• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Drill downhill comprising: - a housing (53); a plurality of tubes (52) inserted in the housing and each opening through an upper opening (54s) and, inside the housing, through a lower opening (54i), the housing having a plurality of dispensing openings ( 61), each dispensing opening being in communication with at least one lower opening (61), so that a compound emerging from the lower opening can exit the housing through the dispensing opening.
    公开号:FR3070234A1
    申请号:FR1760445
    申请日:2017-11-07
    公开日:2019-03-01
    发明作者:Tom Dumoulin
    申请人:Carbure Tech；
    IPC主号:
    专利说明:

    SEEDER DESCENT
    Technical area
    The present invention relates to a seed drill intended to be fixed on a prop of an agricultural machine. Such a seeder is intended to open the earth so as to create a slit, then to arrange a compound, and in particular a seed in said slit. The invention also relates to a device for opening and lowering a seed drill, in particular for such a seed drill.
    Prior art
    Ploughshare seeders turn the soil upside down and stuff when there is too much plant debris.
    Alternatively, an opener seed drill is known. Such a seed drill comprises an opening disc which cuts the earth and thus creates a slot, and a seed drill lowering arranged above the opening disc and by means of which a seed is deposited in the slot. However, tests have shown that the results are not satisfactory.
    Furthermore, current seeders do not allow seeds of different sizes to be sown at varying depths. In addition, when seeds of different sizes are simultaneously placed in the same tank, they tend to sediment.
    Current seeders also do not allow the distribution of incompatible compounds between them, such as seeds and anti-slug granules.
    Current seed drills also require substantial tillage before using the seed drill, and in particular decompaction, stubble cultivation and plowing. This preparatory work has a high cost and a negative impact on the environment.
    There is a need for a new seed drill which can at least partially solve the above problems.
    Summary of the invention
    According to a first main embodiment, the invention proposes a seed drill comprising a support intended to be towed by an agricultural machine and supporting:
    - an opening disc, rotatably mounted on the support,
    - seed drill descent,
    - a coulter, interposed between the opening disc and the seed drill lowering,
    - a closing wheel, the seed drill being interposed between the coulter and the closing wheel, the coulter and the seed drill extending in the plane of the opening disc.
    As will be seen in more detail in the following description, the opening disc is intended, in a service position in which the seed drill is pulled on a substantially horizontal soil, to cut the earth so as to provide a narrow slot in the ground, the coulter is intended to widen said narrow slot, so as to provide an enlarged slot, the seed drill lowering is intended for injecting compounds, in particular seeds, into the enlarged slot, and the closing wheel is intended to close the widened slot.
    The inventor has found that such a drill makes it possible to obtain surprising results, without any work of preparing the soil. In particular, the coulter prevents the slot from closing before the seeds are deposited.
    A seed drill according to the invention may also include one or more of the following optional characteristics:
    the seed drill includes a depth limiter fixed on the opening disc and defining a maximum driving depth;
    soil preparation tools are attached to the depth limiter;
    the seed drill lowering comprises a tube which opens through at least one lower opening at an altitude lower than said maximum digging depth;
    the tube changes orientation and / or branches in its lower part;
    the seed drill comprises several said tubes emerging through respective lower openings, at different altitudes;
    the seed drill comprises, associated with an opening disc, a seed drill lowering;
    a coulter; and a single closing wheel extending in the plane of the opening disc or two closing wheels extending substantially symmetrically with respect to the plane of the opening disc;
    the seed drill has a deflection fin configured to pull the seed drill down when the seed drill is pulled while the opener disc is driven into the ground;
    the seed drill comprises means for adjusting the position, preferably at least in the horizontal direction and / or in the vertical direction, of the coulter and / or of the seed drill lowering and / or of the opening disc, relative to the support;
    the distance between the seed drill lowering and the coulter is less than 10 cm;
    the peripheral edge of the opening disc is crenellated or smooth.
    The invention also relates to a seeding method according to which a seed drill according to the invention is towed into said service position, by feeding the seed drill down with a compound to be distributed, for example seeds or a plant protection product.
    According to a second main embodiment, the invention proposes an opening device for a seed drill, in particular intended for a seed drill according to the invention, the opening device comprising:
    - an X-axis opening disc;
    a depth limiter fixed on the opening disc and comprising a stop defining, in a service position, a maximum driving depth of the opening disc in the ground, a device in which the depth limiter comprises gripping means configured for, in said service position, pinch plants against the ground, at a localized pinch point, in the direction of travel, in front of the X axis.
    Preferably, the pinching means comprise a tool extending radially outwards beyond the stop, and / or the stop is configured so as to be partially driven into the ground when the opening disc is in said position. service.
    As will be seen in more detail in the following description, when the opening disc is used to make a slot in a ground comprising plants on its surface, and in particular straw, the stop comes to limit the sinking of the opening disc in the ground.
    When the opening disc is at said maximum driving depth, the tool extending radially outward comes to rest on the ground in front of the axis of the opening disc. He thus pinches the plants against the ground. Thus retained, the plants cannot therefore be pushed by the opening disc to the bottom of the slot.
    An equivalent effect, but generally of lesser amplitude, is obtained when the stopper is configured to penetrate slightly into the ground in the position of maximum insertion of the opening disc. Pinching in front of the X axis is then ensured by the stop itself.
    The inventor has found that this result improves the agricultural yield. Without being bound by this theory, the inventor explains this result of the fact that the plants not being pushed to the bottom of the slot, they therefore do not form a mattress which isolates from the ground the seeds deposited, as according to the prior art. The germination of these seeds is advantageously facilitated.
    An opening device according to the invention may also include one or more of the following optional characteristics:
    the belt has an elastically variable radius between a minimum radius defining the maximum insertion depth and a maximum radius, greater than the minimum radius, the elasticity of the belt allowing it to present the minimum radius in line with the X axis of the disc opener, i.e. in a vertical transverse plane, including the X axis of the opener disc, and the maximum radius in front of the X axis of the opener disc, i.e. upstream of the axis X when the opening device is pulled;
    the tool extending radially outwards, beyond the stop, projects radially more than 1 cm, more than 3 cm, more than 5 cm, and / or less than 20 cm, preferably less than 10 cm, beyond the stop;
    the stop is configured so as to be driven into the ground, when the opening disc is at said maximum driving depth, over more than 3 cm, more than 5 cm, and / or less than 10 cm, preferably less than 8 cm;
    the stop consists of at least one belt coaxial with the opening disc;
    the belt is shaped to sink partially into the ground and / or carries at least one said tool adapted to sink at least partially into the ground, when the opening disc rotates at said maximum driving depth;
    the belt is continuous and closed on itself;
    the depth limiter has first and second said belts, of the same outside diameter, which extend over first and second lateral faces of the opening disc, respectively;
    the first and second belts are fixed to the periphery of respective first and second plates, of the same external diameter, which extend over the first and second lateral faces of the opening disc, respectively;
    the opening disc is clamped between the first and second plates by means of bolts, the screws of which pass successively through the first plate, the opening disk and the second plate.
