Patent Description:
Commodities such as seeds or fertilizers may be conveyed from tanks on a towed cart holding the commodities to distribution points beyond the cart by dosing the commodity into a moving stream of a fluid such as air flowing in a commodity delivery run where the seed, fertilizer, or the like any other commodity may be carried to the remote distribution points coupled with the commodity delivery run. Sometimes it is useful to have more than one commodity, or more than one delivery run, or more than one commodity and more than one delivery run. Run selector devices have been developed to couple commodity tanks with multiple delivery runs so that the delivery run connecting the commodity in the tanks with the distribution points of the commodity runs may be selectable based on factors such as the type of the commodity, the operational characteristics of the delivery run and/or its distribution points, or the like.

One of a commodity delivery run is disclosed in <CIT>, where a distribution head for a pneumatic seed drill is shown, to which seeds are fed from a container by the supply of compressed air.

A further disclosure, <CIT>, discloses a seed hopper with a spring biased bottom valve to open and close seed delivery from a seed delivery run.

Further, <CIT> discloses a metering system for a seeding machine. The metering system includes selectively powered metering sections operable to individually allow or restrict seed dispensation. A damper arrangement is also provided so that pneumatic conveying of the particulate within the machine is consistently maintained when particulate flow is varied between the metering sections.

A pneumatic distribution machine is disclosed in <CIT>, such as a fertilizer spreader or a seed drill. It is proposed for distributing powder or particulate distribution materials. The pneumatic distribution machine comprises a conveying line for the distribution material that can be loaded with an air flow and a plurality of distribution lines for transferring the distribution material to several distribution organs. At least one distribution line is connected to a distribution channel housed in a housing and can be closed by means of a pivoting butterfly valve in the housing in order to interrupt or reduce the distribution material flow through this distribution line as required.

Typical run selector devices are provided as commodity valve devices having an input port, a valve body disposed within a valve housing of the run selector device, and first and second output ports. The valve body is movable such as by pivoting or rotating the valve body between positions relative to the housing for porting the commodity entering the input port to a respective selected output port. The output ports of the run selector device are typically each coupled with respective conduits, and each conduit is in turn coupled with a corresponding different first or second commodity run system or bank. In this way, the movement of the valve body to a first position relative to the valve housing routes the commodity from the single input port to the first run system or bank, and movement of the valve body to a second position relative to the valve housing routes the commodity from the single input port to the second run system or bank.

In addition and for efficiency, multiple such run selector devices are provided for each such commodity tank to increase the volume of commodity distributed from the tank, and control of the multiple devices is typically replicated for their operation in parallel. In that way, a commodity in a tank may be simultaneously distributed through multiple replicated run selector devices that are operated in parallel, so that the commodity may be routed though the multiple run systems for high volume and efficient handling of the commodity. To do this, valve bodies of the multiple run selector devices are coupled together and controlled in parallel by a linkage mechanism that spans the multiple run selector devices to select, simultaneously for each of the run selector devices, either the first set of commodity runs for distribution of the commodity into the first run system or bank or the second set of commodity runs for the distribution into the second run system or bank based on the position of the valve bodies as set by the linkage mechanism spanning the selector devices.

The above system has met with some success because a user need only move a single linkage mechanism such as a drag link or the like to operate the multiple run selector devices in unison, thereby providing a fast and easy way to set up a commodity cart to distribute product from a tank to a selected commodity bank having plural parallel commodity runs. The shared control mechanism offers ease of use in selecting the desired positions of multiple commodity distribution valve devices simultaneously, and it also provides the advantage of applying a basic closure or holding force to each of the valve bodies relative to inner walls of their respective valve housings simultaneously.

However, an obstruction that may occur in only a single valve body in any of the run selector devices that are linked by the shared control mechanism, such as may be caused by the commodity clogging within one of the run selector device housings between an edge of a valve body and an inner wall of a housing of the valve body, may prevent full movement of all of the valve bodies in all of the run selector devices including the other non-obstructed run selector devices by virtue of the control linkage mechanism being coupled between all of the devices. The position of a valve body prevented from movement to full closure against an inner wall of the valve housing by a clog may, in effect, be reproduced or otherwise replicated in all of the other valves that are operated in parallel even though they may not be clogged. The problem presents as an incomplete rotation or a lifting off from the inner walls of the valve devices without the commodity clog. In addition, valve bodies that are not moved completely into designated full travel positions can result in the commodity entering into the non-selected distribution runs, and may also result in an undesirable fluid pressure cross-talk between the selected and the non-selected distribution run systems or banks.

