4 are arranged to extend obliquely sideways from the articulation 5 onwards, whereby they extend sideways and make an angle of e.g. 15-45° with the vertical section of the arm between the articula- tion 5 and the part 8.
  • the ends, situated by the wheels, of the arms 4 are farther away from each other than the articulations 5, and the gauge between the wheels is greater, which is of help especially in farming applications.
  • This structure is also illustra- ted in figure 5.
  • the gauge between the wheels can be adjusted by chan ⁇ ging the attachment of the wheel to the arm 4 e.g. by reversing the wheel or replacing the wheels with wheels of different dimensions.
  • FIG. 3 shows the hydraulic hoses 11 which for the most part between the body 1 and the arm end go inside the arm 4. Power transmissi ⁇ on over the articulation 5 between the turning arm 4 and the body 1 takes place hydraulically without any mechanical transmission means, wherefore turning movement presents no disturbance to the power trans ⁇ mission.
  • the arm ends can be provided with hydraulic motors, which are known in prior art, for rotating the wheels 3 which can be normal disc wheels mounted with bolts on the disc centre of the hydraulic motor.
  • the arm has a larger dimension in the direction of its conical trajectory than in the direction that is perpendicular to this trajectory.
  • the arm has an enclo ⁇ sed structure so that the hydraulic hoses 11 can be easily mounted inside.
  • Transferability of axle A in the longitudinal directi- on of the work vehicle can be further increased by disposing the part 6 together with the articulation 5 in a part that is movable in the longitudinal directi ⁇ on of the body 1.
  • this part is desig ⁇ nated by the reference number 12 and it is formed of a mounting plate 12 which has a cross-section of a broad U and surrounds the underside of the body, and whose upright parts lean against the upright sides of the lower part of the body. Said parts 6 are attached to these upright parts on both sides of the plate 12.
  • Both arms 4 can be simultaneously transferred in the longitudinal direction of the work vehicle by trans ⁇ ferring the plate 12 and, therefore, the location of axle A in the longitudinal direction of the work vehicle is not dependent on the fixed location of the supporting point 5, but this supporting point 5 can also be transferred. Transferring of axle A in the longitudinal direction of the work vehicle makes the work vehicle either front-heavy or rear-heavy, and e.g. if the work vehicle is used as a vehicle which is supported by shafts 13 extending rearwards from the body, the load that is transmitted through this shaft can be easily decreased.
  • Figure 4 illustrates this possibility to move the contact point of the wheels 3 with the ground in a stepless manner and, at the same time, the location of the centre of mass of the vehi ⁇ cle with respect to this contact point (contact points B and C) .
  • trans ⁇ ferring of axle A in the longitudinal direction of the work vehicle is not dependent on the turning of the arms 4, but while changing the location of axle A its height from the body can be maintained the same, which would not be possible if the supporting point 5 were kept fixed relative to the body.
  • Plate 12 can be attached to the body 1 using suitable fixation means, e.g using bolts inserted in holes arranged in the longitudinal direction of the body.
  • the invention additionally enables the use of tracks in the work vehicle.
  • Figures 6 and 7 show this alter ⁇ native where a separate roller assembly 14 can be attached under the body 1 having two pairs of wheels 16 for supporting the work vehicle, through which wheels an endless track 17 or the like endless loop passes which, by its underside, makes contact with the ground.
  • the upper side of the roller assembly thereby comprises plates 15 attached to the sides on the lower part of the body 1.
  • the mounting plate 12 along with the arms 4 is transferred to the front of the body, the plates 15 of the roller assembly are at ⁇ tached to the body behind it, and the arms 4 are directed from the supporting points 5 forwards, where ⁇ by axle A of the drive wheels 3 is situated in front of the wheels 16 of the roller assembly and above the plane defined by their axles.
  • the endless track 17 is led via the drive wheels 3 and the wheels 16 of the roller assembly in a manner shown in figure 7, whereby the wheel 3 serves as the drive wheel for the track 17 and as the first wheel of the track loop, by which wheel the direction of motion of the track is changed, and the track touches the ground within the section between the wheels 16 of the roller assembly.