    The invention also relates to a method of opening a floor by means of an opening device according to the invention, method according to which said device is pulled into a service position in which the stop is in abutment on the ground so as to define the maximum insertion depth of the opening disc into the ground, the pinching means pinching plants against the ground, at a localized pinch point, in the direction of advance, in front of the axis X.
    Preferably, the pinching means comprise a tool extending radially outward beyond the stop and, during said pulling, the tool is partially or completely sunk into the ground at each turn of the opening disc, or even permanently, over a depth greater than 0.5 cm, 1 cm, 2 cm, 3 cm and / or less than 20 cm, 15 cm, 10 cm, 8 cm, 5 cm.
    In one embodiment, the stop is permanently driven into the ground to a depth greater than 0.5 cm, 1 cm, 2 cm, 3 cm and / or less than 20 cm, 15 cm, 10 cm, 8 cm, 5 cm.
    According to a third main embodiment, the invention proposes a seed drill lowering, in particular intended to be fixed on the support of a seed drill according to the invention, the seed drill lowering comprising:
    a housing ;
    a plurality of tubes inserted into the housing and each opening, preferably outside the housing, through an upper opening and inside the housing through a lower opening, the housing comprising a plurality of dispensing openings, each opening dispenser being in communication with at least one, preferably a respective single lower opening, so that a compound exiting the lower opening can exit the housing through the dispensing opening.
    As will be seen in more detail in the following description, a seed drill lowering according to the invention makes it possible to simultaneously distribute different compounds at varying depths and positions, relative to the plane of the opening disc. In particular, a seed drill descent according to the invention makes it possible to simultaneously distribute products which are incompatible with each other, for example seeds and anti-seed granules.
    Furthermore, it makes it possible to distribute pure compounds, that is to say from reservoirs in which they are not mixed with other compounds. It thus avoids the sedimentation which occurs when compounds of different natures and / or particle sizes are mixed before being distributed. The quality of the distribution is therefore the same throughout the sowing operation.
    A seed drill according to the invention may also include one or more of the following optional characteristics:
    the housing has at least two dispensing openings opening onto different faces of the housing, for example on a right side face and on a left side face, or on a side face and on a bottom face, or on a side face and on a rear face;
    the housing has at least two dispensing openings opening at different altitudes;
    the housing has at least two dispensing openings opening, in the service position, into different vertical longitudinal planes, the direction of the length being the direction of movement of the seed drill down in the service position;
    the housing is provided with a shield projecting more than 1 cm from one face of the housing in which a distribution opening is formed and arranged so as to protect said distribution opening from the earth inlets in the service position, c 'That is to say, when the seed drill descent is towed, the distribution opening opening into a slot in the ground;
    the shield has the shape of a shaped deflector for, in the service position, keeping the seed drill lowered partially sunk into the ground;
    at least two of said tubes have different equivalent internal diameters and / or cross sections of different shapes, the cross section of a tube being perpendicular to the axis of the tube;
    the housing comprises sheaths, each sheath being configured to receive a respective tube and prevent transverse displacement of said tube, that is to say in a direction in a plane perpendicular to the axis of the tube;
    the housing comprises at least one distribution opening opening onto a rear face of said housing and / or at least one distribution opening opening onto a bottom face of said housing and / or at least one distribution opening opening onto a lateral face of said housing;
    the housing is made up of several removable parts.
    The invention also relates to a kit comprising:
    - a seed drill lowering according to the invention, the housing being formed by assembling several removable parts, and
    - one or more substitute parts substitutable for at least one of said removable parts and having an arrangement of distribution openings different from at least one of said removable parts.
    Brief description of the figures
    Other characteristics and advantages of the invention will become apparent on reading the detailed description which follows and on examining the drawing in which:
    the figure represents, seen from the side, a seed drill according to the invention;
    Figure lb shows, seen from above, the slot produced by the drill of Figure la;
    Figures 2 and 8 show, seen from the side and in perspective respectively, a drill according to other embodiments of the invention;
    Figures 3a and 3b show, in axial section and seen from the side respectively, an opening device according to an embodiment of the invention;
    Figures 4a and 4b show, in axial section and seen from the side respectively, an opening device according to another embodiment of the invention;
    Figure 5 shows a seed drill lowering according to the invention;
    Figures 6a and 6b show, seen from the side and in perspective respectively, a variant of seed drill descent according to the invention;
    FIG. 7 shows another variant of seed drill descent according to the invention, the tubes not being shown.
    In the various figures, identical or analogous members are designated by identical references.
    Definitions
    In the present description, the adjectives "lower", "upper", "horizontal", vertical, "upstream", "downstream", "front", "behind", "front", "rear", "right", " left ”and“ lateral ”are defined with respect to a service position in which the device in question (the seed drill or the opening device or the seed drill lowering) is towed, on a horizontal ground S, in a direction of advancement F, for sowing or opening the earth, as shown in Figure la or Figures 3 and 4. The arrow F indicates the direction of the direction of advance in which the device is towed. It therefore points to "the front". Upstream and downstream, front and back are relative to the vertical axial plane, that is to say the plane containing the X axis and which, in the service position, is vertical.
    The arrow referenced "V" is vertical and points upwards. It defines the vertical direction in which the "altitudes" A are measured, relative to the support.
    An axial plane is a plane including the X axis, unless otherwise indicated.
    We call "vertical longitudinal plane" a plane extending parallel to the plane of the opening disc.
    The equivalent diameter of a section or opening is the diameter of a disc having the same area as said section or opening.
    It should be interpreted including or including or presenting in a non-restrictive manner, unless otherwise indicated.
    detailed description
    seeder
    As shown in FIG. La, a seed drill 10 according to the invention comprises a support 12 on which are successively mounted, from front to rear, an opening disc 14, a coulter 16, a seed drill lowering 18 and a wheel closing 20.
