WO2013049951A1 - Herse à hélices d'émottage - Google Patents

Herse à hélices d'émottage Download PDF

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Publication number
WO2013049951A1
WO2013049951A1 PCT/CL2012/000047 CL2012000047W WO2013049951A1 WO 2013049951 A1 WO2013049951 A1 WO 2013049951A1 CL 2012000047 W CL2012000047 W CL 2012000047W WO 2013049951 A1 WO2013049951 A1 WO 2013049951A1
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WO
WIPO (PCT)
Prior art keywords
blades
similar
propeller
octagonal
propellers
Prior art date
Application number
PCT/CL2012/000047
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English (en)
Spanish (es)
Inventor
Daniel MASIHY MUSALEM
Original Assignee
Masihy Musalem Daniel
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 Masihy Musalem Daniel filed Critical Masihy Musalem Daniel
Publication of WO2013049951A1 publication Critical patent/WO2013049951A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B35/00—Other machines for working soil not specially adapted for working soil on which crops are growing
    • A01B35/20—Tools; Details
    • A01B35/28—Rotating tools; Mounting rotating tools
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B21/00—Harrows with rotary non-driven tools
    • A01B21/08—Harrows with rotary non-driven tools with disc-like tools
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B23/00—Elements, tools, or details of harrows
    • A01B23/06—Discs; Scrapers for cleaning discs; Sharpening attachments; Lubrication of bearings

Definitions

  • An agricultural drag-or-pallet harrow of the eccentric type structured from a rigid frame with front hitch for coupling with the tractor or tractor attachment, which has a wheel train adjustable in height for varied cultivation depths, In turn, it allows transport before, during and after tillage. It has two similar and independent bodies, one primary and one secondary, secured to the frame in a distributed and balanced way with respect to its wheel train. Both bodies in particular are made up of respective primary and secondary rotors, which roll freely on the surface of the land during tillage. For this purpose, it has, according to its design, two or more bearings that are mounted on their respective double male-female flanges on one or more axes, existing in each body.
  • each rotor is fixed to a fork, by means of those two or more bearings, with said fork bolted to the frame in a variable angular position, for different agricultural tillage locks.
  • they basically consist of: a plurality of vanes assembled in number of four, of curved triangular design, and spirally arranged with respect to the rotor; as well as it consists of eight large mounting bolts; of multiple propeller separators; and conical washers.
  • the implement also has a metal scraper for each tillage tool composed of four blades or blades, which is adjustable, and is responsible for cleaning them during tillage.
  • vanes are assembled, which in number of four configure multiple vane propellers in each rotor, in which for this purpose, two conical washers and two vanes are inserted on the bolts, making them coincide with the conicity of the flange to make adjustment possible.
  • the washers must be placed one in front of the other, on each bolt of two, and each vane is inserted into three bolts of the six that remain, symmetrically and opposite each other, forming 180 degrees at an angle, in a plane perpendicular to the axis of rotation of the rotor; d) in a similar way, two blades and two washers are interposed, adjacent to those already assembled, but this time they are at 90 degrees angled with respect to the previous ones, thus configuring the first four-blade rotor propeller;
  • An invention or agricultural implement for eccentric trawling or trawling of the type of trawling, for the preparation of agricultural soils which resolves from the crushing of terroirs, the crushing and fluffing of the earth's homogeneous surface layer, whose configuration It presents a simplified design of easy assembly, in order to minimize the maintenance that should be carried out on the implement.
  • a rigid frame with hook for transfer in its frontal section Composed of a rigid frame with hook for transfer in its frontal section, a wheel train adjustable in height for its transport and for varied cultivation depths, two similar bodies, primary or front and secondary or rear, formed by one or more rotors horizontal primary and secondary, respectively, propelled in free rotation by means of two or more bearings mounted in the same number in their respective bearing-bearing spacers, and fixed to their forks, which are attached to a rigid frame under a certain working angle for tillage .
