US3693833A - Sowing device with pneumatic seed separator - Google Patents

Sowing device with pneumatic seed separator Download PDF

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Publication number
US3693833A
US3693833A US96748A US3693833DA US3693833A US 3693833 A US3693833 A US 3693833A US 96748 A US96748 A US 96748A US 3693833D A US3693833D A US 3693833DA US 3693833 A US3693833 A US 3693833A
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United States
Prior art keywords
drum
bores
chamber
sowing device
shaft
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
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US96748A
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English (en)
Inventor
Otto Weitz
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AJ Troester GmbH and Co KG
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AJ Troester GmbH and Co KG
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Filing date
Publication date
Priority claimed from DE1962150A external-priority patent/DE1962150C3/de
Priority claimed from DE19702019394 external-priority patent/DE2019394A1/de
Priority claimed from DE19702052468 external-priority patent/DE2052468A1/de
Application filed by AJ Troester GmbH and Co KG filed Critical AJ Troester GmbH and Co KG
Application granted granted Critical
Publication of US3693833A publication Critical patent/US3693833A/en
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/04—Single-grain seeders with or without suction devices
    • A01C7/042—Single-grain seeders with or without suction devices using pneumatic means
    • A01C7/044—Pneumatic seed wheels
    • A01C7/0445—Seed ejectors
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/04—Single-grain seeders with or without suction devices
    • A01C7/042—Single-grain seeders with or without suction devices using pneumatic means
    • A01C7/044—Pneumatic seed wheels
    • A01C7/0443—Seed singulators

Definitions

  • a vehicle-mounted sowing device includes a continu- 3 A i' Troster l i ously rotating drum, centered on a horizontal shaft, Germany axially divided into a pick-up chamber and a distribut- [22] Filed: Dec. 10, 1970 ing chamber, the latter being peripherally subdivided into a multiplicity of outwardly open compartments [21] Appl.
  • No.: 96,748 which communicate with the pick-up chamber at the zenith of the drum and withan outlet at the nadir 30 F i Applicmon p D8 thereof.
  • the peripheral wall of the pick-up chamber has a multiplicity of generally radial bores leading to a [969 Germany 19 62 150-2 suction manifold via an arcuate slot which surrounds P 22, 1970 Germany 20 19 394-6 the drum over about half its circumference, terminat- 1970 20 52 468-9 ing at the zenith where seeds or kernels introduced into this chamber at its bottom and carried by the suc- [52 0.8. CI. ..221/211 ti in respective bores to the top are released from [5l] Int. Cl.
  • the present invention relates to a device for the sowing of seeds orkernels which can be carried on a moving vehicle for depositing them individually and with substantially uniform spacing in a furrow of a field.
  • a moving vehicle could be self-propelled or designed as a trailer or attachment for a tractor.
  • Various devices are known for mechanically or pneumatically separating the individual kernels to be thus deposited.
  • the purely mechanical systems utilize compartmented rings with generally radial discharge ducts on a disk rotating jointly with the ring, a special ejector being operative in a predetermined position of any compartment to release a kernel, individually stored therein, by way of the associated discharge duct.
  • the kernels that can be accommodated in the compartments of such a ring or wheel must fall within a relatively narrow range of sizes so that different rings mustbe used for different types ofseed; thisrequires cumbersome and time-consuming disassembly and reassembly procedures.
  • the second chamber hereinafter referred to as the distributing chamber, is peripherally subdivided into a multiplicity of compartments for individual kernels respectively aligned with the bores of the first chamber, the cutout of the intervening partition being traversed by guide means for directing each released kernel into a respective compartment of the second chamber; the latter has a rotatable end wall and generally radial internal walls connected therewith and projecting therefrom to thestationary partition for substantially guiding an individual kernel during rotation of the drum and for delivering the kernel to an outlet at the bottom of the second chamber.
  • the guide means traversing the cutout of the partition may be an apron formed integrally therewith to act as a chute for the released kernels, this apron preferably including with the vertical an-angle of less than 45C.
