Patent Description:
Particulate metering systems use varied approaches to control the rate at which particulate is metered and/or blended with other particulate types. Particulate metering is complicated by the desire to simultaneously meter at separate discharge points varying rates and blends of different particulate. In such instances where the particulate is fertilizer, there's a significant interest in controlling the blend and application rate of two or more fertilizers, and specifically controlling a variation in the blend and application rate of two or more fertilizers at separate discharge points, such as at separate rows in a field. Further complications surround the growing desire to independently control variations in both the blend and application rate of particulate for each separate discharge point or a set of discharge points. Many desire to control the blend and application rate of two or more fertilizers independently at each row unit. In other words, what is desired in at least one application is a dry fertilizer metering system that can make adjustments to both the application rate and blend of two or more fertilizers on a row-by-row basis-one row receiving a blend of fertilizers at a desired rate while another row simultaneously receives the same or a separate blend of fertilizers at the same or another desired rate.

<CIT> discloses an apparatus for accelerating and conveying particulate material where the particulate material accelerator conveyor includes a housing having a wall with openings therein for an air inlet, a particulate material inlet, and a mixture outlet; a feed auger rotatably mounted in the housing and in fluid communication with the particulate material inlet so as to convey particulate material from the inlet into an acceleration chamber within the housing; and a fan rotatably mounted in the housing in fluid communication with the air inlet and the acceleration chamber. However, the apparatus is limited to a single particulate material accelerator.

<CIT> generally relates to an agricultural implement, and more specifically, to a distribution system for distributing particulate material to a plurality of seeding units configured to inject the particular material into the ground. However, the implement does not teach a mixing area for multiple particulates.

<CIT> provides an agricultural seed metering and distribution apparatus having a seed stream sample collector where the entire plurality of seed streams of the apparatus can be collected in one sample collector for a quick and easy determination of the actual amount of seeds or fertilizer being metered from the apparatus and then be adjusted so as to deliver the desired metered rate. However, the apparatus does not have a metering control in operable communication with the air input.

The present disclosure provides a particulate metering system with variable blend and variable application rate controls for separate discharges or a group of discharges. A particulate metering system is provided as defined in claim <NUM>.

The particulate metering system can include a rate controller. The rate controller is in operable control of the one or more metering controls and controls the introduction rate of the plurality of inputs into the confluence.

One or more metering controls can be in operable communication with the air input and the particulate inputs for controlling a blend of the plurality of inputs at the confluence. A plurality of conveyance speeds can be associated with the operated conveyances. The two or more particulate sources are operatively connected to the plurality of particulate inputs and the one or more metering controls. The particulate metering system includes a plurality of particulate accelerators, each comprising a plurality
of air-particulate interfaces, a particulate-air mixing area, and an air-particulate output. Each of the
particulate accelerators has an air input. The system includes a plurality of particulate sources associated with each of the particulate accelerators. Each of the particulate sources has a terminal discharge end at one of the air-particulate interfaces. The air input of each
of the particulate accelerators receives an air flow from an air production system. Each of the particulate accelerators receives particulate from the particulate sources across the air-particulate interfaces. A confluence of the air flow and the particulate occurs in the mixing area of each of the particulate accelerators. A plurality of discharges is provided. Each of the discharges is associated with the air-particulate output of one of the plurality of particulate accelerators.

The metering system includes a plurality of operated conveyances in communication with each of the plurality of particulate accelerators. Each of the operated conveyances is associated with one of the air-particulate interfaces. A plurality of metering controls can be provided. The metering controls can be in operative communication with the particulate sources and the operative conveyances. The plurality of metering controls can control the amount of one or more types of particulate metered across the air-particulate interfaces.

The metering system can include a first subset of the plurality of particulate accelerators and a first subset of the plurality of discharges in fluid connection with the first subset of the plurality of particulate accelerators. A first mass flow rate can correspond generally with the particulate-air confluence at the first subset of the plurality of discharges. The system can include a second subset of the plurality of particulate accelerators and a second subset of the plurality of discharges in fluid connection with the second subset of the plurality of particulate accelerators. A second mass flow rate can correspond generally with the particulate-air confluence at the second subset of the plurality of discharges. The first mass flow rate and the second mass flow rate can be unequal.

Illustrated embodiments of the disclosure are described in detail below with reference to the attached drawing figures, and where:.

<FIG> and <FIG> show a particulate metering implement <NUM>. While the figure shows a particulate metering implement, it should be appreciated by those skilled in the art that the disclosure covers other types of implements, including but not limited to, seed meters, nutrient applicators, and other agricultural equipment. The implement <NUM> can be a towable trailer, as shown, or integrally formed with a particulate application system. As shown in conjunction with <FIG>, the implement can include a frame assembly <NUM>, particulate container assembly <NUM>, particulate handling system <NUM>, and air production system <NUM>, air handling system <NUM>, and particulate accelerator system <NUM>.

Referring to <FIG> and <FIG>, a base frame assembly <NUM> is provided. The base frame assembly <NUM> can include a plurality of wheels <NUM> to permit transportation of the implement <NUM>. The implement <NUM> can be transported through other means commonly known in the art, including but not limited to, a tracking system, sled rails, spheres, or the like. The wheels <NUM> can be connected to a transverse base support member <NUM>. The transverse base support member <NUM>, together with two rear longitudinal base support members <NUM>, can provide the primary support for intermediate frame assembly <NUM>. Extending anteriorly from the transverse base support member <NUM> can be two front longitudinal base support members <NUM>. The two front longitudinal base support members <NUM> can be shaped to not only connect to the base frame assembly <NUM> below the intermediate frame assembly <NUM>, but also be connectable at a typical mounting height. The front longitudinal base support members <NUM> can be movably connected to coupling members <NUM>. To support the implement <NUM> when not in use, vertical support members <NUM> can be adjustably lowered. The vertical support members <NUM> can be locked into position using a detent structure, transverse locking pin, or any means commonly known in the art. The implement <NUM> can be connected to a tractor, but the prevent disclosure contemplates additional operational environments, including but not limited to agricultural toolbars, trailers, other farm implements, and the like.