    Preferably, the support 12 also carries a deflector 22, in this case interposed between the opening disc 14 and the coulter 16.
    The opening disc and / or the coulter and / or the seed drill lowering and / or the deflector may in particular be made of high elastic limit steel, or "HLE", or stainless steel. These parts can be locally reinforced with tungsten carbide and / or abrasion-resistant welding.
    Support
    Preferably, the support 12 comprises an opener disc support 26 and a prop 28.
    The opener disc support 26 is mounted on the prop 28. More precisely, it is immobilized on the prop 28 by tightening between an upper flange 30 and a lower flange 32, by means of screws 34. The loosening of the screws 34 allows advantageously to modify the distance between the prop and the opening disc, and therefore to modify the distance between the opening disc 14 and the deflector 22, the coulter 16, the seed drill lowering 18 and the closing wheel 20.
    Preferably, at least in the part on which the opening disc support 26 can slide when the screws 34 are loosened, the prop 12 has a constant cross section, preferably substantially rectangular, the width of the prop preferably being greater. at 10 mm, preferably greater than 20 mm, and / or less than 50 mm, preferably less than 40 mm. The length of the cross section of the prop is preferably greater than 30 mm, greater than 50 mm, greater than 70 mm, and / or less than 200 mm, less than 150 mm, less than 150 mm, less than 100 mm .
    A scraper support 24 is preferably fixed on the opener disc support 26.
    The prop 28 conventionally comprises means of attachment, not shown, to an agricultural machine, conventionally a tractor. It has the general shape of a "comma" and comprises a first branch 291, substantially horizontal in the service position, and a second branch 292, substantially vertical, which branches out into three arms 311, 3H and 313 serving as supports for the deflector 22, to the assembly constituted by the coulter 16 and the seed drill lowering 18, and to the closing wheel 20, respectively.
    Opener disc
    The opening disc 14, of substantially horizontal axis X, is intended to form a narrow slot in the ground.
    H is mounted to rotate, preferably freely, on the support and preferably extends in a substantially vertical plane, which facilitates its penetration into the ground.
    In a preferred embodiment, the seed drill has as many opening discs as it spares slots. In other words, for a coulter, the seed drill has only one opening disc. Thus, each slot is only opened with a single opening disc 14. The penetration of the opening disc in the ground is improved.
    The opening disc 14 preferably has a diameter greater than 10 cm, greater than 20 cm, greater than 30 cm, greater than 40 cm, greater than 50 cm, greater than 60 cm, or even greater than 100 cm, greater than 150 cm, and / or less than 250 cm, a diameter of 70 cm being preferred.
    The thickness of the opening disc 14, measured 10 mm from its peripheral edge 40, is preferably less than 20 mm, preferably less than 15 mm, preferably less than 10 mm, preferably less than 8 mm, or even less than 5 mm, even less than 3 mm, even less than 2 mm, and / or more than 1 mm. More preferably, the peripheral edge 40 of the opening disc 14 is tapered.
    In one embodiment, the thickness of the opening disc is substantially constant along any radius. In one embodiment, this thickness increases as the X axis approaches, in order to limit the deformability of the opening disc. The maximum thickness is, however, preferably less than 20 mm, preferably less than 10 mm.
    The peripheral edge 40 of the opening disc 14 may be circular. In one embodiment, it comprises a plurality of slots 42, preferably equiangularly distributed around the axis X. More preferably, two successive slots 42 are separated by a distance d42 greater than 10 mm, preferably greater at 30 mm, preferably greater than 50 mm and / or less than 300 mm, preferably less than 200 mm.
    The slots 42 are preferably substantially circular and preferably have a depth greater than 5 mm, preferably greater than 10 mm, more preferably greater than 20 mm and / or less than 50 mm.
    The slots 42 advantageously allow a particularly efficient shearing of the earth.
    In a preferred embodiment, the opening disc is provided with a depth limiter, mechanically preventing the opening of the opening disc beyond a maximum insertion depth Pmax.
    In this position of maximum insertion into the ground, the depth limiter defines a "maximum insertion altitude", which is the altitude of the ground S. The parts of the support which are above this altitude are therefore above ground level. The parts of the support which are below this altitude are below ground level. If the altitude “0” is that of the lower end 43 of the opening disc, the maximum insertion altitude A max is therefore equal to the maximum insertion depth.
    The maximum insertion depth Pmax is preferably greater than 3 cm, preferably greater than 5 cm, preferably greater than 7 cm, preferably greater than 10 cm, preferably greater than 13 cm and / or less than 30 cm, preferably less than 25 cm, preferably less than 20 cm, preferably less than 17 cm, a maximum insertion depth of 15 cm being well suited.
    The depth limiter preferably comprises a stop protruding from a side face of the opening disc 14. Preferably, such stops are provided on each of the two lateral faces of the opening disc 14, preferably symmetrically with respect to the plane of the disc opener.
    In a preferred embodiment, the stop has the shape of a belt 44, substantially cylindrical with an axis X.
    In a preferred embodiment, the stop carries at least one tool 48 suitable for pinching the plants and / or working the soil. The shape of the tools 48 is not limiting. In particular, these tools can have the form of plates preferably extending substantially radially (tools 48i), or substantially perpendicular to the axis X (tools 482) or comprising two plates forming a V and for example fixed, by the point V, on the radially outer face of a belt described below (tools 483). These tools could also be angles or T-profiles or inverted T or U or inverted U or rectangle or square.
    Preferably, a tool extends, at least partially, radially outward from the stop. In other words, the radius R44 of the stop or "minimum radius of the depth limiter" is less than the radius R48 of the tool 48, the radii R44 and R48 being the distances between the axis X and the most radially outer part of the stop 44 and the tool 48, respectively. The difference between these two radii is preferably more than 1 cm, more than 3 cm, more than 5 cm, and / or less than 20 cm, preferably less than 10 cm.
    For example, the stop may be a belt 44 and carry a ring preferably extending substantially in a transverse plane, that is to say parallel to the plane of the opening disc, radially outside the belt (FIG. 3 ).
    The opening disc, the belt and the ring thus define a radially open U-shaped profile.
    Advantageously, the tool can thus pinch the plants, and in particular the straw, further upstream, that is to say rest on the ground at a point P v 'in front of the axis of the opening disc. The plants thus penetrate less deeply into the slot.