  • this cutout as viewed in the direction of drum rotation, the inner surface of the drum may be swept in the vicinityof its suction bores by stripper means in the form of one or more rods, ad- I vantageously carried'on the stationary bearing of the partial vacuum from which each perforation is disconnected upon reaching arelease position, thereby allowing an entrained kernel to drop into'an outlet therefor.
  • the invention aims at obviating the aforestated drawbacks and providing a sowing device capable of reliably separating and distributing-kernels of various sizes without theinterchanging of parts.
  • a more specific object of thisinvention is to provide a pneumatically operating distributor for such a device which avoids the irregularities of seed disposition resulting in conventional machines of this type from the uncontrolled resulting of successively released kernels into a furrow.
  • the first chamber hereinafter referred to as the pick-up chamben is provided with a multiplicity of peripherally spaced bores each communicating with a source of partial vacuum while ascending from a bottom position to an elevated position adjacent the aforementioned cutout for picking up individual kernels from a mass of such kernels at the bottom of the first chamber and for releasing each kernel in such elevated 5' leading to the suction channel, the action of a brush or drum shaft, for dislodging supernumerary kernels which are thus allowed to fall back to the bottom of the pick-up chamber before reaching the transfer chute.
  • the diameter of the terminal portion would be less than that of the smallest kernel seated thereon; the depth of this terminal portion should be about equal to orless than half the diameter of that exit portion to prevent any obstruction of the bore by elongate fragments.
  • the bores may progressively increase in cross section from the seat to the exit portions; in order to accommodate kernels of widely varying sizes, however, the restricted seats may be formed as perforations in a relatively thin ring removably overlying the inner peripheral surface whereby seats of different diameters may be provided by the replacement of one perforated ring with another.
  • Such a ring whether exchangeable or not, can be made of highly wear-resistant low-friction material to facilitate the operation of the stripping means engaging its surface.
  • the seat-forming bores advantageously open onto a tapered or beveled outer peripheral drum surface closely juxtaposed with a similarly tapered inner peripheral housing surface forming an entrance slot for the suction channel with which each bore is to communicate during all or at least a major part of its ascending motion.
  • the drum may be journaled in its housing with freedom of limited axial motion relative thereto and may be urged by biasing means, such as a spring, into a position of closest approach of these tapered surfaces, high-pressure contact between the two surfaces being prevented by suitable stop means such as a bolt adj'ustably screwed to a hub portion of the drum slidably carried on the drum shaft.
  • biasing means such as a spring
  • FIG. 1 is an elevational view, in axial section, of a sowing device embodying the invention
  • FIG. 2 is a cross-sectional view taken on the line II- II of FIG. 1;
  • FIG. 2a is a detail view of an element of the assembly shown in FIGS. 1 and 2;
  • FIG. -3 is a cross-sectional view taken on the line III- IIIof-FIG. 1'; v r I FIGS. 4 '5 and 6 are fragmentary cross-sectional views'respectively takenon lines IV--IV, VV and Vl- Vl ofFIG. 2; and 11 FIGS. 7-9 are cross-sectional vi ws similar to FIGS. 4 6,'illustratin'g certain modificationsi
  • the device generally designated 1 in FIGS. 1-3 forms part of a transportable unit having a wheeled undercarriage 100 as diagrammatically illustrated in FIG. 2; this 'unit may be towed or otherwise propelled across a fieldin a direction indicated by an arrow 66 in FIG. 2.
  • Unit 1 comprises a housing 2 with a hopper 3 at its top for seed material to be dropped into a furrow which may just have been ploughed by a tractor pulling the carriage 100.
  • Housing 2 forms a bearing 38 for a horizontal drive shaft 4 having a sprockets keyed to one endthereof. Power may be supplied to shaft 4 by a chain 101 linking the sprocket 5 with a similar sprocket 102 on awheel shaft 103 of-carriage 100 as indicated diagrammatically in FIG. 1.
  • shaft 4 carries a hub 51 of a drum 6 which is rotatably entrained by the shaft through the intermediary of a transverse pin 7 received in a diametrical bore 7a of the shaft and passing through slots 8 in the hub with sufficient play to allow for limited axial slidability of the hub on the shaft.