It is therefore desirable to provide commodity run selector device bank control linkage systems and methods having a predetermined amount of backlash provided or otherwise "built-in" between a common drag link coupling the commodity run selector device bank and each of the valve bodies of the run selector devices within the bank so that an obstruction in one or more of the run selector devices of the bank does not adversely affect the full travel or movement of any of the other valve bodies of the other run selector devices without the obstruction.

It is therefore also desirable to provide systems and methods for biasing valve bodies of run selector devices into one or the other opposite position relative to a valve housing of the run selector device to help to seal run selector devices that might otherwise be compromised due to an obstruction of commodity or the like being lodged between an operational edge of the valve body and an inner wall of the valve housing. In that way, each of the individual run selector devices would be able to move independently of the other run selector devices to the desired position in systems using bank control linkage systems and methods having a predetermined amount of backlash.

It is therefore still further desirable to provide commodity run selector device bank control linkage systems and methods having a predetermined amount of backlash provided or otherwise "built-in" between a common drag link coupling the commodity run selector device bank and each of the valve bodies of the run selector devices within the bank, and further to provide systems and methods for biasing valve bodies of run selector devices into one or the other opposite position relative to a valve housing of the run selector device so that an obstruction in one or more of the run selector devices does not adversely affect the full travel or movement of any of the other valve bodies of the other run selector devices, and to help to seal run selector devices that might otherwise be compromised due to an obstruction of commodity or the like being lodged between the operative edge of the valve body and the inner wall of the valve housing.

The embodiments herein provide for new and improved systems and methods for biasing valve body members of valve devices in the form of run selector devices into one or the other opposite position relative to a valve housing of the run selector device to help to fully move the run selector devices into one or the other opposite position relative to a valve housing of the run selector device, and to help to seal an operative edge of a valve body member of a commodity valve with an inner wall of the valve housing. In that way, run selector devices that might otherwise be compromised due to an obstruction of the commodity or the like being lodged between the operative edge of the valve body member and the inner wall of the valve housing of another run selector device may be properly sealed.

The embodiments herein further provide for new and improved commodity run selector device bank control linkage systems and methods having a predetermined amount of backlash provided or otherwise "built-in" between a common drag link coupling the commodity run selector device bank and each of the valve body members of the valve devices in the form of run selector devices within the bank so that an obstruction in one or more of the run selector devices does not adversely affect the full travel or movement of any of the other valve bodies of the other run selector devices.

The embodiments herein still further provide for new and improved commodity run selector device bank control linkage systems and methods having a predetermined amount of backlash provided or otherwise "built-in" between a common drag link coupling the commodity run selector device bank and each of the valve bodies of the valve devices in the form of run selector devices within the bank and, further, new and improved systems and methods for biasing valve bodies of run selector devices into one or the other opposite position relative to a valve housing of the run selector device so that an obstruction in one or more of the run selector devices does not adversely affect the full travel or movement of any of the other valve bodies of the other run selector devices, and to help to seal run selector devices that might otherwise be compromised due to an obstruction of commodity or the like being lodged between the operative edge of the valve body member and the inner wall of the valve housing.

According to the invention as defined in claim <NUM>, a biasing system is provided with an associated run selector device having a valve body member movable within a housing between opposite first and second run selection positions selecting respective first and second commodity distribution runs of the associated run selector device. The biasing system includes a first biasing element on the housing, and a second biasing element on the valve body member. The first and second biasing elements are movable relative to each other between opposite first and second biasing system positions together with the associated valve body member being moved relative to the housing between the opposite first and second run selection positions. The first and second biasing elements are mutually biased against each other to urge each other apart and towards a one or the other of the opposite first and second biasing system positions.

Other embodiments, features and advantages of the example embodiments of a run selector biasing systems will become apparent from the following description of the embodiments, taken together with the accompanying drawings, which illustrate, by way of example, the principles of the example embodiments.