The intermediate frame assembly <NUM> can be mounted upon the base frame assembly <NUM>. In particular, longitudinal intermediate support members <NUM> can be connected to rear longitudinal base support members <NUM>. The longitudinal intermediate support members <NUM> can be generally U-shaped to elevate the particulate container (e.g., hopper) assembly <NUM> above the superior aspect of the wheels <NUM>. The configuration can result in a front transverse intermediate support member <NUM> and a rear transverse intermediate support member <NUM> extending outwardly above the superior aspect of the wheels <NUM>. The particulate container assembly <NUM> can be mounted on the front transverse intermediate support member <NUM> and a rear transverse intermediate support member <NUM>. To provide additional support to the front transverse intermediate support member <NUM> and the rear transverse intermediate support member <NUM>, a plurality of braces <NUM> can be provided. The braces <NUM> can create a truss-like structure between the longitudinal intermediate support members <NUM> and the transverse intermediate support members; however, the disclosure contemplates providing reinforcement through any means commonly known in the art.

As shown in <FIG>, the particulate container assembly <NUM> can be mounted on the frame assembly <NUM>, and more particularly, the intermediate frame assembly <NUM>. The particulate container assembly <NUM> can consist of two particulate containers <NUM> and <NUM>. The disclosure envisions any number of particulate containers (e.g., hoppers) can be used. In an embodiment, the particulate containers <NUM> and <NUM> can be identical in structure and function, and symmetrical across Section <NUM>-<NUM> of <FIG>. In other embodiments, the one or more of the particulate containers can be modified without deviating from the objects of the disclosure. Hereinafter, discussion of particulate container <NUM> refers to particulate container <NUM> and its counterpart structure on particulate container <NUM>.

Referring to <FIG>, <FIG> and <FIG>, the particulate container <NUM> can include an upper portion <NUM>, middle portion <NUM> and lower portion <NUM>. The upper portion <NUM> can be a rectangular prism. The disclosure contemplates any shape that maximizes volume and/or permits the storage to extend above the wheels <NUM>. A top surface of the upper portion <NUM> can include openings (not shown) covered by one or more lids <NUM>. The lids <NUM> can be opened or removed to permit loading of particulate into the particulate container <NUM>. The middle portion <NUM> can be a trapezium prism. The shape can assist in funneling the particulate to the lower portion <NUM>. The transition from the upper portion <NUM> to the middle portion <NUM> can be generally demarcated by frame members <NUM> disposed around the perimeter of the middle portion <NUM> of the particulate container <NUM>. The frame members <NUM> can have attachment means <NUM> to connect the particular container assembly <NUM> to the frame assembly <NUM>, and more particularly, intermediate frame assembly <NUM>. As shown in <FIG>, the particulate container <NUM> can have a recessed area <NUM> on the side wall proximate to opposing particulate container <NUM>. The recessed area <NUM> can prevent frame member <NUM> from extending past the plane of the side wall, which maximizes the volume of the particulate container <NUM> while minimizing the space required between the two particulate containers <NUM> and <NUM>. For additional structural support, a plurality of internal support rods <NUM> (<FIG>) can be provided within the interior of the particulate container <NUM>.

In an embodiment illustrated in <FIG>, the one or more lids <NUM> can be pivotally connected to the particulate container <NUM> with one or more hinges <NUM>. One or more clamps <NUM> can be mounted on the particulate container <NUM> proximate the opposing edge of the lids <NUM> to releasably secure the lids to the containers. To assist in opening the lids <NUM>, a handle <NUM><NUM> can be connected to the lids <NUM> proximate to the clamps <NUM>. Upon opening and/or removal of the lids <NUM>, one or more screens (not shown) can be disposed within the openings of the particulate container <NUM> to prevent debris from entering the same.

Further, the clamps <NUM> can provide an airtight seal between the lids <NUM> and the particulate container <NUM>. In such an embodiment, the airtight seal can permit the particulate container <NUM> to be pressurized. In one representative example, the particulate container <NUM> can be pressurized to <NUM>, <NUM>, <NUM> or greater centimeters (ten, fifteen, twenty or greater inches) of water (inH20). The pressurization can assist in guiding the particulate to the particulate handling system <NUM>, provide for improved control of quantities dispensed to the particulate handling system <NUM>, and/or provide for improved control of the environment in which the particulate is housed.

The lower portion <NUM> and the middle portion <NUM> of particulate container <NUM> can be separated by joining flanges <NUM>, as shown illustratively in <FIG> and <FIG>. The joining flanges <NUM> can include material extending from the lower portion <NUM> and the middle portion <NUM>, which are then joined by welding or any means commonly known in the art. The lower portion <NUM> can be a trapezium prism to assist in funneling the particulate to the particulate handling system <NUM>.

The particulate container <NUM> can include a bottom tray <NUM>. As shown in <FIG>, the bottom tray <NUM> can include a plurality of gates <NUM> arranged along the length of the tray <NUM>. The gates can be square and/or rectangular, as shown, or can be of any shape to permit particulate to enter the particulate delivery system <NUM>. Similarly, the gates can all be the same shape and/or size, or of varied shapes and/or sizes based on the application. The interstitial portions of the bottom tray <NUM> can be flat, as shown, or can have a wedged-shape configuration to funnel particulate to the plurality of gates <NUM>. The bottom tray <NUM> can be integrally connected to the bottom portion <NUM> of the particulate container <NUM>, or can be removable to permit a user to quickly install a different bottom tray <NUM> based on the application. The plurality of gates <NUM> can further include smaller gates <NUM> and larger gates <NUM> separated by a raised portion <NUM>. The raised portion <NUM> can funnel the particulate into the smaller gates <NUM> and the larger gates <NUM> and/or add structural support along the length of the bottom tray <NUM>. Separating the particulate into a pair of gates (smaller gate <NUM> and larger gate <NUM>) can minimize undesirable torqueing of the augers <NUM> (<FIG> and <FIG>) and/or the auger motor(s) <NUM> (<FIG> and <FIG>), particularly during initialization of the particulate handling system <NUM>.

One or more scales (not shown) can be associated with each of the particulate containers <NUM> and <NUM> (<FIG>). The scales can be operatively connected to a control system and configured to weigh each of the particulate containers <NUM> and <NUM>. Together with one or more sensors associated with one or more transmissions <NUM> discussed below, the system can provide real-time and/or post-operation feedback of the expected volume of particulate dispensed versus actual volume of particulate dispensed for each unit row of the field and/or for the overall particulate metering implement <NUM>. In an embodiment utilizing real-time feedback, the control system can make adjustments based on the data provided. Further, the data can be used by the control system to diagnose dysfunctional augers <NUM> and/or auger motor(s) <NUM>, and/or identify potential blockages of particulate within the particulate metering implement <NUM>.