  • a biasing spring 9 bears on the one hand upon the hub 51 and on the other hand upon the projecting extremities of pin 7 so as to urge the hub and the drum toward the right with reference to the shaft and the housing 2 as viewed in FIG. 1.
  • Such rightward shifting of drum 6 is limited by a bolt 50 screwed into an end cap 52 integral with hub 51, bolt 50 being locked in place by a couternut 53 so as to bear uponthe confronting end of shaft 4 in a position in which a frustoconically tapering outer peripheral surface 40 of the drum is closely spaced (e.g., up to 0.4 mm) from or just touches a similarly tapered inner peripheral surface 40 of housing 2.
  • a frustoconically tapering outer peripheral surface 40 of the drum is closely spaced (e.g., up to 0.4 mm) from or just touches a similarly tapered inner peripheral surface 40 of housing 2.
  • a collar 54 clamped onto shaft 4 by a setscrew 54a, prevents any axial shifting of this shaft in its bearing 38.
  • the frustoconical housing surface 40 is formed with an entrance slot 29. for an annular suction channel or exhaust manifold 29centered on the axis of shaft 4, this channel forming part of a low-pressure conduit system connected via a nipple 30 to a vacuum pump as diagrammatically represented by an arrow .V in FIGS. 2 and 3.
  • Slot 29' extends over an arc of approximately from the nadir to thezenith of the drum on theascending side thereof when the drum rotates clockwise (arrows. 62) as viewed in FIG; 2.
  • Channel 29 is formed'in an extension 330 of a peripheral housing wall 33 which encircles a larger section 26 of drum 6 and is formed at its bottom with an outlet 34 for the dissemination of seed from hopper 3.
  • This seed e.g., kernels of Indian corn (maize)
  • a chamber 13 of housing 2 into a generally trapezoidal opening 15 at. the bottom of a stationary end wall 12 mounted on bearing 38.
  • a stationary partition 16, axially spaced from wall 12, is also supported on this hearing, the two vertical plates 12 and 16 being held in position by screws 17 threaded into ribs 38' of bearing 38 and surrounded by sleeves 18 designed to hold these plates apart.
  • Partition 16 separates a first or pick-up chamber 14, formed in a reduced section 27 of drum 6, from an axially adjoining second or distributing chamber 26' formed in the drum section 26.
  • the annular wall of section 27 is provided with a multiplicity of peripherally equispaced bores 28 opening onto the beveled outer surface 40' thereof and extending substantially at right angles to that surface.
  • Chamber 26 is peripherally subdivided, by generally radial internal walls 37, into a multiplicity of compartments for individual kernels, these compartments being outwardly open and corresponding in number to the bores 28 aligned therewith.
  • Apron 20 extends upwardly into chamber 14 at an angle'of less than 45 to the vertical, preferably about 35 as shown.
  • the internal walls 37 are in the form of substantially J-shaped scoops or webs interconnecting a flange portion 36' of wheel 6, extending outwardly fromsection 27 thereof in spaced relationship with housing portion 33a, and an outer wall 36 rigid with hub 51.
  • the foot 37a of the J of each scoop 37 is proximal to the drum shaft 4 while the stem of the J is continuously curved so that its convex side faces in the direction of rotation 62.
  • Each web 37 has an intermediate point P whereits tangent r is radial, passing'through the drum axis 0, and beyond which it recedes as viewed in the direction of rotation, thereby including an angle of somewhat less than 90 with the surrounding flange 33 to form a pocket for more positive guidance of a kernel to be swept toward the outlet.
  • bores 28, fonning seats for the kernels to be picked up have diameters less-than that of thesmallest kernel to be entrained.
  • These bores are interleaved with relatively shallow recesses 35 of substantially triangular profile, as best seen in FIG. 6, whose largest diameter greatly .exceeds that of the seats formed by the bores 28"and which serve to carry individual kernels to the region of suction on the ascending drum side indicated by an arrow A in FIG. 3.