  • each rotor Being constituted by multiple separators, bearing-bearing separators, bearings, washers, self-cleaning scraper system, and a plurality of tillage tools that derive from disks configured from eight or more cuts, which give them the shape of propellers of four or more blades or blades with sharp cutting edges, spirally arranged with respect to the rotor, and assembled to one or more axes that make up each body, where the propellers that are curved to the left are assembled in one or more of the primary rotors, and those curved to the right are assembled in one or more of the secondary rotors, seen from a front view of the harrow.
  • the length of Each rotor is closely related to the desired working width.
  • each or more primary and secondary horizontal rotors which make up the primary and secondary bodies of the harrow, respectively, have a single solid axle of octagonal section or other " section, which assembles a plurality of tillage tools similar to configured propellers of four or more similar blades, and allows the blades of said assembled propellers, to be positioned at 45 degrees contiguously and spirally in their octagonal axis, not confronted with each other which generates "anti-adhesion spaces.” on its surface its optional, concave or conical, or similar pattern, with oblique cut or bevel for parting along the entire length of its perimeter, where each propeller is derived from at least one circular element or concave or conical design stamped disk, or similar, being axially and concentric perforated, octagonally or in another way, for assembly adjustment with respect to its axis, where the axial perforation or ctogonal of the propellers of four or more blades, is coinciden
  • the concave or conical, or similar pattern of the propeller coincides with the concavity or conicity, or similar, of separators, propellers and washers, and makes it possible to adjust it for assembly with each tool of propeller or propeller of four or more blades, which is configured from at least one disk, by eight or more cuts or straight edges and eight or more cuts or edges in semicircular radius, on its concave or conical surface, or similar, viewed from the perspective of a geometric coordinate plane (x, y).
  • the present invention or agricultural harrow is characterized by being modern, fast, high performance, high efficiency, simple mechanics and low maintenance, of exceptional advantages over its similar, resolves technical problems presented by the trowel harrow, and which are Own your design.
  • This functional invention easy to apply, does not require high maintenance after the recording, thanks to the Simplicity of its design that has a single rigid shaft to which tillage tools, separators, bearing-bearing separators, bearings and washers are easily assembled.
  • this implement manages to uniformly banish the seed bed, not generating large terroirs in it, thanks to the characteristics of its particular design and layout of its tools of tillage in each body.
  • This harrow has an ingenious tillage tool, which facilitates the crushing and fluffing of the surface layer of soil, a necessary condition for the seed to remain under an aerated and moist surface, that is, protected from drying out by the effect of solar action. .
  • This state of preparation of agricultural soils is ideal in obtaining a rapid germination of crops, and also affects positively increasing productivity yield.
  • Its tillage tools which resemble propellers of four or more blades, are mainly characterized by: a) bevels of perimeter cut along its entire length, and terminated at an acute end as a ripping tip, which cuts the surface layer into depths of cut that are regulated in their height by the train of wheels of the implement, with its blades stamped with angle of attack, according to requirement of the agricultural work;
  • the curved design of the blades, plus the angle of lock of the bodies are characteristics that make possible the fluff of the seed bed during the tillage.
  • These blades successively lift the earth backwards, dropping it by its own weight, acting as a true shovel, that is, while they roll and move forward penetrating and removing the surface layer, thus allowing the earth to remain under an ideal condition for conservation. of its moisture, and;
  • this new technology not only solves important aspects in the preparation of soils, but also improves agricultural productivity, through generating ideal conditions for rapid germination of crops, that is to say, an unbalanced and fluffy agricultural soil with a good aerated and moist surface layer, well protected from drying out due to solar action, which allows the conservation of the seed and its subsequent development.
  • Dredging of blades of sophisticated technique and rigorous maintenance, of complex assembly of parts and components that make up each rotor, is used in previously plowed agricultural soils and with a specific humidity for each type of soil.
  • this implement When applying this implement on the surface layer mainly in thick or semi-thick soils, such as clayey clay or sand, small pieces of wet terroirs are introduced into the multiple cavities that make up the set of eight separators, which distance the propeller blades or tillage tool that possess both bodies of the harrow. This situation is increasing during the operation of the film, covering practically all the cavities present in the rotors, which makes it imperative at the end of the process, a rigorous cleaning of these.