A plurality of moveable and/or controllable gate covers (not shown) can be installed on the plurality of gates <NUM> to prevent particulate from filling the short auger tubes <NUM> and the long auger tubes <NUM> while not in use, which can minimize undesirable torqueing on the augers <NUM> and/or the auger motor(s) <NUM> during initialization of the particulate handling system <NUM>. After the augers <NUM> and the auger motor(s) <NUM> are operating at a sufficient speed and torque, the gate covers can be opened to permit particulate to enter the plurality of gates <NUM>.

Referring to <FIG>, <FIG> and <FIG>, the particulate delivery system <NUM> can include a plurality of long auger tubes <NUM> and a plurality of short auger tubes <NUM> disposed below the bottom tray <NUM> of the particulate container <NUM>. The plurality of long auger tubes <NUM> and a plurality of short auger tubes <NUM> can be constructed in two halves for ease of manufacturing, but the present disclosure also contemplates a unitary construction.

Each of the plurality of long auger tubes <NUM> and the plurality of short auger tubes <NUM> can have an input slot <NUM> disposed within the tubes in a position proximate to the bottom tray <NUM>. Referring to <FIG>, <FIG> and <FIG>, the input slots <NUM> can be sized and shaped to receive particulate passing through the plurality of gates <NUM> in the bottom tray <NUM>. An input slot interface <NUM>, including a gasket, as shown in <FIG>, can seal the auger tubes <NUM> and <NUM> to the inferior side of bottom tray <NUM>.

An auger motor <NUM>, as shown in <FIG>, can provide a rotational force to an input shaft <NUM>, as shown illustratively in <FIG>. The input shaft <NUM> can span the length of the particulate container <NUM> and be configured to connect to a plurality of transmission input shaft receivers <NUM> to drive a plurality of transmissions <NUM>. The plurality of transmissions <NUM> can be mounted on the auger tube support beam <NUM>. The plurality of transmissions <NUM> can be connected through pins <NUM> or any other means of connection commonly known in the art. Referring to <FIG> and <FIG>, an auger <NUM> contained within the auger tubes <NUM> and <NUM> can be connected to a transmission <NUM> with a shaft <NUM> disposed on the side opposite the auger. The speed and torque of the plurality augers <NUM> can be determined by the speed and torque provided by the auger motor <NUM> via the plurality of transmissions <NUM>. In an embodiment, a sensor (not shown) monitors the revolutions per minute (RPM) of the shafts <NUM>.

In an embodiment, motors can be connected to and power each of the plurality of augers <NUM>. In such an instance, the plurality of transmissions <NUM>, as shown in <FIG>, can be replaced with a plurality of motors mounted on the auger tube support beam <NUM> or any other suitable location. Each of the plurality of motors can be operatively connected to a control system to generate desired speed of each auger <NUM>, of a group or bank of augers <NUM>, or of all augers <NUM>.

The particulate contained in the particulate container <NUM> passes through the plurality of gates <NUM> and the input slot <NUM> of a long auger tube <NUM>. Referring to <FIG>, <FIG>, <FIG>, an auger drive shaft <NUM> can be rotatably connected to a transmission <NUM> by a bearing <NUM>. Upon receiving an input force from the auger motor <NUM> via a transmission <NUM>, the auger drive shaft <NUM> rotates the auger <NUM>. The helical nature of the auger <NUM> can transmit the particulate contained within the long auger tube <NUM> towards a long auger tube-particulate accelerator interface edge <NUM>, as shown in <FIG>. The process described above can also occur for the plurality of short auger tubes <NUM>. Specifically, the auger <NUM> can transmit the particulate contained within short auger tube <NUM> towards a short auger tube-particulate accelerator interface edge <NUM>. While the embodiment can utilize an auger, it should be appreciated by those skilled in the art that the disclosure covers other means of transmitting the material through a tube, including but not limited to, hydraulic pistons, pneumatics, and the like.

A gasket <NUM> can provide a seal proximate to the long auger tube-particulate accelerator interface edge <NUM> and the short auger tube-particulate accelerator interface edge <NUM>. The gasket <NUM> can permit the short auger tube <NUM> and long auger tube <NUM> to flex within the particulate accelerators due to movement of the system as the particulate containers <NUM> and <NUM> are emptied, experience vibration, and the like.

In an embodiment best shown in <FIG>, each of the plurality of long auger tubes <NUM> and a plurality of short auger tubes <NUM> can be disposed between two hangars <NUM> affixed to the bottom section <NUM> of the particulate container <NUM>. The hangars <NUM> can be welded to the container, or can be affixed by any means commonly known in the art, including but not limited to, nut and bolt, screws, rivets, soldering, and the like. Extending outwardly along the length of the hangars <NUM> can be two guide surfaces <NUM>. As discussed below, a guide surface <NUM> from adjacent hangars <NUM> can be adapted to receive a long auger tube <NUM> or a short auger tube <NUM>. The hangars <NUM> can include two parallel prongs <NUM> extending outwardly from a front surface of the hangars <NUM>. The prongs <NUM> can be cylindrical or can be of any shape commonly known in the art to engage and/or secure a transmission <NUM>. Further, while two prongs <NUM> are shown in <FIG>, the present disclosure contemplates any number of prongs without deviating from the objects of the disclosure.

<FIG> further illustrates a plurality of particulate handling systems <NUM> at various stages of installation. Beginning below so-called Sector A, two hangars <NUM> can be connected to the bottom surface of the particulate container <NUM>, as discussed above. The hangars <NUM> can be parallel to one another and spaced to provide for installation of a long auger tube <NUM> or short auger tube <NUM>. The long auger tube <NUM> or short auger tube <NUM> can be installed by sliding a lower surface of the input slot <NUM> along guide surfaces <NUM>, one from each of the adjacent hangars <NUM>, as shown illustratively below Sector B. The advantageous design permits for ease of installation as well as removal and reinstallation should a long auger tube <NUM>, short auger tube <NUM> and/or an auger <NUM> needs to be repaired or replaced with the same or different component. As illustrated below Sector C, a shaft <NUM> can be installed over the auger drive shaft <NUM>. The installation of the shaft <NUM> over the auger drive shaft <NUM> can occur either before or after the long auger tube <NUM> or short auger tube <NUM> has been installed between hangars <NUM>. Thereafter, a transmission <NUM> can be oriented such that mounting holes <NUM> are aligned with the prongs <NUM> on the hangars <NUM>, as shown illustratively below Sector D. After installation of the transmission <NUM> on the shaft <NUM>, a pin <NUM> can be installed to rotatably engage auger drive shaft <NUM> and the shaft <NUM>, and a pin <NUM> can be installed to axially secure the shaft <NUM> on auger drive shaft <NUM>, as shown illustratively below Sector E. Further, securing means commonly known in the art can be used to secure the transmission <NUM> to the prongs <NUM>. The installation process described above can be repeated for each row unit along the length of each of the particulate containers <NUM> and <NUM>. The input shaft <NUM> can extend through and engage the plurality of transmission receivers <NUM> in each of the transmissions <NUM>.