In the accompanying drawings which are incorporated in and constitute a part of the specification, embodiments of the invention are illustrated, which, together with a general description of the invention given above, and the detailed description given below, serve to exemplify the embodiments of this invention.

It should be noted, that the example embodiments illustrated in <FIG>, <FIG>, <FIG>, <FIG>, <FIG>, and <FIG> and the parts of the description referring to said Figures are provided for exemplary reasons and do not form part of the invention.

In the following description reference is made to the accompanying figures which form a part thereof, and in which is shown, by way of illustration, one or more example embodiments of the disclosed valve devices in the form of run selector apparatus and biasing systems for valve devices in the form of run selector apparatus. Various modifications of the example embodiments may be contemplated by one of skill in the art.

As used herein, unless otherwise limited or modified, lists with elements that are separated by conjunctive terms (e.g., "and") and that are also preceded by the phrase "one or more of" or "at least one of" indicate configurations or arrangements that potentially include individual elements of the list, or any combination thereof. For example, "at least one of A, B, and C" or "one or more of A, B, and C" indicates the possibilities of only A, only B, only C, or any combination of two or more of A, B, and C (e.g., A and B; B and C; A and C; or A, B, and C).

Furthermore, in detailing the disclosure, terms of direction, such as "forward," "rear," "front," "back," "lateral," "horizontal," and "vertical" may be used. Such terms are defined, at least in part, with respect to the direction in which the work vehicle or implement travels during use. The term "forward" and the abbreviated term "fore" (and any derivatives and variations) refer to a direction corresponding to the direction of travel of the work vehicle, while the term "aft" (and derivatives and variations) refer to an opposing direction. The term "fore-aft axis" may also reference an axis extending in fore and aft directions. By comparison, the term "lateral axis" may refer to an axis that is perpendicular to the fore-aft axis and extends in a horizontal plane; that is, a plane containing both the fore-aft and lateral axes. The term "vertical," as appearing herein, refers to an axis or a direction orthogonal to the horizontal plane containing the fore-aft and lateral axes.

Referring now to the drawings, wherein the showings are only for the purpose of illustrating the example embodiments only and not for purposes of limiting the same, <FIG> illustrates a work vehicle <NUM> that may be used with the valve devices in the form of run selector apparatus and biasing systems for biasing valve devices in the form of run selector apparatus according to example embodiments of the present disclosure. In the illustrated embodiment, the work vehicle <NUM> may be towed by another vehicle, such as a tractor (not shown), or it may be a self-propelled vehicle. The work vehicle <NUM> may be an air cart or air drill that contains a bulk amount of a commodity, that meters out the commodity from the bulk amount, and that moves the metered commodity away from the work vehicle <NUM> for planting in the ground. In some embodiments, the commodity delivered from the work vehicle <NUM> may be metered further downstream before being planted.

The work vehicle <NUM> shown in <FIG> is merely an example embodiment of an application of the run selector apparatus and biasing systems of the present disclosure. One or more features of the present disclosure may be included on or in a different work vehicle, such as a planter, a commodity cart, or on or in any other type of vehicle or system without departing from the scope of the present disclosure.

A longitudinal axis <NUM> (i.e., primary axis) is indicated in <FIG> for reference purposes. The longitudinal axis <NUM> may be substantially parallel to a direction of travel of the work vehicle <NUM>. Thus, the longitudinal axis <NUM> may be parallel to a fore-aft axis of the work vehicle <NUM>. A lateral axis <NUM> is also indicated in <FIG> into and out from the page as viewed. The lateral axis <NUM> may be perpendicular to the longitudinal axis <NUM> and may extend between opposite lateral sides of the work vehicle <NUM>. Furthermore, a vertical axis <NUM> is indicated in <FIG> for reference purposes.