  • These stripping elements include a pair of rods 23 and 24.whose free ends straddle the path of the bores 28 on theas'cending side of the drum, thus ahead of the transfer location defined by web 31 and, groove'32 as viewed in the direction of drum rotation, these rods serving to detach supernumerary kernels that may adhere to theperipheral chamber wall in the vicinity of the bores 28 or that may have become wedged in some of the recesses 35. Downstream of the transfer location, i.e., on the descending side of the drum, this peripheral surface is swept by a brush 39 on a stem 25 and by a scraper 61 on a stem 25a, this scraper being disposed beyond the brush as viewed in the direction of rotation. As best seen in FIG. 2a, scraper 61 has a head 64 forming a sharp cutting edge 63 which lies in the path of thebores 28 so as to clip any kernel fragment projecting from one of these bores and not previously dislodged therefrom by the brush 39.
  • FIGS. 7-9 illustrate a solution to this problem according to which each bore 28 is provided with a restricted seat portion 28a (FIG. 8) or 23b (FIGS. 7 and 9) .Of a diameter substantially less than that of the exit portion of the bore communicating with slot 29, the diameter of the seat being advantageously not greater than half the diameter of the bore exit and the width of the slot.
  • the depth of m seat 28a or 28b should also be substantially less than the bore exit portion, preferably equal to or smaller than the seat diameter, as shown.
  • pick-up chamber 14 is bounded by a unitary peripheral wall 6b forming the bores 28 with their restricted inlets 28b and a frustoconically shaped transition zone 28c.
  • the corresponding peripheral wall 6a has its inner surface overlain by a diaphragm ring which is perforated at 28a to form the restricted seat and which has other, larger perforations constituting the recesses 35.
  • Ring 60 which may be held in position by countersunk screws not showmadvantageously consists of a wear-resistant low-friction material; stainless steel or synthetic resins, e.g., polyethylene preferably of the hard, sintered low-pressure type, are suitablefor this purpose.
  • kernels accumulating at the bottom of chamber 14 are pneumatically entrainedby the bores 28 with mechanical assistance from the recesses 35.
  • web 31 cuts off the partial vacuum previously applied to these bores so that the respective channels are released and areidirected by chute 20 into respective compartments 26of the adjoining distributing chamber.
  • the kernels are individually conducted to the outlet 34 where they are successively deposited in the furrow aligned therewith. With the drum speed proportional to the forward velocity of the'vehicle, the spacing of the kernels will be substantially independent of that velocity.
  • a sowing device comprising:
  • a transportable housing provided with a bottom outlet for kernels to .be individually deposited in the soil;
  • stationary partition means anchored to said housing and dividing the interior of said drum into a first chamber and a second chamber axially juxtaposed therewith, said partition means being provided with a cutout above the level of said axis for establishing communication between said chambers, said first chamber being provided with a multiplicity of peripherally spaced bores forming seats for kernels to be deposited, said second chamber being peripherally subdivided into a like multiplicity of compartments respectively aligned with said bores for individually communicating therewith in an elevated position by way of said cutout;
  • a source of partial vacuum including a suction channel in said housing communicating with each of said bores on an ascending side of said drum between a bottom position and said elevated position;
  • inlet means for introducing a mass of kernels into the bottom of said first chamber for individual entrainment by said bores on said ascending side and release therefrom in said elevated position;
  • said second chamber having a rotatable end wall and generally radial internal walls connected therewith and projecting therefrom to said stationary partition means for substantially guiding an individual kernel during rotation of the drum and delivering the kernel to an outlet at the bottom of said second chamber.
  • a sowing device as defined in claim 2 wherein said partition means comprises a plate; of sheet material formed with an apron rising from a bottom edge of said cutout towardthe top of said first chamber at an'angle of less than 45- to the vertical. j I I 4.
  • a sowing device as defined in claim 4j wherein said stem is curved with a convex side facing in the direction of rotation of said drum and with a radial tangent at an intermediate point of its length.
  • stripping means comprises at least one rod contacting said-wall surface ahead of said elevated position f detaching adhering supernumerary kernels.