  • Figure 6 further shows the oblique supports, i.e. the connecti ⁇ on rods 18 of the roller assembly 14 which in their operating position are directed obliquely upwards and forwards for supporting the arms 4 by their other ends.
  • the length of the oblique supports is adjustable so that, by means of them, the track 17 can be simul ⁇ taneously tightened to a suitable tension and, in a corresponding way, the tracks can be made loose by decreasing the length before the detachment of the tracks.
  • a particularly important feature of the invention is the power transmission to the drive wheels and to implements which are connected to the power take-off point of the work vehicle or which can be placed thereto. Both power transmissions take place hydrauli- cally by means of a hydraulic pump connected to the power source 2.
  • the hydraulic scheme of the work vehicle is schematically presented in figure 11, and other components which are not shown in the figure but which are known in prior art and which are commonly used in hydraulic control systems can be utilized in the scheme.
  • the power transmission to the drive wheels 3 takes place by means of a variable-displacement pump 20, which is connected to the combustion engine 2 serving as the power source, out of which pump the hydraulic lines 21 lead in a closed circuit via control valves 22 to the hydraulic motors 23 which rotate the wheels.
  • a work hydraulic pump 24 is connec- ted to the same shaft of the combustion engine as the variable-displacement pump 20, and from this work hydraulic pump 24 a hydraulic line 25 leads to the power take-off point, the return line therefrom being designated by reference number 26.
  • Power take-off point in this context means a point to which an imple ⁇ ment is connected which either belongs integrally thereto or which can be changed thereto, the implement needing an external power source, such a rotary culti ⁇ vator or the like.
  • the power take-off point, to which the implement is connected can be rotating as is conventionally the case.
  • the power take-off point can, however, be arran ⁇ ged to be hydraulic, whereby it comprises the ends of the hydraulic lines, with which the hydraulic lines required by the implement can be joined e.g. using quick-acting fittings.
  • rotating axles which present occupational safety risks in the power take ⁇ off point can be avoided.
  • the hydraulic medium can be led e.g. to a trailer which is connected to the rear of the work vehicle, whereby the wheels of the trailer can be arranged to serve as pusher wheels.
  • FIG. 4 shows one application of the power transmis ⁇ sion described above.
  • a rotary hoe 36 is attached to the rear of the work vehicle by an arm 37 which is pivoted to turn in the horizontal plane.
  • the arm is rotatably mounted on the body 1 of the work vehicle by means of a vertical pivot 38.
  • the power transmission takes place hydraulically over the pivot 38 along the arm 37 to the hydraulic motor which rotates the rotary hoe.
  • the power transmission does not disturb the rotation of the arm and the rotary hoe can more easily follow the path of the wheels e.g. in bends.
  • the engine 2, the variable-displacement pump 20 and the work hydraulic pump 24 form an integral block disposed in the body 1 so that the engine 2 is situ ⁇ ated first in the main direction of motion of the work vehicle, followed by the variable-displacement pump and the work hydraulic pump, in this order.
  • Said block is mounted on a base which is elastic with respect to the body, e.g. on a rubber cushion 32 (figure 2) , whereby vibrations of the device can be significantly reduced.
  • Hydraulic system of the work vehicle enables stepless and independent velocity control of both the drive wheels and the rotating power take-off point of the work vehicle, flexible changing of the driving direc ⁇ tion, and hydraulic braking of the drive wheels. Furthermore, all control activities which are needed for the motion can be performed by one hand due to the fact that the steering shaft 13 is connected to the flow control valve 22, to the stem of which the move ⁇ ment of the steering shaft will be transmitted. Also other control devices can be provided on the steering shaft.
  • Figures 8-10 show a second example of a work vehicle according to the invention, where the objectives of the invention has been taken into account to such an extent as possible, i.e. the versatility of applica ⁇ tions, the undisturbed operation and the simple struc ⁇ ture.
  • Figures 8 and 9 show the work vehicle without the track, i.e. the wheel version seen from the side and partly cross-sectioned seen from the front.
  • the arms 4 are arranged to be locked to the part 6 so that the part 6 is in this case a plate which is situated below the supporting point 5 and which is provided on its side with holes 7a disposed successi ⁇ vely in an arc with its centre at the supporting point 5, at which holes a hole 8 in the arm 4 between axle A and the supporting point 5 can be locked e.g. by means of a locking pin.