The work vehicle <NUM> may be configured for delivering the commodity to one or more row units <NUM>. Each row unit <NUM> may include features for respectively tilling the soil, opening a furrow in the soil, depositing the commodity into the furrow, and closing the furrow. In some embodiments, the row units <NUM> may be connected together and arranged in series along the lateral axis <NUM>. Thus, although only one row unit <NUM> is shown in <FIG>, it will be appreciated that similar row units <NUM> may be included and disposed in series along the lateral axis <NUM>. The row units <NUM> may be connected to the work vehicle <NUM> via a rear tow bar <NUM>. The row units <NUM> may also be connected to the towing vehicle (e.g., tractor) via a forward tow bar <NUM>. Accordingly, the row units <NUM> may be disposed between the work vehicle <NUM> and the towing vehicle with respect to the longitudinal axis <NUM>. However, the row units <NUM> may be disposed behind the work vehicle <NUM> in some embodiments and/or the row units <NUM> may be directly connected to the work vehicle <NUM> (i.e., directly connected to the frame of the work vehicle <NUM>) without departing from the scope of the present disclosure.

As shown in <FIG>, the work vehicle <NUM> may include a frame <NUM> (i.e., chassis) and a plurality of wheels <NUM>. The frame <NUM> may be assembled from rigid beams, bars, brackets, or other structures and may support the components described in detail below. The wheels <NUM> may support the frame <NUM> on terrain and enable movement of the vehicle <NUM> across the terrain. As shown, the frame <NUM> may extend between a front end <NUM> and a rear end <NUM> of the work vehicle <NUM>. The tow bar <NUM> may extend from the frame <NUM> at the front end <NUM> for attaching the work vehicle <NUM> to the row units <NUM>.

The work vehicle <NUM> may further include one or more commodity containers <NUM> (tanks, vessels, or other commodity source). The containers <NUM> may be supported on the frame <NUM>. The commodity containers <NUM> may contain seed, fertilizer, and/or another particulate or granular commodity. Additionally, in some embodiments, the containers <NUM> may include a liquid commodity. There may be any number of containers <NUM>. In the illustrated embodiment, for example, there are three commodity containers <NUM>', <NUM>", and <NUM>‴. However, other machine configurations may include four or more commodity containers.

Additionally, the work vehicle <NUM> may include at least one metering system <NUM>. The metering system <NUM> may be a volumetric metering system. The metering system <NUM> may be configured to receive commodity from a commodity container <NUM> and may meter commodity to or into a downstream component. In some embodiments, the metering system <NUM> may be supported by the frame <NUM> and may be disposed generally underneath a commodity container(s) <NUM>. The metering system <NUM> of the work vehicle <NUM> may include a plurality of metering elements (e.g., metering rollers) that actuate to meter out the commodity from a commodity container <NUM>. During operation, particles of the commodity within one of the containers <NUM>', <NUM>", <NUM>‴ may move along the vertical axis <NUM> downwardly toward the metering system <NUM>. The metering system <NUM> may operate to meter out the commodity from one of the containers <NUM>', <NUM>", <NUM>‴ at a controlled rate such as during times when the vehicle <NUM> moves across the field.

The work vehicle <NUM> may also include a delivery system <NUM>. The delivery system <NUM> may include at least one delivery run <NUM>. The delivery run(s) <NUM> may define a fluid pathway for delivery of the commodity away from the work vehicle <NUM>. In some embodiments, a plurality of the runs <NUM> may include a respective one or more run structures <NUM> (i.e., a primary tube or pipe) that is supported below the metering system <NUM>. The run structures <NUM> may be rigid pipe segments that are fixed to the frame <NUM>. The run structures <NUM> may be in fluid communication with downstream components (e.g., downstream pipe segments in the respective delivery run <NUM>, downstream manifolds, and/or the row units <NUM>).

The runs <NUM> may conduct a flow of air from the rear end <NUM> to the front end <NUM> and away from the work vehicle <NUM>. Airflow within the delivery runs <NUM> may be generated by one or more fan(s) or other source(s) (not shown) mounted on the rear end <NUM> of the vehicle <NUM>. The one or more fan(s) or other source(s) provide one or more source(s) of flowing fluid(s) at one or more different pressure(s) as may be necessary and/or desired to carry the one or more different commodities to the row units <NUM>.

Additionally, the delivery runs <NUM> may be operably connected with the metering system <NUM> such that particles of the commodity metered out by the metering system <NUM> may be received by selected ones of the delivery runs <NUM>. In some embodiments, the particles may move substantially vertically downward into the selected delivery runs <NUM>. Once in the delivery runs <NUM>, the air stream therein may propel the metered particles away from the work vehicle <NUM> and toward the row units <NUM>.