  • Fig. 1 shows a perspective view of the dredge of concave or conical propellers, or the like, of four or more blades, of the invention
  • Fig. 2 illustrates a partial view, composed of elevation and longitudinal section a-a ', of a secondary body of the invention
  • Fig. 3 corresponds to a perpendicular sectional view of a dredge body
  • Fig. 4 is an exploded and partial perspective view illustrating the assembly of a front propeller rotor, of four or more blades, of the invention
  • Fig. 5 is an elevation view of a propeller of four or more blades, secondary or rear of the invention, describing its design characteristics and manufacturing mode;
  • Figs. 6 and 7 show elevation and side views of a propeller of four or more primary or front blades of the invention
  • Figs. 8 and 9 illustrate elevation and side views of a propeller of four or more secondary or rear blades of the invention
  • Figs. 10 and 11 are perspective views of both types of propellers of four or more blades, corresponding to the primary or front and secondary or rear rotors, respectively;
  • Figs. 12 and 13 correspond to elevation views of a propeller separator of four or more blades, and of a bearing carrier separator, respectively;
  • Fig. 14 is a longitudinal sectional view of the assembly composed of a bearing in its respective bearing-holder spacer, the octagonal shaft, and its respective fork;
  • Fig. 15 illustrates a perspective, partial and cross-sectional view B-B 'of an octagonal axis of assembly of the bodies
  • Figs. 16, 17 and 18 show elevation, side and perspective views of a washer with optional concave or conical print, or the like;
  • Fig. 19 corresponds to a partial elevation view of a fork, which forms a dredge body
  • Fig. 20 illustrates a perspective view of a propeller scraper.
  • the invention consists of an agricultural implement for eccentric rastra 1, of the type of drag.
  • Said harrow is structured of a rigid frame or frame 2, which has a front socket or hitch 3 in its front part, - pivoted in 4, and adjustable in height by mechanical lifting system 5.
  • It has a wheel train 7 that It allows its displacement before, during and after tillage, and that is adjustable in height by means of a hydraulic lifting system 6, which allows various depths of cultivation.
  • the implement or harrow 1 mainly has two bodies: primary 9P and secondary 9S, consisting of one or more primary horizontal rotors 8P and secondary 8S, respectively, propelled in rotation, independent of each other, angled angled to the frame 2, by means of their respective forks 14, which are distributed in an equidistant and balanced way with respect to the wheel train 7.
  • Each rotor 8 is constituted by tillage tools or propellers 10 with concave or conical pattern, or similar, of four or more blades 19, ( see Figs.
  • propellers 10-1 with four or more blades 19 curved to the left are assembled on the primary rotors, and on the secondary 10-D propellers of four or more blades 19 curved to the right, viewed from a front view of the harrow 1.
  • the propellers 10 of c Four or more blades 19 should be placed in elevation and lateral, in a clockwise direction, and with its spindle in working position in front of the observer. They also have, with bearings 16 (see Figs. 2 and 14), with washers 11 with concave or conical pattern, or similar (see Figs.
  • propeller separators 18 of symmetrical design (see Figs. 2 and 12), bearing carrier separators 17 (see Figs. 2 and 13), both concave or conical, or similar, at their ends, scraper-holder bars 13, and propeller scrapers 12 (see Fig. 20) .
  • FIG 2 shows the assembly of the components of one of the bodies 9 of the invention.
  • Each body 9, formed by one or more horizontal rotors 8, can roll freely by means of its bearings 16, which are mounted on the fork 14 (see Figs. 14 and 19), and bolted to the frame 2, so as to be able to move it angularly and transversely with respect to this one, in order to obtain a certain locking for tillage, (see Fig. 1).
  • each primary rotor 8P is similar to the secondary 8S, but with the difference, that in each primary rotor, only 10-1 propellers of four or more blades 19 curved to the left are assembled, and in the secondary, only those 10-D curved to the right, viewed from a front perspective of the implement (see Figs. 1, 6, 7, 8 and 9).