  • stripping means comprises at least one sweeping member contacting said wall surface beyond said elevated position for dislodging residual matter from said bores.
  • a sowing device as defined in claim 9 wherein said sweeping member comprises a scraper with a cutting edge in the path of said bores.
  • suction channel is substantially wider than said bores, each bore having an exit portion opening into said channel with a diameter substantially exceeding both the diameter and the depth of its restricted termihal portion.
  • suction channel is curved about said axis and is provided with an entrance slot on a tapered inner peripheral housing surface, said slot extending over at least part of the ascending side of said first chamber, said bores opening onto a'tapere d outer drum surface closely juxtaposed with said inner housing surface.
  • a sowing device as defined in claim 19 wherein said drum is provided with a shaft and wherein said housing forms bearing means for said shaft, said drum having a hub axially slidable on said shaft, further comprising biasing means urging said drum in a position of closest approach of said tapered surfaces, said hub and said shaft being provided with coacting stop means for preventing high-pressure contact between said tapered surfaces.
  • a sowing device as defined in claim-20 further comprising a stationary'end wall bounding said first chamber, said end wall and said partition means being spacedly supported on said bearing means.
  • a sowing device comprising:
  • a transportable housing provided with an outlet for kernels to be individually deposited in the soil, said housing having a tapered inner peripheral surface centered on a horizontal axis;
  • drum mounted on said shaft for rotation about said axis and limited axial displacement relative to said housing, said drum having a tapered outer peripheral surface juxtaposed with said inner peripheral surface and further having an inner peripheral wall surface provided with a multiplicity of peripherally spaced bores forming seats for kernels to be deposited, said bores opening onto said outer peripheral surface;
  • source of partial vacuum including a suction channel in said housing provided with an entrance slot on said inner peripheral surface communicating with said surface on an ascending side of said outer peripheral surface;
  • inlet means for introducing a mass of kernels into the bottom of said drum for individual entrainment by said bores on said ascending side and release therefrom in an elevated position at an upper end of said slot;
  • biasing means bearing axially upon said drum for urging same into a position of closest approach of said tapered surfaces

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
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US96748A 1969-12-11 1970-12-10 Sowing device with pneumatic seed separator Expired - Lifetime US3693833A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1962150A DE1962150C3 (de) 1969-12-11 1969-12-11 Pneumatische Einzelkornsävorrichtung
DE19702019394 DE2019394A1 (de) 1970-04-22 1970-04-22 Pneumatische Einzelkornsaevorrichtung
DE19702052468 DE2052468A1 (de) 1970-10-26 1970-10-26 Pneumatische Einzelkorn-Sävorrichtung

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AT (1) AT307782B (fr)
CA (1) CA932592A (fr)
FR (1) FR2073575A5 (fr)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848552A (en) * 1971-07-13 1974-11-19 J Bauman Seed dispenser for planters
US3999690A (en) * 1975-09-17 1976-12-28 White Farm Equipment Company Metering apparatus for a seed planter
US4162744A (en) * 1976-10-28 1979-07-31 Barker Brynley M Seed dispensing device
US4251011A (en) * 1978-10-19 1981-02-17 Hamilton Thomas W Machines for handling seeds