In some embodiments, at least one of the delivery runs <NUM> of the delivery system <NUM> may be operably connected with a downstream metering system <NUM>. As shown in <FIG>, the downstream metering system <NUM> may be supported by the row unit <NUM>. It will be appreciated that a plurality of row units <NUM> may include respective downstream metering systems <NUM>. Additionally, in some embodiments, some row units <NUM> may include a respective downstream metering system <NUM> and others may not. In some embodiments, the downstream metering system <NUM> may be a singulating metering system that receives the commodity via one of the delivery runs <NUM> and that meters out singulated particles of the commodity therefrom for planting.

Furthermore, the delivery system <NUM> may include at least one run selector system <NUM>. The run selector system <NUM> may be supported by the frame <NUM> in some embodiments. The run selector system <NUM> may be operably disposed between the metering system <NUM> and two or more of the run structures <NUM>. As will be discussed, the run selector system <NUM> may be configured for selectively changing the pathway for the commodity from a selected container <NUM> through the delivery runs <NUM> by movement of a valve body relative to a valve housing of a commodity valve. For example, the run selector system <NUM> may be used to select a first position of the valve body relative to the run selector valve housing in which commodity metered from the metering system <NUM> moves from the selected commodity container <NUM> via the metering system <NUM> to a first one of the delivery runs <NUM> for delivery to a respective row unit <NUM>. The run selector system <NUM> may further be used to select a second position of the valve body relative to the run selector valve housing in which commodity metered from the metering system <NUM> moves from the selected commodity container <NUM> via the metering system <NUM> to a second one of the delivery runs <NUM> for delivery to a different row unit <NUM>.

In some embodiments, one or more actuators such as for example a set of electric motors, drag link arms, multiple connected levers (not shown), or the like may be included for the run selector system <NUM> to be moved by operator or other control between the different positions to select between the different pathways for the commodity through the delivery system <NUM> by moving the valve body relate to the valve housing thereby controlling the flow of the commodity to the selected delivery run.

<FIG> and <FIG> schematically illustrate a run selector apparatus <NUM> of the run selector system <NUM> described above provided in accordance with an example embodiment. It is to be appreciated that the run selector system <NUM> may include a plurality of the run selector apparatus <NUM> as shown. The run selector apparatus <NUM> is illustrated in combination with a metering system <NUM> of the type described in general above wherein, in the example illustrated, the run selector apparatus <NUM> is provide together with the metering system <NUM> as an integrated unit. The run selector apparatus <NUM> is shown in a first operative position in <FIG> and in a second operative position in <FIG>. The run selector apparatus <NUM> includes a valve housing <NUM> having an input port <NUM> and first and second output ports <NUM>, <NUM>, and a valve member <NUM> disposed in the valve housing <NUM>. The valve member <NUM> of the example embodiment includes a valve body member <NUM> moveable between opposite first (<FIG>) and second (<FIG>) run selection positions relative to the valve housing <NUM>. The valve body member <NUM> is in the form of a flapper valve body member in the example embodiment. That is, the valve body member has an overall substantially planar conformation and is shown in the drawing figures on an end view thereof wherein a general plane defined by the valve body member is perpendicular to the page in the illustration. However, it is to be appreciated that the valve body member <NUM> may take on any equivalent form including for example valve bodies having other shapes and/or configurations and bodies that are rotatable and/or slideable relative to the valve housing <NUM> for selecting delivery of the commodity to either of the first or second output ports <NUM>, <NUM>.

In the example embodiment the valve member <NUM> is pivotable about a pivot axis <NUM> that extends out of the page as viewed in the Figures. The pivotal motion of the valve member <NUM> may be operated by a control arm member(not shown in <FIG>, <FIG>), wherein the control arm member may be formed integrally with the valve body member <NUM> or may be formed separately and then selectively attached with the valve body member <NUM>. In this regard, the valve member <NUM> of the example embodiment shown in <FIG> and <FIG> includes a keyed surface conformation <NUM> (<FIG>, <FIG>) defined by a portion of the valve member <NUM> near the pivot axis <NUM>. In the example embodiment, the keyed surface conformation <NUM> is coextensive with the pivot axis <NUM> and may be used as an interface for attachment of a suitable control arm member or the like to the valve body member <NUM>.