  • a single rigid shaft 15 of octagonal section per rotor is particularly required (see Fig. 15) and at least two or more bearings 16 with their respective carrier separators bearings 17 (see Figs.
  • each piece that is assembled to form the assembly has concavity or conicity, or similar according to requirement, on any coupling surface.
  • Said concavity or conicity, or the like allows the set of parts that make up each rotor 8, adjust respectively in the direction of its concavity or taper, or the like, and in a stable and safe manner, that is, in optimal assembly conditions for A tillage without setbacks.
  • Each assembled rotor 8 is configured by multiple propellers 10 of four or more blades 19, in perpendicular planes with respect to its axis of rotation "e" (see Figs. 2, 3 and 15), and in quantity determined by the working width requested.
  • a concave or conical washer 11, or similar is mounted on the octagonal shaft 15 that each rotor 8 possesses, with its concavity or taper, or the like , in the opposite direction to the mounting direction (see Figs. 2, 4, 16 and 17);
  • a propeller separator 18 of symmetrical design is interposed, in the octagonal rigid axis 15 and in position, such that, its concavity or taper, or similar, they must coincide, (see Figs. 2, 4, 12 and 15); f) then a similar operation is repeated, assembling a new propeller 10 of four or more blades 19 to 45 ° with respect to the previous propeller 10 of four or more vanes 19, (see Fig. 4);
  • a bearing carrier separator 17 with its respective bearing 16 is mounted on the other end of the octagonal shaft 15, (see Figs. 2, 13, 14 and 15);
  • a concave or conical washer 11, or the like is assembled in the direction of adjustment at the end of the octagonal shaft 15, and the assembly is fixed, by means of a clamping nut with pressure gland, (see Figs. 1, 2 and 16),
  • FIGs 6 and 8 show elevation views of a propeller 10 of four or more blades 19, primary or front 10-1 and secondary or rear 10-D of the invention, respectively, where it is possible to distinguish: its particular derivative design at least one circumference of radius 22, and its octagonal axial perforation 20 for assembly adjustment with its respective octagonal axis 15.
  • the concave or conical surface, or similar 21, optional which can possess a propeller 10 of four or more blades 19, primary 10-1 and secondary 10-D, respectively.
  • Each propeller 10 of four or more blades 19, is configured from eight or more straight cuts, and eight or more cuts in a semicircular radius.
  • a second blade 19 is configured similarly, by: a first straight cut that starts at point “e” and ends at point “d”, located on the coordinate axis "X”, a second straight cut that is It begins at point “f, or rip-off point, and ends at point” g ", and a third cut in semicircular radius” r “, which starts at point” g “and ends at point” h “or trapped space terroirs on the "Y" coordinate axis.
  • a third blade 19 is configured by: a first straight cut that starts at point “i” and ends at point “h”, located on the "Y" coordinate axis, a second straight cut that begins at the point "j”, or the rip-off point, and ends at the point “k”, and a third cut at the semicircular radius "r”, which starts at the point "k” and ends at the point “I” or space catches terroirs on the coordinate axis "X”.
  • a fourth blade 19 is configured by: a first straight cut that starts at point “m” and ends at point ⁇ ", located on the coordinate axis" X ", a second straight cut that starts at point” n “, or spindle tip, and ends at point” o “, and a third cut in semicircular radius” r “, which starts at point” o “and ends at point” p “or space catches terroir in the axis of coordinates "Y”
  • a tillage or propeller tool 10 of four or more blades 19 is configured, further characterized by an oblique cut 23 or bevel for parting off the surface layer of earth, which extends along the entire perimeter of the tillage tool or propeller 10 of four or more blades 19, (see Figs.
  • the dimension of the octagonal axial bore 20 of the propeller 10 of four or more blades 19, is coincident with the inner dimension of spacers 17 and 18 and washers 11, and slightly larger than the octagonal axis of assembly laje 15, existing tolerance for assembly adjustment. In this way, it is possible to assemble the pieces on the octagonal mounting shaft 15, to configure a rotor 8 of the harrow 1 of the invention.