US4646939A (en) * 1982-04-09 1987-03-03 Societe Sogefina, Societe De Gestion Financiere Armoricaine (Societe Anonyme) Selector device for the distributor of a so-called "single seed" seed drill
US5170909A (en) * 1983-10-31 1992-12-15 Deere & Company Vacuum seed meter
US5392707A (en) * 1993-04-22 1995-02-28 Romans; William W. Seed metering device
US6044779A (en) * 1998-04-15 2000-04-04 Case Corporation Multiple drop seed disc
US6109193A (en) * 1995-12-29 2000-08-29 Case Corporation Seed planter apparatus and method
WO2001083161A1 (fr) * 2000-05-03 2001-11-08 Rosenboom Lyn A Plantoir
US6564730B2 (en) 1995-12-29 2003-05-20 Case Corporation Seed planter apparatus and method
US20120240838A1 (en) * 2011-03-25 2012-09-27 Garner Elijah B Planting unit for a seeding machine having a seed meter and seed delivery system
US20160044861A1 (en) * 2014-08-18 2016-02-18 Horsch Maschinen Gmbh Metering disk of a distribution device for granular material
US9693498B2 (en) 2011-03-25 2017-07-04 Deere & Company Seed-double eliminator for a planting unit
US10021825B2 (en) 2014-08-18 2018-07-17 Horsch Maschinen Gmbh Metering disk of a distribution device for granular material
USRE48572E1 (en) 2009-02-02 2021-06-01 Deere & Company Planting unit for a seeding machine having blocking member to control hand-off of seed from a seed meter to a seed delivery system
US11252856B2 (en) * 2015-11-06 2022-02-22 Kinze Manufacturing, Inc. Multiple agricultural product application method and systems
CN114271076A (zh) * 2021-12-14 2022-04-05 华中农业大学 组合式充种排种器
US11770994B2 (en) 2009-02-02 2023-10-03 Deere & Company Seeding machine with seed delivery system
US11877530B2 (en) 2019-10-01 2024-01-23 Ag Leader Technology Agricultural vacuum and electrical generator devices, systems, and methods
US11997939B2 (en) 2017-10-03 2024-06-04 Ag Leader Technology Controlled air pulse metering apparatus for an agricultural planter and related systems and methods
US12144282B2 (en) 2018-02-09 2024-11-19 Ag Leader Technology Seed spacing device for an agricultural planter and related systems and methods
US12477972B2 (en) 2019-08-19 2025-11-25 Ag Leader Technology Adjustable seed meter and related systems and methods
US12507611B2 (en) 2019-01-25 2025-12-30 Ag Leader Technology Dual seed meter and related systems and methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960258A (en) * 1953-10-12 1960-11-15 John M Dodwell Apparatus for seed planting
US2991909A (en) * 1956-07-17 1961-07-11 Lamazou Jean Single seed sowing machine
US3133676A (en) * 1960-12-15 1964-05-19 Ben Pearson Inc Planter having pneumatic seed handling means
US3387746A (en) * 1966-11-28 1968-06-11 Robert F Ashley Selective seed planter
DE1283589B (de) * 1966-03-04 1968-11-21 Dr Wilhelm Knolle Einzelkornsaemaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960258A (en) * 1953-10-12 1960-11-15 John M Dodwell Apparatus for seed planting
US2991909A (en) * 1956-07-17 1961-07-11 Lamazou Jean Single seed sowing machine
US3133676A (en) * 1960-12-15 1964-05-19 Ben Pearson Inc Planter having pneumatic seed handling means
DE1283589B (de) * 1966-03-04 1968-11-21 Dr Wilhelm Knolle Einzelkornsaemaschine
US3387746A (en) * 1966-11-28 1968-06-11 Robert F Ashley Selective seed planter

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848552A (en) * 1971-07-13 1974-11-19 J Bauman Seed dispenser for planters
US3999690A (en) * 1975-09-17 1976-12-28 White Farm Equipment Company Metering apparatus for a seed planter
US4162744A (en) * 1976-10-28 1979-07-31 Barker Brynley M Seed dispensing device
US4251011A (en) * 1978-10-19 1981-02-17 Hamilton Thomas W Machines for handling seeds
US4646939A (en) * 1982-04-09 1987-03-03 Societe Sogefina, Societe De Gestion Financiere Armoricaine (Societe Anonyme) Selector device for the distributor of a so-called "single seed" seed drill
US5170909A (en) * 1983-10-31 1992-12-15 Deere & Company Vacuum seed meter