When the valve member <NUM> is disposed in the first run selection position relative to the valve housing <NUM> such as shown in <FIG>, the run selector apparatus <NUM> defines a first fluid circuit <NUM> that includes the input port <NUM> opened to the first output port <NUM> and closed to the second output port <NUM>. When the valve member <NUM> is disposed in the second run selection position relative to the valve housing <NUM> such as shown in <FIG>, the run selector apparatus <NUM> defines a second fluid circuit <NUM> that includes the input port <NUM> closed to the first output port <NUM> and opened to the second output port <NUM>.

As described above, the run selector apparatus <NUM> includes a valve housing <NUM> containing the valve member <NUM>. In the example embodiment, the valve housing <NUM> defines a housing body <NUM> defining an input port <NUM> downstream of the metering system <NUM> for conducting an input fluid flow <NUM> into the housing body via the input port <NUM>, a first output port <NUM> in selective fluid communication based on the position of the valve member <NUM> with the input port <NUM> for conducting the input fluid flow <NUM> out of the housing body <NUM> as a first output fluid flow <NUM>, and a second output port <NUM> in selective fluid communication based on the position of the valve member <NUM> with the input port <NUM> for conducting the input fluid flow <NUM> out of the housing body <NUM> as a second output fluid flow <NUM>.

In the example embodiment, the input fluid flow <NUM> and the first output fluid flow <NUM> generally follow the first fluid circuit <NUM> for the valve member <NUM> disposed in the first position shown in <FIG>. Similarly in the example embodiment, the input fluid flow <NUM> and the second output fluid flow <NUM> generally follow the second fluid circuit <NUM> for the valve member <NUM> disposed in the second position shown in <FIG>.

The run selector system <NUM> of <FIG> is shown from a different perspective and in greater detail in <FIG> and <FIG>. As shown, the run selector system <NUM> of the example embodiment includes a set of upper metering systems 130a-<NUM> coupled below with a corresponding set of run selector apparatus 200a-<NUM>. Each of the run selector apparatus 200a-<NUM> is formed substantially identically as shown in <FIG> and <FIG>, for example, and each is arranged on the associated work vehicle <NUM> in parallel and generally in a line extending along the lateral axis <NUM> (<FIG>). Arranged in that manner, the operation of the bank of run selector apparatus 200a-<NUM> to control the flow of commodity product therethrough may be collectively controlled in unison by the position of an elongate drag link <NUM> operatively coupled with crank arm members 320a-<NUM> that are in turn operatively coupled with the valve members <NUM> (<FIG> and <FIG>) of the run selector apparatus.

The drag link <NUM> may be moved rightwardly (as viewed in the Figure) by an operator or the like pulling on a handle <NUM> to the position as shown for example in <FIG> to simultaneously operate each of the crank arm members 320a-<NUM> clockwise as viewed in the Figure. The crank arm members 320a-<NUM> are pivotable about a corresponding set of pivot axes (not shown) best illustrated in <FIG> and <FIG> defined by the valve members <NUM> of the run selector apparatus. In an example embodiment the crank arm members 320a-<NUM> are formed separately from the valve members <NUM> of the run selector apparatus so that they may be detached or otherwise removed from the valve members <NUM> for purposes such as for servicing the system or the like and, in a further example embodiment they are formed integrally with the valve members <NUM> of the run selector apparatus. Free ends of each of the crank arm members 320a-<NUM> are pivotally coupled with the drag link <NUM> at pivot joints 330a-<NUM> so that movement of the drag link <NUM> to the right as viewed in <FIG> causes the crank arm members 320a-<NUM> to rotate clockwise in turn pivoting the valve members <NUM> of each of the run selector apparatus 200a-<NUM> to the first position such as shown in <FIG> for example thereby configuring each of the run selector apparatus 200a-<NUM> to establish the first fluid circuit <NUM> (<FIG>) that includes the input port <NUM> (<FIG> and <FIG>) opened to the first output port <NUM> (<FIG> and <FIG>) and closed to the second output port <NUM> (<FIG> and <FIG>).