Each of the transmissions <NUM> can have a clutch (not shown) in operable communication with a control system. At the direction of the user or based on instruction from the particulate metering system <NUM>, the control system can engage/disengage one or more predetermined clutches in order to activate/deactivate the associated one or more screw conveyors.

As shown illustratively in <FIG>, and more particularly below Sector D, each of the two prongs <NUM> of the one hangar <NUM> can be connected to adjacent transmissions <NUM>. In other words, an upper prong of a hangar can be connected to one gearbox while a lower prong of the same hangar can be connected to an adjacent gearbox. The arrangement is due to an advantageous design of the transmissions <NUM>, which can permit one or more transmissions <NUM> to be removed, inverted and reattached to the same two prongs as previously connected. The inversion of a transmission <NUM> can provide several advantages over the state of the art. First, in an inverted position, one or more of the transmissions <NUM> can be disengaged from the input shaft <NUM> based on the needs of the application (e.g., in at least one instance, where one or more of the rows in the field does not require particulate metering). Second, a second input shaft (not shown) can be implemented and adapted to engage the one or more transmissions <NUM> placed in an inverted position (e.g., in another instance, one or more of the rows can be metered at a different rate). The second input shaft can also extend the length of the particulate container <NUM> and can be parallel to the input shaft <NUM>. In such an embodiment, the user can invert one transmission or can invert multiple transmissions to permit desired groupings of the same (e.g., every four transmissions, every other transmission, etc.) based on the needs of the operation and/or application. Furthermore, together with the same opinion for the companion particulate handling system <NUM> associated with the second particulate container <NUM>, the potential configurations can permit precise control over the blends of the particulate from the containers as well as application rates in which the blends are metered.

In an alternative embodiment, the plurality of long auger tubes <NUM> and the plurality of short auger tubes <NUM> can be secured below the bottom tray <NUM> by an auger tube support beam <NUM> and auger tube couplers <NUM>, as shown illustratively in <FIG>, <FIG>, <FIG> and <FIG>. The auger tube support beam <NUM> can be generally-U shaped with a plurality of cylindrical openings, as shown in <FIG>. The auger tube couplers <NUM> can be substantially ring-shaped with a flange configured to connect to the lower portion <NUM> of particulate container <NUM>, as shown illustratively in <FIG>. In concurrent operation with the particulate delivery system <NUM> can be an air production system <NUM> and an air handling system <NUM>. <FIG>, <FIG> and <FIG> illustrate a blower <NUM> of the air production system <NUM>. The blower <NUM> is driven by a blower motor <NUM>, as shown in <FIG>. In an embodiment, a representative blower can operate at <NUM> Kilowatts (<NUM> horsepower (HP)) and produce a volumetric flow rate of <NUM>-<NUM> cubic meters per second (<NUM>-<NUM> cubic feet per minute (CFM)) per row in operation. The disclosure also contemplates the blower <NUM> operating at variable RPM. In such instances, the blower <NUM> can require less Kilowatts (horsepower) than operating at a constant RPM. Operating the blower <NUM> at a constant RPM or variable RPM can be tailored to the specific demands of the particulate metering system <NUM> in a given application.

Referring to <FIG>, an inlet <NUM> side of an extension <NUM> can be connected to the blower <NUM> at an interface <NUM> to couple the blower <NUM> to the air handling system <NUM>. The interface <NUM> between the blower <NUM> and the extender <NUM> can be flanges on an outlet of the blower <NUM> and an inlet of the extension <NUM> configured to be joined by nuts and bolts, or other means such as pinning, clamping, welding, and the like. The extension <NUM> can be comprised of a plurality of triangular-shaped surfaces <NUM> designed to impart desired flow properties as air enters the air handling system <NUM>. The disclosure envisions alternative characteristics for the extension <NUM>, including but not limited to, a circular cross-section, a nozzle, an expander, and the like. The extension <NUM> can be made of steel, but the disclosure contemplates other materials such as aluminum, polymers, composites, ceramics, and the like. An outlet <NUM> side of the extension <NUM> can have a plate <NUM> with slots <NUM>. The plate <NUM> and slots <NUM> can connect to the coupler <NUM> of the air handling system <NUM>, as shown illustratively in <FIG> and <FIG>.

After exiting the extension <NUM>, the air generated by blower <NUM> can enter a plenum <NUM> of the air handling system <NUM>. Referring to <FIG> and <FIG>, the air handling system <NUM> can be comprised of a plenum <NUM> and a plurality of outlet pipes <NUM>. As shown in <FIG> and <FIG>, the plenum can contain a first side wall <NUM>, second side wall <NUM>, a bottom wall <NUM> and a distal wall <NUM>. The second side wall <NUM> can be opposite the first side wall <NUM>. The first side wall <NUM> and the second side wall <NUM> can contain a plurality of outwardly extending flanges <NUM>. A cover <NUM> can be removably connected to the first side wall <NUM> and the second side wall <NUM>. Referring to <FIG>, the cover <NUM> can have flanges <NUM> extending inferiorly along the length of the cover <NUM>. The flanges <NUM> can have a plurality of gaps <NUM> corresponding to the plurality of outwardly extending flanges <NUM> of the first side wall <NUM> and the second side wall <NUM>. The plurality of gaps <NUM> can engage the plurality of outwardly extending flanges <NUM> to align the cover <NUM> on the plenum <NUM>. An opening <NUM> in the cover <NUM> can allow a user to lock the cover into position on the plenum <NUM>.