    In one embodiment, the tools have the form of studs projecting from the radially outer surface of the belt. The belt can in particular be covered externally with a structured tread, for example like a tractor tire, the studs corresponding to the reliefs which define the structure of such a tire. A crampon can be a bead of material, oriented parallel to the X axis.
    A tool, and in particular a crampon, can form, with an axial plane passing through its center, an angle greater than 10 °, preferably greater than 30 °, and / or less than 90 °, preferably less than 70 °, of preferably less than 60 °.
    In one embodiment, the belt is externally covered with a plurality of beads forming bands which extend in different directions, preferably by forming chevrons. The studs may in particular be made of rubber.
    Preferably, the tools 48 are shaped to sink into the ground S to a depth P48 of more than 1 cm, more than 3 cm, more than 5 cm, and / or less than 20 cm, preferably less than 10 cm. The greater the depth P48, the more the plants on the ground will be pinched at a point P v 'upstream of the vertical axial plane Ρχ, and the less they will sink into the slot.
    In one embodiment, the belt can be covered with a deformable strip, for example with a strip of foam which, in the vertical axial plane Ρχ, that is to say in line with the axis X of the disc opener, is compressed, which gives a minimum radius to the depth limiter, and which upstream of the X axis, is relaxed, which makes it possible to obtain a maximum radius, and therefore to pinch the plants upstream of the axis X. The foam strip is a particular example of tool 48.
    In general, the depth limiter preferably has a minimum radius determining the maximum insertion depth and defined by the stop, and a maximum radius, greater than the minimum radius, determining the pinch point Pv 'and defined by the tool 48.
    Pinching the plants upstream of the X axis can also be achieved by the stopper itself, and in particular by the belt, insofar as it is driven into the ground in the service position. The depth P44 of this depression (FIG. 4) is preferably more than 1 cm, more than 3 cm, more than 5 cm, and / or less than 10 cm, preferably less than 8 cm. The contact surface of the stop with the ground, in particular the width of the belt, can be adapted for this purpose. The greater the depth P44, the more the plants on the ground will be pinched at a point P v upstream of the vertical axial plane Ρχ, and the less they will sink into the slot.
    Of course, the embodiments described above (Figures 3 and 4) can be combined.
    In one embodiment, the stop is welded to the opening disc.
    The stop can take different forms. It can, for example, take the form of a plurality of rods or plates extending along a virtual cylinder of axis X.
    The width of a stop, and in particular of the belt 44, measured along the axis X, is preferably greater than 1 cm, preferably greater than 2 cm, preferably greater than 3 cm, preferably greater than 4 cm and / or preferably less than 50 cm, preferably less than 30 cm, preferably less than 20 cm, preferably less than 10 cm, preferably less than 8 cm.
    A belt and / or the tools advantageously make it possible to immobilize the plants against the ground during the passage of the opening disc, and thus prevent them from being pushed by the opening disc to the bottom of the slot.
    The shape of the belt can be arbitrary, provided that it extends over a cylinder of axis X. The belt can be full or hollow, of constant or variable width, or even be locally interrupted. Preferably, it is continuous, that is to say in one piece, and closed on itself.
    In one embodiment, the depth limiter consists of several, for example four pieces of coaxial belt each extending over an angular sector of less than 85 °, or less than 70 °.
    In a preferred embodiment, the stop is a belt 44 which is fixed on a plate, itself fixed on the opening disc.
    In a preferred embodiment, reinforcing ribs 49 are provided in order to stiffen the stop. In particular, the two edges of a square defining a right angle can be respectively welded on the radially inner face of the belt 44 and on the face of the opening disc 14 or of the plate on which the belt 44 is itself fixed.
    Preferably, the plate is discoidal and fixed at its periphery, preferably welded, to the belt. Advantageously, the life of the plate is increased.
    In a preferred embodiment, the depth limiter has first and second belts 44, of the same outside diameter, which extend over the first and second lateral faces of the opening disc 14, respectively.
    When the opening disc 14 is in service, the plants, and in particular the straw, are thus pinched between the soil and the two belts 44. This pinching immobilizes them and thus allows the opening disc to put them in tension, then to cut them. .
    Not only are the plants therefore not pushed to the bottom of the slot made by the opening disc, but also they are cut. The introduction of plants at the bottom of the slot is therefore further reduced. This embodiment is particularly advantageous when compounds have to be introduced into the slot at different heights.
    Preferably, the first and second belts are fixed, preferably welded or screwed to the periphery of the first and second plates.
    More preferably, the opening disc is clamped between the first and second plates by means of bolts, the screws of which pass successively through the first plate, the opening disk and the second plate. More preferably, these bolts are arranged near the first and second belts, preferably within 10 cm, preferably within 5 cm of the first and second belts. The attachment of the belts to the opening disc is advantageously simple and quick. In addition, the opening disc 14, which constitutes a wearing part, can be easily replaced.
    In the preferred embodiment, the seed drill comprises means for adjusting the position of the opening disc relative to the support 12, preferably at least in the vertical direction.
    coulter
    The objective of the coulter 16 is to widen the slot created by the opening disc 14, the coulter 16 has a maximum thickness greater than that of the part of the opening disc 14 penetrating into the ground, that is to say s' extending radially beyond the depth limiter.
    The coulter preferably comprises a mast 17 provided with means for fixing to the support arm 3h.
    The maximum thickness of the coulter 16, measured parallel to the X axis, is preferably greater than 10 mm, preferably greater than 15 mm, or even more than 20 mm and / or less than 40 mm, preferably less than 30 mm. Such a maximum thickness promotes the deposition of seeds and protects the seed drill from abrasion.
    In the preferred embodiment, the seed drill comprises means for adjusting the position of the coulter 16, relative to the support 12, in the vertical direction, that is to say means for adjusting the altitude of the coulter, and / or means for adjusting the inclination of the coulter 16 relative to a vertical plane. Preferably, the amplitude between the highest altitude and the lowest altitude of the coulter is greater than 100 mm, preferably 150 mm, preferably greater than 200 mm.
    The coulter altitude is preferably determined so that its depth Pi6 of penetration into the ground in the service position is less than the depth P m ax of penetration of the opening disc. The difference between P m ax and Pi6 is preferably less than 5 cm, preferably less than 3 cm, preferably less than 1 cm. Advantageously, the coulter thus widens the slot made by the opening disc substantially over its entire height.
    In one embodiment, the seed drill further comprises means for adjusting the position of the coulter 16, relative to its support arm 312, in the direction of advance F. The amplitude between the extreme positions along this direction is preferably greater than 100 mm, preferably greater than 150 mm, more preferably greater than 200 mm.