Similarly, movement of the drag link <NUM> to the left as viewed in <FIG> causes the crank arm members 320a-<NUM> to rotate counterclockwise in turn pivoting the valve members <NUM> of each of the run selector apparatus 200a-<NUM> to the second position such as shown in <FIG> for example thereby configuring each of the run selector apparatus 200a-<NUM> to establish the second fluid circuit <NUM> (<FIG>) that includes the input port <NUM> (<FIG> and <FIG>) closed to the first output port <NUM> (<FIG> and <FIG>) and opened to the second output port <NUM> (<FIG> and <FIG>).

In one example embodiment of the run selector system <NUM>, the pivot joints 330a-<NUM> may include precision mechanical pivot joints comprising pins, bolts, bushings, bearings or the like, wherein the precision mechanical pivot joints provide little or minimal backlash. For example, in an example embodiments, the free ends of the crank arm members 320a-<NUM> may carry pin members that extend through bushings provided in the drag link <NUM> so that the crank arm members 320a-<NUM> of each of the run selector apparatus may be simultaneously moved to substantially identical orientations relative to the run selector apparatus as controlled by this mechanical connection. In this embodiment backlash tolerance for permitting incomplete travel to either of the positions shown in <FIG> and <FIG> of one or more of the run selector apparatus 200a-<NUM> to accommodate a clog such as debris lodged between the valve body member and the run selector housing, and biasing for urging the others of the one or more of the run selector apparatus 200a-<NUM> that are not clogged to complete the full travel to either of the fully operated positions shown in <FIG> and <FIG> may be provided by a structure of the valve body member bodies in a manner to be described in greater detail below with reference to <FIG> and <FIG>. Alternatively the backlash tolerance may be provided in accordance with an example embodiment at the connection between the crank arm members 320a-<NUM> and the valve body members in a manner also to be described in greater detail below with reference to <FIG>.

In a further embodiment of the run selector system <NUM>, the pivot areas 330a-<NUM> may include compensating pivot joint systems <NUM> as shown in <FIG> for permitting incomplete travel to either of the positions shown in <FIG> and <FIG> of one or more of the run selector apparatus 200a-<NUM>. In that way, the example embodiment provides commodity run selector device bank control linkage systems and methods having a predetermined amount of backlash that is formed or otherwise "built-in" between a common drag link coupling the commodity run selector device bank and each of the valve bodies of the run selector devices within the bank so that an obstruction in one or more of the run selector devices of the bank does not adversely affect the full travel or movement of any of the other valve bodies of the other run selector devices without the obstruction. The built-in backlash may be provided in the drag link member, in a portion of a control arms coupled with the valve body members, or both or elsewhere as needed or desired.

The example embodiment biases valve bodies of run selector devices into one or the other opposite position relative to a valve housing of the run selector device to help to seal run selector devices that might otherwise be compromised due to an obstruction of commodity or the like being lodged between an operational edge of the valve body and an inner wall of the valve housing. In that way, each of the individual run selector devices would be able to move independently of the other run selector devices to the desired position in systems using bank control linkage systems and methods having a predetermined amount of backlash.

The joint system <NUM> accommodates clogs such as debris lodged between the valve body member and the run selector housing, while also biasing for urging the others of the run selector apparatus 200a-<NUM> that are not clogged with debris to complete the full travel to either of the fully operated positions shown in <FIG> and <FIG>. In this regard, <FIG> show a run selector system <NUM>' including a compensating pivot joint system <NUM> in accordance with a further example embodiment. <FIG> shows the compensating system <NUM> of <FIG> with selected connecting hardware removed for ease of explanation, and <FIG> shows a drag link component <NUM>' of the selector system including the compensating pivot joint system <NUM> of <FIG>.

In an example, not according to the invention, of the run selector system <NUM>', rather than the pivot joints 330a-<NUM> including precision mechanical pivot joints as described above comprising pins, bolts, bushings, bearings or the like, wherein the precision mechanical pivot joints provide little or minimal backlash, the run selector system <NUM>' of the embodiment illustrated in <FIG> has a predetermined amount of backlash provided or otherwise "built-in" between a common drag link <NUM>' coupling the commodity run selector device bank and each of the valve bodies of the run selector devices within the bank so that an obstruction in one or more of the run selector devices does not adversely affect the full travel or movement of any of the other valve bodies of the other run selector devices without the obstruction.