  • the arm 4 can be turned by means of a screw 34 at ⁇ tached to the part 6 above the supporting point 5.
  • the screw is in mesh with a toothed gear 35 which is joined fixedly to the arm 4 and whose pitch corres- ponds to that of the screw.
  • the screw 34 is directed parallelly with the gear 35.
  • the toothed gear in turn is joined fixedly to the arm 4 and is situated con ⁇ centrically to the articulation of the supporting point 5.
  • Figure 9 additionally shows how the part 12 can be moved lengthwise relative to the body of the work vehicle.
  • the part 12 is a part which is attached to the sides and to the underside of the vehicle carrier beams and in which from the plate that is against the underside of the carrier beams there protrudes a part 29 between the lengthwise carrier beams la and lb being situated on both edges thereof.
  • This part is provided with a bore having a threaded inside and there is a transfer screw 27 having a similarly threaded outside passed through this bore, which screw is rotatably attached to the vehicle body so that it cannot move in the longitu ⁇ dinal direction.
  • Part 12 can be moved in the longitu- dinal direction of the work vehicle by rotating the transfer screw either manually or using other power sources. From the edges of the plate-like part there extend upwards upright parts which abut on the exte ⁇ rior sides of the carrier beams la and lb and thus guide the part 12 which surrounds the carrier beams from below and from the sides.
  • Figure 9 additionally shows that normal disc wheels can be used as wheels 3 and the wheels are attached to the hydraulic motors 23 by bolts. Since the mounting disc 3a of the wheel is situated at a distance from the symmetry plane D of the wheel that is mounted on the actual rim, the gauge between the wheels can be changed by reversing the wheel by 180°.
  • the figures additionally show how the engine 2 serving as the power source for the vehicle, is in this case mounted on elastic members, which serve as vibration absorbers, in this case on rubber pieces 32 which are attached to the vehicle body on top of the carrier beams la and lb.
  • the work hydraulic pump 24 and the variable-displacement pump 20 are connected to the engine 2 by means of an an axle which is provided with a flexible pin-type coup ⁇ ling 33 (figure 8) whereby the hydraulic part can be disposed rigidly to the vehicle body. This will not increase vibration since the combustion engine is the main source of vibration.
  • the figures additionally show that the hydraulic oil tank 28 forms the vehicle body 1 to which the combus- tion engine is attached in the above described way.
  • the hydraulic oil tank 28 is arranged inside the hollow carrier beams la and lb of the vehicle body.
  • the oil tank can be situated inside the beam assembly of the body comprising the whole circumference thereof or only within a part of its length inside the beams. This arrangement brings about advantages in that it saves space and it simultaneously offers a possibility to cool the hydraulic medium by means of heat transfer straight through the walls of the beams to the at- mosphere.
  • the tank 28 extends around inside the beam carriers, by the side edges of the body inside the beam carriers la and lb, and by the front and rear edges inside beam carriers lc and lb.
  • one of the carrier beams can be provided with a partition wall and the above points are placed on opposite sides of this partition wall.
  • Figure 10 shows a track alternative of the embodiment shown in figures 8 and 9. This utilizes only one pair of auxiliary wheels, whereby the auxiliary wheels 16 are placed to the ends of legs 14a of a fork-like part 14 which is attachable to the rear of the body.
  • the transverse middle part 14b of the part can be attached by means of an attachment means 31 provided therein to a tow hook or the like coupling means 30 which is arranged to the rear of body 1 for towable implements.
  • the part 14 comprises, attached to the rear of the said middle part 14 b thereof, a similar tow hook or the like coupling means 30* for a towable implement.
  • Figure 10 shows also a connecting rod 18 which further increases the stiffness of the structure, i.e. the part 14 can be connected with the arm 4 comprising the drive wheels 3.
  • the connecting rod 18 is adjustable in length for the same purpose as the oblique supports shown in figures 6 and 7.
  • arm 4 is turned obliquely forwards when the tracks are attached, but as shown in figure 10, the drive wheel 3 at the end of the arm 4 is also a wheel that is against the ground.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Abstract