A plurality of apertures <NUM> can be disposed within the bottom wall <NUM> of the plenum <NUM>. As shown in <FIG>, the plurality of apertures <NUM> can be arranged in two rows along the length of the plenum <NUM>. The two rows of apertures <NUM> along the length of the plenum <NUM> can be staggered longitudinally, as shown illustratively in <FIG>, <FIG> and <FIG>, to maximize compactness of the particulate accelerators <NUM> disposed below the plenum and/or to impart the desired airflow characteristics. The plurality of apertures <NUM> can be elliptical in shape. The disclosure, however, envisions other arrangements and/or shapes of the plurality of apertures without detracting from the objects of the disclosure. For example, the plurality of apertures <NUM> can be arranged in one row along the length of the plenum <NUM>, or the plurality of apertures <NUM> can be rectangular in shape. The disclosure also contemplates the plurality of apertures disposed the first side wall <NUM>, the second side wall <NUM>, and/or the cover <NUM>.

Referring to <FIG> and <FIG>, the first side wall <NUM> and the second side wall <NUM> can be trapezoidal in shape. In other words, at the edge proximate to the extension <NUM>, the height of the first side wall <NUM> and the second side wall <NUM> is greater than the height of the same proximate to the distal wall <NUM>. The tapering of the plenum <NUM> can maintain the appropriate pressure and airflow characteristics along its length as air exits the plenum <NUM> through the plurality of apertures <NUM>.

A plurality of outlet pipes <NUM> can be connected to the bottom wall <NUM> of the plenum <NUM>. Each of the plurality of outlet pipes <NUM> can be associated with each of the plurality of apertures <NUM>. The outlet pipes <NUM> can be cylindrical in shape, but the disclosure envisions different shapes, including oval, ellipsoid, rectangular, square, and the like. The outlet pipes <NUM> can be secured to the bottom wall <NUM> by means commonly known in the art, including but not limited to, pinning, welding, fastening, clamping, and the like. The outlet pipes <NUM> can be oriented such that an acute angle exists between the major axis of the outlet pipes <NUM> and the bottom wall <NUM> of the plenum <NUM>. The orientation of the outlet pipes <NUM> can impart the appropriate flow characteristics as air transitions from the plenum <NUM> to the particulate accelerator system <NUM>. Based on the orientation of the cylindrical outlet pipes <NUM> relative to the plenum <NUM>, the plurality of apertures <NUM> can be elliptical.

After passing through the plenum <NUM> and outlet pipes <NUM>, air generated by the blower <NUM> can enter a particulate accelerator system <NUM>. As shown in <FIG> and <FIG>, each of the plurality of particulate accelerators <NUM> can connect to each of the plurality of outlet pipes <NUM>.

Referring to <FIG> and <FIG>, each of the plurality of particulate accelerators <NUM> can have an inlet <NUM> and an outlet <NUM>. The inlet <NUM> can connect to one of the plurality of outlet pipes <NUM> of the plenum <NUM> via holes <NUM>. The connection can be through a screw or any other means so as not to significant impede the airflow through the outlet pipe <NUM> and/or the inlet <NUM>. In an embodiment, a locking pin (not shown) engages the holes <NUM> and can provide for quick installation and/or removal of a particulate accelerator <NUM> on the plenum <NUM>, thereby increasing the modularity of the system.

A housing <NUM> can be connected to the inlet <NUM> and/or the outlet <NUM>. The housing <NUM> can be comprised of two halves <NUM> and <NUM> that are secured together through a plurality of clasps <NUM>, as shown in <FIG>. The housing <NUM>, however, can be composed of a single structure. The particulate accelerator <NUM> can be made of steel, but the disclosure contemplates other materials such as aluminum, polymers, composites, ceramics, and the like. An inlet tube <NUM> and/or an outlet tube <NUM> can extend from the housing <NUM>. The housing <NUM> can be integrally formed to the inlet tube <NUM> and/or the outlet tube <NUM>. A plurality of triangular members <NUM> can provide support for the inlet tube <NUM> and/or the outlet tube <NUM>, as shown in <FIG>.

The main body <NUM> of the housing <NUM> can be generally cylindrical in shape. The main body <NUM> can have curved back wall <NUM> comprising an arc from the inlet tube <NUM> to the outlet tube <NUM>. Adjacent to the curved back wall <NUM> can be opposing side walls <NUM>. The opposing side walls <NUM> can be parallel to one another and generally parallel to the direction of airflow through the particulate accelerator <NUM>. Referring to <FIG>, a cylindrical flange <NUM> can extend outwardly and perpendicularly from each of the opposing side walls <NUM>. A cylindrical flange <NUM> can have an outer surface <NUM>, an inner surface <NUM>, and a sloped surface <NUM>. A cylindrical flange <NUM> can have a center opening <NUM>. The sloped surface <NUM> can guide one of the long auger tube-particulate accelerator interface edges <NUM> of the plurality of long auger tubes <NUM> to connect with the inner surface <NUM>. Within a cylindrical flange <NUM> disposed on the opposing side wall <NUM>, a sloped surface <NUM> can guide one of the short auger tube-particulate accelerator interface edges <NUM> of the plurality of short auger tubes <NUM> to connect with an inner surface <NUM>.

As mentioned above, the gasket <NUM> (<FIG>) can provide a seal between the plurality of short and long auger tubes <NUM> and <NUM> and the inner surfaces <NUM> of the particulate accelerators <NUM>. The gasket <NUM> can maintain the seal while permitting flexing of the short auger tube <NUM> and long auger tube <NUM> within the particulate accelerator <NUM> due to movement of the system as the particulate containers <NUM> and <NUM> are emptied, experience vibration, and the like. The distal portions of the long auger tubes <NUM> and the short auger tubes <NUM> can create an interference fit with the gaskets <NUM>. The auger tubes <NUM> and <NUM> can be connected to the cylindrical flanges <NUM> through other means commonly known in the art, including but not limited to, pinning, clamping, fastening, adhesion, and the like. The outward projections of the cylindrical flanges <NUM> can result in gaps <NUM> within the opposing side walls <NUM>, as shown in <FIG>.