  • the concave or conical or similar pattern 21 of the propeller 10 is concentric with respect to its axial perforation 20, and coincides with the concavity or conicity, or similar, of separators 17 and 18 of propellers 10 and washers 11, indispensable for a perfect assembly adjustment, which is stable and safe during tillage work.
  • the cleaning of the blades 10 is carried out mechanically, by means of the action of scrapers 12, which are located on the back side of each body 9 of the harrow 1, fixed to the scraper bar 13, (see Figs. 1 and 20). They are positioned in parallel and in equal numbers with respect to the propellers 10, and to an adequate separation from each other, in order to avoid rubbing. This makes its cleaning effective, and does not allow the residual accumulation of damp terroirs by adhesion, in said propellers 10.
  • FIGS 7 and 9 illustrate side views of the primary 10-1 and secondary 10-D propellers, respectively, where it is possible to observe their concavity or taper, or the like.
  • Figures 10 and 11 are perspective views of a 10-1 primary propeller of four or more blades 19 and another 10-D secondary propeller of four blades 19, respectively, where it is possible to observe its concavity or conicity, or the like 21 , of the propellers 10 of four blades 19, is of great importance during the tillage, because they raise and drop the terroirs by gravity, that is, as they roll and advance, penetrating, removing and crushing the surface layer, making times of a real shovel. In this way, the soil is fluffy, under a condition that is conducive to the conservation of soil moisture.
  • Figure 12 corresponds to an elevation view of a propeller separator 18, where its concavity or conicity, or the like, necessary for an assembly and safe adjustment can be observed, with respect to the propellers 10 of four or more blades 19.
  • Figure 13 is an elevation view of a bearing carrier separator 17.
  • Figure 14 illustrates a longitudinal sectional view of the assembly composed of a bearing 16 in its respective bearing carrier separator 17, to the octagonal shaft 15, and to its respective fork 1, of the two or more that each rotor 8 possesses, primary and secondary, and that in particular are assembled at least, one at each end thereof.
  • Figure 15 corresponds to a partial and perspective view with cross-section B-B ', illustrating the octagonal design of an assembly shaft 15.
  • Figures 16, 17 and 18 show elevation, side and perspective views of a concave or conical washer, or the like 11.
  • Figures 19 and 20 show partial elevation views of one of the two forks 14 supporting both rotors 8, and a propeller scraper 10 of four or more blades 19, respectively.
  • Invention or concept of thundering harrow designed to be used in agriculture as a complement in the preparation of all types of arable land. It is applied later to the application of the plow or plow, whose objective is to banish and mullir the surface as a prerequisite and indispensable, to proceed to the sowing of agricultural land.
  • this new implement manages to uniformly banish the seed bed, not generating large terroirs in it, thanks to the characteristics of its particular design and layout of their tillage tools, spirally arranged in each body. It also makes it possible to reduce the number of applications in the field, as well as in soils of the thin or semi-loose type such as loamy or sandy, respectively, it is recommended to cross them, that is, a first wide application, a second to long and 90 degrees from the previous one. If you have thick or semi-thick soils such as clay or sand-clay, a third optional pass may be necessary, either diagonally or along.
  • This technology optimizes the preparation of soils, reduces operational times and costs, increases productivity yields, objectives that this new concept of agricultural implements for traits achieves, which has its own technical characteristics and that contributes to giving a global solution to new demands.
  • in the preparation of soils in the field of agricultural machinery.