    All known adjustment means are envisaged.
    The coulter 16 preferably includes protective front plates 50, made of an abrasion-resistant material, for example tungsten carbide. These plates define the leading edge of the coulter, through which the coulter enters the slot provided by the opening disc 14. The leading edge is preferably tapered forward, in order to promote penetration of the coulter.
    The leading edge of the coulter 16 extends in the general plane of the opening disc 14, so that the coulter penetrates substantially into the vertical median plane of the slot created by the opening disc 14.
    Planter lowering
    The seed drill lowering comprises one or more tubes 52, of identical or different internal diameters. In the embodiment of Figure 1, the first tube 521 is for example intended for the deposition of fertilizer or an anti-slug product. The second tube 522 is intended for depositing seeds.
    The number of tubes 52 is preferably less than 15, preferably less than 10, preferably less than 6, or even less than 5, and / or preferably more than 1, preferably more than 2, preferably more than 3.
    The equivalent internal diameter of a tube 52 is adapted to the compounds to be deposited. Preferably, it is greater than 5 mm, preferably greater than 8 mm, or even greater than 10 mm and / or less than 70 mm, preferably less than 50 mm, preferably less than 40 mm, preferably less than 30 mm , preferably less than 25 mm.
    The section of a tube 52 can be any, for example round (FIG. 7), oval or polygonal (FIGS. 5 and 6a / 6b). In one embodiment, it is substantially rectangular, for example 15 mm x 20 mm or, in particular for dispensing an anti-slug product, preferably 15 mm x 15 mm.
    In one embodiment, a tube 52, preferably each tube 52, can be disassembled. Advantageously, the seed drill lowering is thus modular and can be adapted to different particle sizes of compounds to be distributed.
    Preferably, a tube 52, preferably each tube 52, extends in a plane parallel to the plane of the opening disc, preferably in the plane of the opening disc.
    More preferably, the tubes 52 extend substantially parallel to each other. The compactness of the seed drill is improved.
    More preferably, the tubes 52 extend substantially parallel to the general direction of the coulter, preferably extend substantially vertically in the service position. The compactness of the seed drill is improved.
    Each tube, preferably made of stainless steel, opens out through an upper opening 54 s and through a lower opening 54i. The opening 54 s is intended to be placed in communication with a source of the compound to be deposited, for example a reservoir of seeds or of phytosanitary product (not shown), which may in particular be integral with the traction unit or the support 12 .
    The opening 54i is intended to be placed in the slot widened by the coulter 16. Its altitude Ais is then lower than the maximum insertion altitude A ma ·., ·
    Preferably, the seed drill comprises means for adjusting the position of the seed drill descent, relative to the support 12, in the vertical direction, that is to say means for adjusting the altitude of the seed drill descent , and / or in a horizontal plane. Preferably, these adjustment means allow, in the service position, partial penetration of the seed drill down into the enlarged slot. In a preferred embodiment, the seed drill lowering comprises several tubes 52, the depths P52 of which can be modified independently of one another.
    More preferably, the depth of penetration into the ground, P52, of a tube 52, preferably of any tube 52, is always less than the depth of the slot (Pmax). Preferably, the penetration depth P52 of a tube 52, preferably of any tube 52, is less than the depth Pi6 of the coulter. More preferably, the difference between Pi6 and P52 is greater than 5 mm, preferably greater than 1 cm, or even greater than 2 cm. Advantageously, the bottom of the slot widened by the coulter remains at a distance from the lower opening 54i of the tube, and does not substantially interact with the compound to be dispensed and still present in the tube 52. The distribution of this compound is thereby facilitated .
    Preferably, in a service position in which the opening disc is inserted at the maximum insertion depth in a horizontal soil, a tube, preferably each tube opens by at least one opening less than a depth greater than 5 cm.
    All known adjustment means can be used to modify the altitude of the seed drill lowering 18 and / or, preferably, of one or more tubes 52.
    In a preferred embodiment (FIG. 5), the seed drill lowering 18 comprises a housing 53.
    The shape of the housing is not limiting (Figures 5, 6 or 7).
    Preferably, the housing is delimited by a side wall 59, preferably vertical, and a bottom 55, preferably horizontal, and defining, on the side opposite the bottom 55, a housing opening 56 intended to receive several tubes 52, preferably more than 2, more than 3, more than 4, more than 6, more than 8, more than 10, or even more than 12 tubes 52.
    The lateral wall 59 defines, externally, a right lateral face 59d, a left lateral face 59 g , a front, or “front” face 59f and a rear face 59 a . The bottom 55 externally defines a bottom face.
    The term "outer surfaces" the right side faces 59d, 59g left side, front 59f, rear 59 a and bottom.
    The housing 53 can be fixed on the support, preferably reversibly. More preferably, the fixing of the box 53 to the support 12 allows a modification of the altitude of the box 53. For example, the support can have several orifices, at different altitudes, allowing the fixing of the box, for example by means of bolts (Figures 6 and 8). Advantageously, the altitude of all the tubes arranged in the housing can thus be modified simultaneously.
    Preferably, the housing 53 defines several, preferably more than 2, more than 3, more than 4, or even more than 5 housings, or "sleeves" 57. Each sleeve 57 is shaped to receive a respective tube.
    The shape of a sheath is not limiting. It is considered that any configuration of the housing allowing a tube to be fixed in a predetermined position is a "sheath".
    Preferably, the cross section of a sheath is substantially complementary to that of the tube it receives, so that after the tube has been inserted into the sheath, it is substantially immobilized laterally.
    The complementarity of the cross sections of the sleeve and the tube can serve as a keying device. When the tubes have different cross sections, this complementary shape prevents a tube 52 from being inserted by mistake into a sheath which is not intended for it.
    Preferably, the seed drill lowering also comprises means for immobilizing, preferably reversible, the inserted tube, for example one or more needles screwed through the side wall of the housing 53 and coming to bear on the inserted tube. The needles can advantageously replace the tube stops 58 described below.
    The sleeves advantageously allow the seed drill to be used, even when the number of tubes 52 is less than the capacity of the housing 53.
    However, the presence of scabbards is not mandatory. In particular, the tubes may be numerous enough to close the housing opening 56. Each tube is thus held laterally by the adjacent tubes and / or by the side wall 59 of the housing 53. The sleeves are then optional.