The auger <NUM> can transmit the particulate contained within the long auger tube <NUM> towards the long auger tube-particulate accelerator interface edge <NUM>, as shown in <FIG> and <FIG>. Another auger <NUM> can also transmit the particulate contained within the short auger tube <NUM> towards the short auger tube-particulate accelerator interface edge <NUM>. Referring now to <FIG>, particulate from the long auger tube <NUM> can enter the particulate accelerator <NUM> through the center opening <NUM>. The same process involving the short auger tube <NUM> can occur on the opposing side wall <NUM> of the particulate accelerator <NUM>. Upon reaching the interface edges <NUM> and <NUM> of the center openings <NUM>, the particulate mixture can descend vertically within the main body <NUM> due to the force of gravity.

Referring to <FIG>, <FIG> and <FIG>, air can enter a particulate accelerator <NUM> through the inlet <NUM>, inlet tube <NUM>, and inlet transition zone <NUM>. The inlet transition zone <NUM> can be characterized as the point at which air enters the main body <NUM> from the inlet tube <NUM>. Due to the shape of the particulate accelerator <NUM>, particularly the angle <NUM> between the inlet tube <NUM> and the outlet tube <NUM>, the air can track in a flow pattern around the curved back wall <NUM> towards an outlet transition zone <NUM>. In an embodiment, the angle <NUM> between a line <NUM> parallel to the major axis of the inlet tube <NUM> and a line <NUM> parallel to the major axis of the outlet tube <NUM> can be acute, as shown in <FIG>. In another embodiment, the angle <NUM> between the line <NUM> of the inlet tube <NUM> and the line <NUM> of the outlet tube <NUM> can be between thirty and sixty degrees. The disclosure also contemplates that angles <NUM> can be at a right angle or obtuse angle based on the desire flow characteristics through the particulate accelerator <NUM>.

While air is tracking in a flow pattern around the curved back wall <NUM> towards an outlet transition zone <NUM>, the air can mix with the particulate descending vertically in the particulate accelerator <NUM> and can force at least a portion of the particulate mixture through the outlet <NUM>. Any portion of the particulate mixture and air not ejected through the outlet transition zone <NUM> can track in a flow along the curved front wall <NUM> of the main body <NUM>, after which the particulate mixture and air can rejoin subsequent airflow from the inlet <NUM> proximate to the inlet transition zone <NUM>.

Referring to <FIG>, an acute angle <NUM> can exist between the major axis <NUM> of the outlet tube <NUM> and a vertical axis <NUM> bisecting the center opening <NUM> of the cylindrical flange <NUM>. The acute angle <NUM> can result in a greater distance for the particulate to descend vertically prior to contacting a bottom portion of the curved back wall <NUM>. The greater distance can provide for increased time for the air, which can be tracking in a flow pattern around the curved back wall <NUM>, to impart horizontal force on the particulate mixture while in the outlet transition zone <NUM>. Due to the shape of the particulate accelerator <NUM>, the configuration can create a fluid bed to suspend the particulate as the particulate exits the outlet <NUM> and into a discharge tube (not shown). The fluid bed and particulate suspension can reduce the effects of wall friction between the particulate and the discharge tube. In particular, the fluid bed and particulate suspension can counteract the gravitational force on particulate traveling in a generally horizontal tube and can minimize interaction between the particulate and the bottom portion of a tube. The configuration can minimize increased backpressure due to wall friction and/or partial clogging. The fluid bed and particulate suspension can further eliminate complete clogging, resulting in improved particular discharge and overall efficiency of the metering system.

After the particulate mixture exits particulate accelerator <NUM> via air exit outlet <NUM>, the particulate mixture can enter a tube (not shown) connected to the outlet <NUM> via holes <NUM>. Then, the particulate mixture can be metered to a field in any manner commonly known in the art.

Referring to <FIG> and <FIG>, the process described above can simultaneously occur in each particulate accelerator <NUM> disposed along the length of the plenum <NUM>. As shown in <FIG>, for example, the particulate handling system <NUM> can include eighteen short auger tubes <NUM> opposite eighteen long auger tubes <NUM>. The disclosure, however, contemplates that any number of particulate handling subsystems <NUM> and <NUM> can be provided. In an exemplary example, the particulate handling system <NUM> can include thirty-six short auger tubes <NUM> opposite thirty-six long auger tubes <NUM>, each row operated independently. In another exemplary example, the particulate handling system <NUM> can be scaled down to less than eighteen pairs of particulate handling subsystems <NUM> and <NUM> based on the needs of the application.

In the illustrated embodiment of <FIG>, each of the eighteen pairs of auger tubes <NUM> and <NUM> can be separated by a particulate accelerator <NUM> and connected to the air handling system <NUM> and the air production system <NUM>. A first row of particulate handling subsystems <NUM> can receive a first type of particulate from first particulate container <NUM>. A second row of particulate handling subsystems <NUM> can receive a second type of particulate from second particulate container <NUM>. In an embodiment that uses a plurality of auger motors <NUM> connected to a plurality of augers <NUM>, the configuration can permit control of the ratio of first type of particulate to second types of particulate for some or all of the eighteen pairs of particulate handling subsystems <NUM> and <NUM>. In an exemplary embodiment of the dual particulate accelerator system <NUM> discussed below, the configuration can permit control of the ratio of four or more types of particulate for each of the eighteen pairs of particulate handling subsystems <NUM> and <NUM>.

As discussed above, a plurality of moveable and/or controllable gate covers (not shown) can be installed on the plurality of gates <NUM>. The gate covers, when closed, can prevent particulate from filling the short auger tubes <NUM> and/or long auger tubes <NUM>. The configuration can further increase the modularity of the metering system <NUM> by limiting which rows on a field, if any, receive one or more of the types of particulate. The gate covers can be manually and/or automatically opened and closed.

Referring to <FIG> and <FIG>, a dual particulate accelerator system <NUM> is provided. The dual particulate accelerator system <NUM> can include a first particulate accelerator <NUM> and a second particulate accelerator <NUM>. The first particulate accelerator housing <NUM> can be connected to the inlet tube <NUM> and/or the outlet tube <NUM> of the first particulate accelerator <NUM>. A baffle <NUM> can be disposed within the inlet tube <NUM> of the first particulate accelerator <NUM>. The baffle <NUM> can extend from outside the inlet tube <NUM> and into the first particulate accelerator housing <NUM>. The baffle <NUM> can restrict the flow of air through inlet tube <NUM> to impart the desired airflow characteristics in the first particulate accelerator <NUM>. The baffle <NUM> can be placed in the inlet tube <NUM> of the first accelerator <NUM>, or at any point within the flow of air to impart the desired airflow characteristics. The baffle <NUM> can be self-regulating, adjustable and/or controlled by any means commonly known in the art, including but not limited to, mechanical, electrical, electronic, pneumatic, and hydraulic controls.