US5392707A (en) * 1993-04-22 1995-02-28 Romans; William W. Seed metering device
US5542364A (en) * 1993-04-22 1996-08-06 Romans; William W. Seed metering device
US6374759B1 (en) 1995-12-29 2002-04-23 Case Corporation Seed planter apparatus and method
US6109193A (en) * 1995-12-29 2000-08-29 Case Corporation Seed planter apparatus and method
US6325005B1 (en) 1995-12-29 2001-12-04 Case Corporation Seed planter apparatus and method
US6401638B1 (en) 1995-12-29 2002-06-11 Case Corporation Seed planter apparatus and method
US6564730B2 (en) 1995-12-29 2003-05-20 Case Corporation Seed planter apparatus and method
US20030154892A1 (en) * 1995-12-29 2003-08-21 Crabb Richard J. Seed planter apparatus and method
US6739272B2 (en) 1995-12-29 2004-05-25 Cnh America Llc Seed planter apparatus and method
US6776108B2 (en) 1995-12-29 2004-08-17 Cnh America Llc Seed planter apparatus and method
US6044779A (en) * 1998-04-15 2000-04-04 Case Corporation Multiple drop seed disc
WO2001083161A1 (fr) * 2000-05-03 2001-11-08 Rosenboom Lyn A Plantoir
US11770994B2 (en) 2009-02-02 2023-10-03 Deere & Company Seeding machine with seed delivery system
USRE48572E1 (en) 2009-02-02 2021-06-01 Deere & Company Planting unit for a seeding machine having blocking member to control hand-off of seed from a seed meter to a seed delivery system
US11849665B2 (en) 2009-02-02 2023-12-26 Deere & Company Seeding machine with seed delivery system
US11793104B2 (en) 2009-02-02 2023-10-24 Deere & Company Seeding machine with seed delivery system
US11770995B2 (en) 2009-02-02 2023-10-03 Deere & Company Seeding machine with seed delivery system
US9693498B2 (en) 2011-03-25 2017-07-04 Deere & Company Seed-double eliminator for a planting unit
US20120240838A1 (en) * 2011-03-25 2012-09-27 Garner Elijah B Planting unit for a seeding machine having a seed meter and seed delivery system
US10206326B2 (en) 2011-03-25 2019-02-19 Deere & Company Planting unit for a seeding machine having a seed meter and seed delivery system
US8850998B2 (en) * 2011-03-25 2014-10-07 Deere & Company Planting unit for a seeding machine having a seed meter and seed delivery system
US9661799B2 (en) 2011-03-25 2017-05-30 Deere & Company Planting unit having a seed meter and an endless seed delivery system
US12514148B2 (en) 2011-03-25 2026-01-06 Deere & Company Planting unit for a seeding machine having a seed meter and seed delivery system
US20160044861A1 (en) * 2014-08-18 2016-02-18 Horsch Maschinen Gmbh Metering disk of a distribution device for granular material
EP2987395A1 (fr) * 2014-08-18 2016-02-24 Horsch Maschinen GmbH Disque de dosage d'un appareil de distribution pour un matériau granulaire
US10021825B2 (en) 2014-08-18 2018-07-17 Horsch Maschinen Gmbh Metering disk of a distribution device for granular material
US11252856B2 (en) * 2015-11-06 2022-02-22 Kinze Manufacturing, Inc. Multiple agricultural product application method and systems
US11997939B2 (en) 2017-10-03 2024-06-04 Ag Leader Technology Controlled air pulse metering apparatus for an agricultural planter and related systems and methods
US12144282B2 (en) 2018-02-09 2024-11-19 Ag Leader Technology Seed spacing device for an agricultural planter and related systems and methods
US12507611B2 (en) 2019-01-25 2025-12-30 Ag Leader Technology Dual seed meter and related systems and methods
US12477972B2 (en) 2019-08-19 2025-11-25 Ag Leader Technology Adjustable seed meter and related systems and methods
US11877530B2 (en) 2019-10-01 2024-01-23 Ag Leader Technology Agricultural vacuum and electrical generator devices, systems, and methods
CN114271076B (zh) * 2021-12-14 2023-03-14 华中农业大学 组合式充种排种器
CN114271076A (zh) * 2021-12-14 2022-04-05 华中农业大学 组合式充种排种器

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FR2073575A5 (fr) 1971-10-01
AT307782B (de) 1973-06-12
CA932592A (en) 1973-08-28

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