    The outer wall of the housing 53, consisting of the side wall 59 and the bottom 55, is pierced by a plurality of distribution openings 61. Each distribution opening 61 is associated with a sheath and a tube 52 so that, when the tube 52 is inserted into the sheath, its lower opening 54i communicates with the distribution opening 61. In other words, a compound, such as a seed, a fertilizer or an anti-slime product, leaving the tube 52 through its lower opening 54i, can come out of the housing 53 through the dispensing opening 61.
    In one embodiment, a single dispensing opening 61 is associated with a sheath.
    In a preferred embodiment, at least two dispensing openings 61 are formed, through the outer wall of the housing, at different heights.
    In a preferred embodiment, the housing comprises at least first and second distribution openings, the first distribution opening opening onto a first external face and the second distribution opening opening onto a second external face, different from the first external face .
    The compounds distributed by the different tubes 52 can thus advantageously leave the seed drill down at heights and / or in different vertical longitudinal planes.
    In a preferred embodiment, no dispensing opening is provided on the front face 59f, poorly protected against the entry of soil when the seed drill is towed.
    More preferably, the most forward distribution opening 61 f opens onto the bottom face of the housing 53. This configuration is particularly advantageous for distributing a fertilizer.
    In a preferred embodiment, the opening of the rearmost distribution 61 opens on the rear face 59. This configuration is particularly advantageous for dispensing slug pellets.
    Finally, preferably, the other dispensing openings open onto the right and left lateral faces. This configuration is particularly well suited for distributing seeds.
    Preferably, the vertical position of a tube 52 inserted in the housing 53 is limited by means of a tube stop 58 fixed, for example welded, on the tube and bearing on the housing 53, for example on the edge of the housing 53 which delimits the opening of the housing 56. Equivalently, a tube stop can be fixed, for example welded, inside the housing so that, in the inserted position of the tube 52, the lower end of the tube rests on the tube stopper.
    In an equivalent embodiment, the tube comes to rest on the bottom 55 and has a lower opening 54i arranged so as to face the associated dispensing opening when the tube is inserted into the housing. Preferably, the tube is then plugged under the lower opening 54i so that the compound to be dispensed cannot descend, into the tube, under the lower opening 54i.
    In one embodiment, the housing 53 is constituted by the assembly of a right part of the housing, defining the right side face 59d, and a left part defining the left side face 59 g of the housing 53. Advantageously, the right part or left part can be changed independently of the other part, which makes it very easy to change the position of the dispensing openings.
    In one embodiment, at least one part of the housing, and preferably at least the right part or the left part, can be removed from the rest of the housing while the housing is kept fixed on the support 12.
    The housing thus has a very high degree of modularity. It can be easily adapted as a function of the various compounds to be distributed, so as to distribute each compound at an optimal altitude and in an optimal vertical longitudinal plane, in particular with regard to the other compounds distributed.
    In a preferred embodiment, the outer wall of the housing carries one or more shields 63 for protecting the distribution openings 61. A shield 63 extends, at least in part, upstream of a distribution opening 61, so diverting the earth from the distribution orifice which, when the seed drill is pulled, could enter it. The shape of the shields 63 is not limiting. In particular, a shield 63 may take the form of a deflection fin 62, described below (Figures 6a and 6b).
    Preferably, a shield 63 is provided to protect each dispensing opening opening onto the right lateral face or the left lateral face, or even for each dispensing opening 61.
    Preferably, a shield 63 projects from the outer wall of the housing by more than 0.5 cm, preferably by more than 1 cm and / or preferably by less than 5 cm, preferably by less than 4 cm, preferably less than 3 cm.
    More preferably, a shield 63 is placed less than 3 cm, preferably less than 2 cm, preferably less than 1 cm from the dispensing opening which it protects.
    The distance between the seed drill descent 18 and the rear edge of the coulter, or "trailing edge", is preferably less than 50 cm, preferably less than 25 cm, preferably less than 10 cm, preferably less than 5 cm . In a preferred embodiment, as shown, the seed drill lowering 18 is in contact with the trailing edge of the coulter. The seed drill can even be mounted on the coulter. The compactness of the seed drill is improved.
    In one embodiment, the maximum “thickness” of the seed drill lowering 18, that is to say its dimension measured parallel to the axis X, is less than the maximum thickness of the coulter 16. In other words, when the seed drill is towed into its service position, the seed drill lowering 18 does not abut frontally on the earth, the latter having been released by the coulter 16.
    The shape of the seed drill lowering 18 is not limiting.
    In particular, in the absence of the housing, the lower opening 54i can open out substantially vertically, as in the embodiment shown in FIG. 1, but also in other directions. In particular, it can open in a direction oriented towards the rear of the seed drill, which limits the risks of obturation.
    In one embodiment, it can also open laterally, for example in a direction parallel to the axis X. Of course, the openings 54i can be oriented differently depending on the tube 52 considered.
    In one embodiment, a tube 52 changes its orientation in its lower part, so as not to deposit in the plane of the disc the compound which it contains. The tube may in particular have the shape of an "L". Advantageously, this embodiment makes it possible not to deposit close to each other the compounds distributed by the different tubes 52.
    In one embodiment, the tube branches at the bottom, for example in the form of an inverted "T". Advantageously, this embodiment makes it possible to distribute a compound along two parallel lines.
    Closing wheel
    The closing wheel 20 is intended to close the enlarged slot in which one or more compounds have been deposited.
    The closing wheel 20 is mounted in rotation, preferably free, on the prop 28, about a Y axis parallel to the X axis. In a preferred embodiment, the closing wheel 20 is mounted on a suspension , not shown, for example comprising a jack, in particular hydraulic or pneumatic, by screw or spring. The suspension is preferably shaped to allow a vertical movement of the closing wheel 20 relative to the prop 28 and for, in the service position, elastically pressing the closing wheel 20 on the ground S. Advantageously, the support of the closing wheel 20 on the ground S is maintained even when the prop 28 is shaken. More preferably, the stiffness of the suspension is adjustable.
    The closing wheel 20 preferably has a diameter greater than 10 cm, preferably greater than 20 cm, preferably greater than 25 cm, or even greater than 25 cm, greater than 50 cm, greater than 75 cm, greater than 90 cm, and / or less than 100 cm.
    The width of the closing wheel 20, measured parallel to the axis X, is preferably greater than 1 cm, preferably greater than 2 cm, preferably greater than 3 cm, more preferably greater than 4 cm, preferably greater 5 cm and / or less than 10 cm, preferably less than 8 cm.