The first particulate accelerator <NUM> can include an inlet <NUM>, an inlet tube <NUM>, and an outlet tube <NUM>. The first particulate accelerator housing <NUM> can be integrally formed to the inlet tube <NUM> and/or the outlet tube <NUM> of the first particulate accelerator <NUM>. The first particulate accelerator housing <NUM> can be comprised of two halves are secured together through a plurality of clasps and/or engaged holes <NUM>, as shown in <FIG>. The housing <NUM>, however, can be composed of a single structure. The first particulate accelerator <NUM> can be made of steel, but the disclosure contemplates other materials such as aluminum, polymers, composites, ceramics, and the like. A plurality of triangular members <NUM> can provide support for the inlet tube <NUM> and/or the outlet tube <NUM> of the first particulate accelerator <NUM>, as shown in <FIG>.

A first main body <NUM> of the first particulate accelerator housing <NUM> can be generally cylindrical in shape. The first main body <NUM> can have first curved back wall <NUM> comprising an arc from the inlet tube <NUM> to the outlet tube <NUM> of the first particulate accelerator <NUM>. Adjacent to the first curved back wall <NUM> can be opposing side walls <NUM>. The opposing side walls <NUM> can be parallel to one another and generally parallel to the direction of airflow through the first particulate accelerator <NUM>. Referring to <FIG>, a cylindrical flange <NUM> can extend outwardly and perpendicularly from each of the opposing side walls <NUM>. The cylindrical flange <NUM> can have an outer surface, an inner surface <NUM>, and a sloped surface <NUM>. The cylindrical flange <NUM> can have a center opening <NUM>. The sloped surface <NUM> can guide the long auger tube-particulate accelerator interface edges <NUM> of the plurality of long auger tubes <NUM> to connect with the inner surface <NUM>. Within a cylindrical flange <NUM> disposed on the opposing side wall <NUM>, a sloped surface <NUM> can guide the short auger tube-particulate accelerator interface edges <NUM> of the plurality of short auger tubes <NUM> to connect with the inner surface <NUM>. A gasket can provide a seal between the plurality of short and long auger tubes <NUM> and <NUM> and the inner surfaces <NUM> of the first particulate accelerator <NUM>. The gasket can maintain the seal while permitting flexing of the short auger tube <NUM> and long auger tube <NUM> within the first particulate accelerator <NUM> due to movement of the system as the particulate containers <NUM> and <NUM> are emptied, experience vibration, and the like. The distal portions of the long auger tubes <NUM> and the short auger tubes <NUM> can create an interference fit with the gaskets. The auger tubes <NUM> and <NUM> can be connected to the cylindrical flanges <NUM> through other means commonly known in the art, including but not limited to, pinning, clamping, fastenings, adhesion, and the like. The outward projections of the cylindrical flanges <NUM> can result in gaps <NUM> within the opposing side walls <NUM>, as shown in <FIG>.

Likewise, the second particulate accelerator <NUM> can include an inlet tube <NUM>, an outlet tube <NUM>, and an outlet <NUM>. The inlet tube <NUM> of the second particulate accelerator <NUM> can be connected to the outlet tube <NUM> of the first particulate accelerator <NUM> at junction <NUM>.

A second particulate accelerator housing <NUM> can be connected to the inlet tube <NUM> and/or the outlet tube <NUM> of the second particulate accelerator <NUM>. The baffle <NUM> can extend from the outlet tube <NUM> of the first particulate accelerator <NUM>, though junction <NUM>, and into the second particulate accelerator housing <NUM>. The baffle <NUM> can restrict the flow of air through inlet tube <NUM> to impart the desired airflow characteristics in the second particulate accelerator <NUM>. The baffle <NUM> can be placed in the inlet tube <NUM> of the second accelerator <NUM>, or at any point within the flow of air to impart the desired airflow characteristics. The baffle <NUM> can be self-regulating, adjustable and/or controlled by any means commonly known in the art, including but not limited to, mechanical, electrical, electronic, pneumatic, and hydraulic controls. The baffle <NUM> can also be similarly disposed on particulate accelerator <NUM> consistent with the objects of the disclosure.

The second particulate accelerator housing <NUM> can be integrally formed to the inlet tube <NUM> and/or the outlet tube <NUM> of the second particulate accelerator <NUM>. The second particulate accelerator housing <NUM> can be comprised of two halves are secured together through a plurality of clasps and/or engaged holes <NUM>, as shown in <FIG>. The housing <NUM>, however, can be composed of a single structure. The second particulate accelerator <NUM> can be made of steel, but the disclosure contemplates other materials such as aluminum, polymers, composites, ceramics, and the like. A plurality of triangular members <NUM> can provide support for the inlet tube <NUM> and/or the outlet tube <NUM> of the second particulate accelerator <NUM>, as shown in <FIG>.

A second main body <NUM> of the second particulate accelerator housing <NUM> can be generally cylindrical in shape. The second main body <NUM> can have second curved back wall <NUM> comprising an arc from the inlet tube <NUM> to the outlet tube <NUM> of the second particulate accelerator <NUM>. Adjacent to the curved back wall <NUM> can be opposing side walls <NUM>. The opposing side walls <NUM> can be parallel to one another and generally parallel to the direction of airflow through the first particulate accelerator <NUM>. Referring to <FIG>, a cylindrical flange <NUM> can extend outwardly and perpendicularly from the opposing side walls <NUM>. The cylindrical flange <NUM> can have an outer surface, an inner surface <NUM>, and a sloped surface <NUM>. The cylindrical flange <NUM> can have a center opening <NUM>. The sloped surface <NUM> can guide the long auger tube-particulate accelerator interface edges <NUM> of the plurality of long auger tubes <NUM> to connect the inner surface <NUM>. Within a cylindrical flange <NUM> disposed on the opposing side wall <NUM>, a sloped surface <NUM> can guide the short auger tube-particulate accelerator interface edges <NUM> of the plurality of short auger tubes <NUM> to connect with the inner surface <NUM>. A gasket can provide a seal between the plurality of short and long auger tubes <NUM> and <NUM> and the inner surfaces <NUM> of the second particulate accelerator <NUM>. The gasket can maintain the seal while permitting flexing of the short auger tube <NUM> and long auger tube <NUM> within the second particulate accelerator <NUM> due to movement of the system as the particulate containers <NUM> and <NUM> are emptied, experience vibration, and the like. The distal portions of the long auger tubes <NUM> and the short auger tubes <NUM> can create an interference fit with the gaskets. The auger tubes <NUM> and <NUM> can be connected to the cylindrical flanges <NUM> through other means commonly known in the art, including but not limited to, pinning, clamping, fastening, adhesion, and the like. The outward projections of the cylindrical flanges <NUM> can result in gaps <NUM> within the opposing side walls <NUM>, as shown in <FIG>.