  • it benefits farmers and assures them that they have the appropriate and indispensable tool to maintain a profitable and sustainable business over time, so that they can compete in an increasingly competitive agricultural market.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Soil Working Implements (AREA)

Abstract

L'invention concerne un outil agricole pour herse excentrique de type à remorque (fig.1), modifiée par rapport à son homologue, qui résout le problème de son assemblage complexe et de son entretien rigoureux, au moyen d'une mécanique simple et fonctionnelle, d'une utilisation facile, qui émotte et ameublit la couche superficielle de terre, qui est efficace dans la préparation des sols agricoles. Ladite herse comprend un châssis pourvu d'un attelage frontal pour son transport (fig.1), un train à roues pour le transport qui règle la profondeur des cultures ; deux corps primaire et secondaire fixés à des fourches boulonnées au châssis (fig. 2 et 3) et composés en outre d'arbres (fig.15) , de disques (fig. 17), de grattoirs (fig. 20) et d'outils de labourage ou d'hélices à quatre pales présentant un gaufrage concave ou conique ou similaire (fig. 5, 6 et 7), un biseau de coupe périphérique et disposées en spirale (fig. 1 et 4). Parmi les hélices, celles gaufrées vers la gauche (10-1) sont assemblées dans le rotor primaire (fig. 1, 6 et 7) et celles gaufrées vers la droite (10-D) dans le rotor secondaire (fig. 1, 8 et 9), vue de face, et elles sont constituées d'au moins un disque présentant un trou axial octogonal qui est assemblé à son arbre octogonal (fig. 5), qui permet l'assemblage des hélices contiguës l'une après l'autre à un angle de 45°, son trou octogonal coïncidant avec celui des séparateurs (fig. 12 et 13) et des disques (fig.16, 17 et 18), et l'épaisseur de l'arbre augmentant. Une certaine tolérance au réglage de l'ensemble existe, son gaufrage correspond à la concavité et à la conicité ou similaire, des séparateurs et des disques, ce qui est indispensable à un ensemble stable et sécurités d'un corps de l'invention (fig. 2).
PCT/CL2012/000047 2011-10-04 2012-08-30 Herse à hélices d'émottage WO2013049951A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL2468-2011 2011-10-04
CL2011002468 2011-10-04

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WO2013049951A1 true WO2013049951A1 (fr) 2013-04-11

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB801132A (en) * 1953-11-24 1958-09-10 Ontwikkelingmij Multinorm Nv Equipment for working soil
GB2122062A (en) * 1982-06-16 1984-01-11 Nat Res Dev Rotary disc harrows
DE3643787A1 (de) * 1986-12-20 1988-06-30 Knuth Boedecker Scheibenartige vorrichtung zur bodenbearbeitung
KR20010064917A (ko) * 1999-12-20 2001-07-11 강 재 성 트랙터용 접시형 쟁기날
WO2004004437A1 (fr) * 2002-07-05 2004-01-15 Väderstad-Verken Ab Ensemble de travail des sols a disques inclines
FR2867943A1 (fr) * 2004-03-24 2005-09-30 Michel Evin Disque de travail du sol et machine de traitement du sol equipee de tels disques
EP2364582A2 (fr) * 2010-03-12 2011-09-14 Deere & Company Ensemble de section de disque
US20110240319A1 (en) * 2010-03-31 2011-10-06 Canyon Street Crossing Limited Liability Company Shallow concavity scalloped disc blade

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB801132A (en) * 1953-11-24 1958-09-10 Ontwikkelingmij Multinorm Nv Equipment for working soil
GB2122062A (en) * 1982-06-16 1984-01-11 Nat Res Dev Rotary disc harrows
DE3643787A1 (de) * 1986-12-20 1988-06-30 Knuth Boedecker Scheibenartige vorrichtung zur bodenbearbeitung
KR20010064917A (ko) * 1999-12-20 2001-07-11 강 재 성 트랙터용 접시형 쟁기날
WO2004004437A1 (fr) * 2002-07-05 2004-01-15 Väderstad-Verken Ab Ensemble de travail des sols a disques inclines
FR2867943A1 (fr) * 2004-03-24 2005-09-30 Michel Evin Disque de travail du sol et machine de traitement du sol equipee de tels disques
EP2364582A2 (fr) * 2010-03-12 2011-09-14 Deere & Company Ensemble de section de disque
US20110240319A1 (en) * 2010-03-31 2011-10-06 Canyon Street Crossing Limited Liability Company Shallow concavity scalloped disc blade

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