    The running surface 60 of the closing wheel 20 can be smooth or, preferably structured (crenellated in particular). A structuring of the rolling surface 60 limits the risks of slipping and can favor the closing of the slot.
    In one embodiment, the seed drill comprises several closing wheels which follow one another along the direction of advance, which advantageously ensures a good closing of the slot.
    In one embodiment, the seed drill comprises two closing wheels 20, preferably mounted for rotation about a common axis Y, extending on either side of the plane of the opening disc. Preferably, each closing wheel forms, with the plane of the opening disc, an angle greater than 5 °, preferably greater than 10 °, preferably greater than 20 ° and / or preferably less than 40 °. Viewed from the front, the two closing wheels thus define a V, the point of which, cut, is resting on the ground. Preferably, the two closing wheels are shaped so that their contact zones on the ground are spaced from each other by less than 5 cm, preferably less than 3 cm, preferably less than 2 cm. Advantageously, the closing wheels thus exert an effective action to close the slot.
    Deflector
    The deflector 22 is intended to keep the seed drill partially sunk in the ground in the service position.
    The deflector 22 can be rigidly fixed on the support, for example welded to the support.
    In the preferred embodiment, the seed drill comprises means for adjusting the position of the deflector 22 relative to the support 12, preferably at least in the vertical direction and / or in the horizontal direction.
    In particular, the deflector may include oblong slots, or “buttonholes”, 36 crossed by one or more screws 38 screwed into the prop 28 so that their heads compress, and lock in position, the deflector.
    The deflector comprises one or, preferably several deflection fins 62 each preferably extending in a plane substantially parallel to the axis X. Preferably, this plane forms with a horizontal plane, in the service position, a greater angle at 2 °, preferably greater than 5 °, preferably greater than 10 °, preferably greater than 20 °, preferably greater than 30 °, and / or less than 60 °, preferably less than 45 °. As the seed drill advances, the pressure of the soil on the deflection fins 62 thus tends to drive the seed drill into the soil.
    The deflection fins 62 may in particular be made of steel or of another ferrous metal, and preferably comprise, at least in the wear regions, tungsten carbide or abrasion-resistant welding.
    More preferably, at least one deflection fin 62 is fixed to the right of the deflector 22 and at least one deflection fin 62 is fixed to the left of the deflector 22. The right and left deflection fins are preferably symmetrical with respect to the plane of the plane. disc opener, which stabilizes the seed drill when it is pulled.
    Preferably, the seed drill comprises means for adjusting the position of at least one deflection fin 62, and preferably means for adjusting its orientation relative to a horizontal plane, and / or its altitude relative to the support. . Preferably, the amplitude between the extreme low position and the extreme high position is greater than 40 mm, preferably greater than 50 mm, more preferably still greater than 60 mm and / or preferably less than 100 mm.
    Preferably, the right and left deflection fins are adjustable independently of one another, at least in the vertical direction.
    The position of the deflector along the direction of advance is not limiting.
    Scraper
    More preferably, the seed drill 18 comprises a scraper 51, fixed on the scraper support 24, so as to remove the deposits of soil which adhere to the opening disc.
    In the embodiment presented, scrapers are provided above and below the scraper support 24, preferably on each side of the opening disc. In one embodiment, the scrapers rub against the opening disc or are spaced therefrom by a distance of less than 5 mm.
    The scraper 51 can be made of steel. Preferably, in the wear zones, it includes tungsten carbide and / or abrasion-resistant welding.
    Figure 2 shows a variant of the invention. In this variant, the deflector is integrated in the coulter. The deflection fins 62 are thus fixed to the coulter.
    In this embodiment, the deflector 22, the coulter 16 and the seed drill lowering 18 form a compact assembly, fixed on the same arm of the prop.
    The coulter 16 comprises a mast 17, intended to be fixed on an arm of the support, and a sock 65, threaded on the mast. More specifically, the sock has two straight cheeks 661 and 662, connected by a connecting plate 69, substantially vertical. The two cheeks sandwich the mast 17. Screws 70, screwed onto the mast and passing through a vertical buttonhole 71 formed in one of the cheeks, block the sock in position relative to the mast 17.
    The position of the sock is adjustable in the vertical direction and / or, in one embodiment, in the horizontal direction. The vertical buttonhole 71 guides the vertical adjustment. Grooves 64 which are substantially horizontal make it possible to improve the holding in position of the sock after tightening the screws 70.
    Screws 68, screwed into threads formed in the connection plate finally make it possible advantageously to lock the tubes 52 in position by tightening them against the mast 17.
    Operation
    The operation of a seed drill according to the invention results directly from the above description.
    Initially, the parts are assembled together, the seed drill housing and the tubes inserted therein being adapted to the compounds to be dispensed, in particular to determine, as a function of each compound, the altitude and the vertical longitudinal plane of the corresponding distribution opening.
    The prop 18 is attached to a tractor and then pulled onto the field to be sown.
    The opening disc 14 gradually sinks into the ground S, until the depth limiter, in this case the belt 44, limits this sinking. The service position is reached and the deflection fins 62 exert a force tending to maintain this position.
    During its advancement, the opening disc 14 creates a narrow slot 70 (FIG. 1b). The opening disc 14 acts like a pizza cutter and in particular cuts the roots in its path. Advantageously, the earth does not need to be prepared.
    The scrapers 51 detach the earth which would have stuck on the opening disc.
    During the advancement of the opening disc 14 (arrow F), the tools 48 advantageously come to slightly work the soil near the slot, which promotes its subsequent closing.
    In particular in the embodiment shown in FIG. 4, the stop, in this case the belt 44, is pressed to a depth P44 in the ground S. It thus comes to grip, at a point P v upstream of the axis X (upstream and downstream being determined with reference to the direction of advance F, with respect to the axis X), the plants which are on the ground. This pinching opposes the penetration of these plants to the bottom of the slot, which ensures optimal contact between the compounds deposited in the bottom of the slot and the soil.
    Preferably, the opening disc is provided with said first and second belts which pinch the plants well against the ground, slightly in front of (“upstream”) the vertical axial plane Ρχ, on each side of the opening disc. The penetration of plants into the slot is further reduced.
    In the embodiment of Figure 3, the tool 48 extends radially outward, beyond the stop that constitutes the belt. When the opening disc rotates, the tool 48 sinks to a depth P48 into the ground S. It thus pinches, at a point P v upstream of the vertical axial plane Ρχ, the plants which are on the ground.