Un véhicule pour travaux à un seul essieu, équipé d'une source motrice, comprend une paire de roues menantes adjacentes (3) qui sont reliées à la source motrice (2) du véhicule, et entre lesquelles l'essieu (A) du véhicule est agencé. Les roues sont suspendues à partir de bras (4) qui sont disposés de façon à pivoter dans un plan vertical, parallèle au sens longitudinal du véhicule, sur un point de support (5) compris dans le corps du véhicule (1), de sorte que la hauteur du corps du véhicule à partir de l'essieu est modifiée. Les bras sont agencés de façon à pouvoir être verrouillés en différentes positions. La transmission de puissance, de la source motrice du véhicule vers les roues (3) est hydraulique. Les points de support (5) des bras sont montés sur une partie (12) mobile par rapport au corps du véhicule (1) et dans le sens longitudinal de celui-ci.
PCT/FI1991/000252 1991-08-14 1991-08-14 Vehicule de travail a un seul essieu WO1993003950A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI1991/000252 WO1993003950A1 (fr) 1991-08-14 1991-08-14 Vehicule de travail a un seul essieu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI1991/000252 WO1993003950A1 (fr) 1991-08-14 1991-08-14 Vehicule de travail a un seul essieu

Publications (1)

Publication Number Publication Date
WO1993003950A1 true WO1993003950A1 (fr) 1993-03-04

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Family Applications (1)

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PCT/FI1991/000252 WO1993003950A1 (fr) 1991-08-14 1991-08-14 Vehicule de travail a un seul essieu

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WO (1) WO1993003950A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006444A1 (fr) * 1998-07-29 2000-02-10 Cris Adrian Nicolae Cultivateur n'etant pas conduit par une personne et utilisant deux systemes alternes de mouvement
EP1574119A1 (fr) * 2004-03-09 2005-09-14 Müllers & Backhaus GmbH & Co. KG Procédé et appareil guidé à main pour le travail du sol
ITGE20090076A1 (it) * 2009-10-09 2011-04-10 Emanuela Elisa Cepolina Veicolo per lo sminamento

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB352393A (en) * 1930-04-01 1931-07-01 Horace Mote Improvements in or connected with the frames of motor tractors, agricultural implements, and the like
DE904501C (de) * 1949-09-01 1954-02-18 Iarapidia Motormaeher A G Handgefuehrter Einachs-Traktor
FR1071122A (fr) * 1952-10-02 1954-08-25 Perfectionnements aux tracteurs pour l'agriculture
FR2545436A1 (fr) * 1983-05-02 1984-11-09 Bach Emile Motoculteur a roues et outils rotatifs de travail permanents et reglables
EP0314032A2 (fr) * 1987-10-24 1989-05-03 Gebr. Holder GmbH & Co. Véhicule de travail uniaxe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB352393A (en) * 1930-04-01 1931-07-01 Horace Mote Improvements in or connected with the frames of motor tractors, agricultural implements, and the like
DE904501C (de) * 1949-09-01 1954-02-18 Iarapidia Motormaeher A G Handgefuehrter Einachs-Traktor
FR1071122A (fr) * 1952-10-02 1954-08-25 Perfectionnements aux tracteurs pour l'agriculture
FR2545436A1 (fr) * 1983-05-02 1984-11-09 Bach Emile Motoculteur a roues et outils rotatifs de travail permanents et reglables
EP0314032A2 (fr) * 1987-10-24 1989-05-03 Gebr. Holder GmbH & Co. Véhicule de travail uniaxe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006444A1 (fr) * 1998-07-29 2000-02-10 Cris Adrian Nicolae Cultivateur n'etant pas conduit par une personne et utilisant deux systemes alternes de mouvement
EP1574119A1 (fr) * 2004-03-09 2005-09-14 Müllers & Backhaus GmbH & Co. KG Procédé et appareil guidé à main pour le travail du sol
ITGE20090076A1 (it) * 2009-10-09 2011-04-10 Emanuela Elisa Cepolina Veicolo per lo sminamento

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