An auger <NUM> can transmit the particulate contained within a long auger tube <NUM> towards a long auger tube-particulate accelerator interface edge <NUM>, as shown in <FIG> and <FIG>. Another auger <NUM> can also transmit the particulate contained within a short auger tube <NUM> towards a short auger tube-particulate accelerator interface edge <NUM>. Referring now to <FIG>, particulate from the long auger tube <NUM> can enter the first particulate accelerator <NUM> through the center opening <NUM>. The same process involving the short auger tube <NUM> can occur on the opposing side wall <NUM> of the second particulate accelerator <NUM>. Upon reaching interface edges <NUM> and <NUM> of center opening <NUM>, the particulate mixture, consisting of a controlled ratio of a plurality of particulates, can descend vertically within the first main body <NUM> due to the force of gravity.

The same process can occur in the second particulate accelerator <NUM>. An auger <NUM> can transmit the particulate contained within a long auger tube towards a long auger tube-particulate accelerator interface edge <NUM>, as shown in <FIG> and <FIG>. Another auger <NUM> can also transmit the particulate contained within a short auger tube <NUM> towards a short auger tube-particulate accelerator interface edge <NUM>. The particulate from the long auger tube <NUM> can enter the second particulate accelerator <NUM> through the center opening <NUM>. The same process involving the short auger tube <NUM> can occur on the opposite side wall <NUM> of the second particulate accelerator <NUM>. Upon reaching the interface edges <NUM> and <NUM> of the center opening <NUM>, the particulate mixture, consisting of a controlled ratio of a plurality of particulates, can descend vertically within the second main body <NUM> due to the force of gravity.

Referring to <FIG> and <FIG>, air can enter the first particulate accelerator <NUM> through the inlet <NUM> and the inlet tube <NUM>. Due to the shape of the first particulate accelerator <NUM>, air can track in a flow pattern around the curved back wall <NUM> towards the outlet tube <NUM>. In the process, air can mix with the particulate mixture descending vertically in the first particulate accelerator <NUM> and can force a portion of the particulate mixture through outlet tube <NUM>. Any portion of the particulate mixture and air not ejected through the outlet tube <NUM> of the first particulate accelerator <NUM> can track in a flow along a curved front wall of main body <NUM>, after which the particulate mixture and air can rejoin subsequent airflow from the inlet <NUM>.

The air-particulate mixture exiting the first particulate accelerator <NUM> can enter the inlet tube <NUM> of the second particulate accelerator <NUM>. The air-particulate mixture can track in a flow pattern around the curved back wall <NUM> towards the outlet tube <NUM> and outlet <NUM>. In the process, the air-particulate mixture can further mix with a second particulate mixture descending vertically in the second particulate accelerator <NUM> and can force a portion of the particulate mixture through outlet tube <NUM>. Any portion of the particulate mixture and air not ejected through the outlet tube <NUM> of the second particulate accelerator <NUM> can track in a flow along a curved front wall of main body <NUM>, after which the particulate mixture and air can rejoin subsequent air-particulate mixture from the inlet tube <NUM> of the second particulate accelerator <NUM>.

The air-particulate mixture exiting outlet <NUM> can include a blend of particulates mixed in the first particulate accelerator <NUM> and a blend of particulates mixed in the second particulate accelerator <NUM>. In one embodiment, the process can permit fine control of four types of particulate without sacrificing loss of airflow efficiency. After the particulate mixture and air can enter a tube (not shown) connected to the outlet <NUM>, the particulate mixture can be metered to a field in any manner commonly known in the art. The process described above can simultaneously occur in each dual particulate accelerator system <NUM> disposed along the length of the plenum <NUM>. As shown in <FIG>, for example, the particulate handling system <NUM> can include eighteen short auger tubes <NUM> opposite eighteen long auger tubes <NUM>. Each of the eighteen pairs of auger tubes <NUM> and <NUM> can be separated by a dual particulate accelerator system <NUM> and connected to the air handling system <NUM> and the air production system <NUM>.

The disclosure is not to be limited to the particular embodiments described herein. In particular, the disclosure contemplates numerous variations in the type of ways in which embodiments of the disclosure can be applied to metering systems with variable blend and variable application rate controls for particulate matter. The foregoing description has been presented for purposes of illustration and description. It is not intended to be an exhaustive list or limit any of the disclosure to the precise forms disclosed. It is contemplated that other alternatives or exemplary aspects that are considered included in the disclosure. The description is merely examples of embodiments, processes or methods of the disclosure. It is understood that any other modifications, substitutions, and/or additions can be made. For the foregoing, it can be seen that the disclosure accomplishes at least all of the intended objectives.

Claim 1:
A particulate metering system (<NUM>), the system comprising:
a plurality of particulate accelerators (<NUM>), each comprising:
an air input (<NUM>) receiving an air flow from an air production system (<NUM>);
a plurality of air-particulate interfaces (<NUM>, <NUM>), each of the air-particulate interfaces receiving particulate from a different one of a plurality of particulate containers (<NUM>, <NUM>) via separate operated conveyances (<NUM>);
a particulate-air mixing area comprising a confluence of the air flow from the air input and the particulate from the plurality of air-particulate interfaces; and
an air-particulate output (<NUM>) associated with a separate discharge of a plurality of discharges;
wherein each operated conveyance (<NUM>) is associated with one of the particulate containers (<NUM>, <NUM>) and has a separate discharge at one air-particulate interface of one particulate accelerator;
wherein one or more metering controls (<NUM>) are in operative communication with the plurality of operated conveyances for controlling the amount of one or more types of particulate metered across the plurality of air-particulate interfaces.