    The distance A between the pinch point and the vertical axial plane is preferably greater than 5 cm, preferably greater than 10 cm, or even greater than 15 cm, 20 cm, 25 cm or 30 cm.
    The coulter 16 widens the narrow slot 70. The widened slot 72 then receives the compounds 74i injected through the tubes 52i then the distribution openings 61 i, respectively.
    The closing wheel 20 finally comes to roll over the enlarged slot 72 to close it.
    Tests have shown that a seed drill according to the invention is particularly robust and reliable. It does not cause jams and leaves behind a substantially flat surface 76, in which the slot is well closed.
    Furthermore, the tubes of the seed drill descent open into the enlarged slot, which makes it possible to deposit the compounds, and in particular the seeds, with precision at the desired depth.
    The different settings in altitude and / or according to the direction of travel finally confer a wide spectrum of uses. In particular, the seed drill can be used to amend and / or sow different seeds, in very different soils.
    Of course, the invention is not limited to the embodiments described and shown, provided for illustrative purposes only.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. Drill descent comprising:
    - a housing (53);
    - A plurality of tubes (52) inserted into the housing and each opening through an upper opening (54 s ) and, inside the housing, through a lower opening (54i), the housing comprising a plurality of dispensing openings (61), each dispensing opening being in communication with at least one respective lower opening (61), so that a compound leaving the lower opening can exit the housing through the dispensing opening.
    [2" id="c-fr-0002]
    2. seed drill lowering according to the immediately preceding claim, in which the housing has at least two distribution openings opening onto different faces of the housing, for example on a right side face and on a left side face, or on a side face and on a bottom face, or on a side face and on a back face.
    [3" id="c-fr-0003]
    3. Lowering drill according to any one of the preceding claims, wherein the housing has at least two distribution openings opening at different altitudes.
    [4" id="c-fr-0004]
    4. Lowering drill according to any one of the preceding claims, wherein the housing has at least two distribution openings opening, in the service position, in different vertical longitudinal planes, the direction of the length being the direction of movement from lowering the seed drill to the service position.
    [5" id="c-fr-0005]
    5. seed drill descent according to any one of the preceding claims, in which the housing is provided with a shield (63) projecting by more than 1 cm from one face of the housing in which is provided a dispensing opening (61 ) and arranged so as to protect said distribution opening from the soil inlets in the service position, that is to say when the seed drill lowering is towed, the distribution opening opening into a slot in the earth.
    [6" id="c-fr-0006]
    6. Lowering the seed drill according to the immediately preceding claim, wherein the shield has the shape of a deflector shaped to, in the service position, keep the seed drill lowered partially in the ground.
    [7" id="c-fr-0007]
    7. seed drill descent according to any one of the preceding claims, in which at least two of said tubes have different equivalent internal diameters and / or cross sections of different shapes, the cross section of a tube being perpendicular to the axis. of the tube.
    [8" id="c-fr-0008]
    8. Lowering seed drill according to any one of the preceding claims, wherein the housing comprises sleeves, each sleeve being configured to receive a respective tube and prevent transverse displacement of said tube, that is to say in a direction in a plane perpendicular to the axis of the tube.
    [9" id="c-fr-0009]
    9. seed drill descent according to any one of the preceding claims, in which the housing comprises at least one dispensing opening opening onto a rear face of said housing and / or at least one dispensing opening opening onto a bottom face of said housing and / or at least one dispensing opening opening onto a lateral face of said housing.
    [10" id="c-fr-0010]
    10. Lowering seed drill according to any one of the preceding claims, wherein the housing is formed by assembling several removable parts.
    [11" id="c-fr-0011]
    11. Kit comprising:
    - a seed drill lowering according to the immediately preceding claim and
    - one or more substitute parts substitutable for at least one of said removable parts and having an arrangement of distribution openings different from at least one of said removable parts.
    [12" id="c-fr-0012]
    12. Seeder comprising a support (12) intended to be towed by an agricultural machine and supporting:
    - an opening disc (14) being rotatably mounted on the support (12),
    - a seed drill lowering (18) according to any one of claims 1 to 10,
    - a coulter (16) interposed between the opening disc and the seed drill lowering,
    - a closing wheel (20), the seed drill being interposed between the coulter and the closing wheel,
    5 the coulter and the seed drill extending in the plane of the opening disc.
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    同族专利:
    公开号 | 公开日
    EP3479670A1|2019-05-08|
    EP3479670B1|2020-08-12|
    FR3070232A1|2019-03-01|
    FR3070234B1|2020-02-14|
    FR3070232B1|2020-02-21|
    FR3070233B1|2020-02-14|
    FR3070233A1|2019-03-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20030084829A1|2001-11-05|2003-05-08|Lempriere Noel D.|In-line sub-surface seeding, fertilizing and watering system|
    US20170135280A1|2013-05-13|2017-05-18|Clean Seed Ag Ri Cultural Technologies Ltd.|System for variable-ratio blending of multiple agricultural products for delivery via a ported opener|
    WO2017124143A1|2016-01-18|2017-07-27|Blast R & D Pty Ltd|Delivery apparatus|
    US3797418A|1972-02-22|1974-03-19|F Bridger|Minimum tillage planter|
    US6345671B1|2000-06-15|2002-02-12|The United States Of America As Represented By The Secretary Of Agriculture|Flexible ground-driven residue management wheel|
    DE102009004767B4|2009-01-15|2010-11-11|Fritz Güttler|Coulter module for direct sowing and direct sowing machine combination|
    CN104982108B|2015-06-10|2017-04-05|吉林大学|A kind of no-tillage seeding machine band ravels soil mechanism|FR3096226B1|2019-05-24|2021-08-27|Carbure Tech|Seed drill|
    FR3096225B1|2019-05-24|2021-09-03|Carbure Tech|Seed drill|
    FR3108013A1|2020-03-13|2021-09-17|Carbure Technologies SAS|Seed drill|
    FR3113551A1|2020-09-02|2022-03-04|Carbure Technologies SAS|Debris seeder|
    法律状态:
    2019-03-01| PLSC| Publication of the preliminary search report|Effective date: 20190301 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 3 |
    2020-11-26| PLFP| Fee payment|Year of fee payment: 4 |
    2021-10-28| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1758024A|FR3070232B1|2017-08-31|2017-08-31|DRILL|
    FR1758024|2017-08-31|
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