A run selector system <NUM>' including a compensating pivot joint system <NUM> representative of a compensating pivot joint of the pivot areas is shown and described with reference to <FIG>. The compensating pivot joint system <NUM> in accordance with the example embodiment of the run selector system <NUM>' includes an interface device <NUM> for enabling selective controlled movement between the valve body of the run selector apparatus and a control arm <NUM> operatively coupled with the valve body, wherein, the control arm <NUM> in the example embodiment comprises portions of the drag link <NUM>' in combination with levers of the run selector apparatus <NUM> of the type described above.

With reference to <FIG> and with additional reference again to <FIG> and <FIG>, a run selector system <NUM>' in accordance with the further example, not according to the invention, includes a run selector apparatus <NUM> of the type described above including a valve housing <NUM> having an input port <NUM> (<FIG>, <FIG>) and first and second output ports <NUM>, <NUM> (<FIG>, <FIG>), and a valve member <NUM> (<FIG>, <FIG>) disposed in the valve housing <NUM>, and further including an interface device <NUM>, and a control arm member <NUM> operatively coupled with the valve member <NUM> by the interface device <NUM> for moving the valve member <NUM> between first (<FIG>) and second (<FIG>) run selection positions relative to the housing. The control arm member <NUM> may comprise, for example, a modified version <NUM>' of the drag link <NUM> (<FIG>, <FIG>) including slotted openings <NUM> (<FIG>) adapted to accommodate the interface device <NUM> of the example embodiment for permitting incomplete travel to either of the positions shown in <FIG> and <FIG> of one or more of the run selector apparatus 200a-<NUM> to accommodate a clog such as debris lodged between the valve body member and the run selector housing, while also biasing for urging the others of the run selector apparatus 200a-<NUM> that are not clogged with debris to complete the full travel to either of the fully operated positions shown in <FIG> and <FIG>.

As described with reference to <FIG> and <FIG>, the valve member <NUM> comprises a valve body member <NUM> moveable between opposite first and second run selection positions relative to the housing. The valve body member disposed in the first run selection position relative to the housing <NUM> defines a first fluid circuit <NUM> comprising the input port <NUM> opened to the first output port <NUM> and closed to the second output port <NUM>, and the valve body member <NUM> disposed in the second run selection position relative to the housing <NUM> defines a second fluid circuit <NUM> comprising the input port <NUM> closed to the first output port <NUM> and opened to the second output port <NUM>.

In the example, not according to the invention, the control arm member <NUM> in the form of a modified drag link <NUM> of the type described above is movable between opposite first (<FIG>) and second (<FIG>) control arm positions corresponding respectively to the first and second run selection positions of the valve member <NUM>. In the example embodiment, the interface device <NUM> includes a first interface element <NUM> on the valve member <NUM>, a second interface element <NUM> on the control arm member <NUM>, and a resilient member <NUM> disposed between the first and second interface elements <NUM>, <NUM>. In the example embodiment, the resilient member <NUM> defines an opening configured to receive the first interface element <NUM> on the valve member <NUM> to permit limited free movement of the interface element <NUM> relative to the slotted openings <NUM> of control arm member <NUM> portions of the drag link <NUM>'. In the example embodiment, the resilient member <NUM> is preferably made of a material that is compressible between the first and second interface elements <NUM>, <NUM> to permit limited relative limited biased movement between the control arm member <NUM> and the valve member <NUM> for other portions of travel between the interface element <NUM> on the valve member <NUM> and the control arm member <NUM>. The compressibility of the resilient member permits one or more of the run selector apparatus 200a-<NUM> to accommodate a clog such as debris lodged between the valve body member and the run selector housing, while biasing others of the run selector apparatus 200a-<NUM> that are not clogged with debris to one or the other of the fully operated positions. In this embodiment, the reduced travel of the valve body of the commodity valve that is clogged is absorbed by a compression of the resilient member <NUM> of the compensating pivot joint system <NUM>. In this embodiment, the reduced travel of the valve body of the commodity valve that is clogged is further absorbed by the predetermined amount of backlash provided or otherwise "built-in" by the slotted openings <NUM> between the common drag link <NUM>' coupling the commodity run selector device bank and each of the valve bodies of the run selector devices.

In a particular example embodiment of the run selector apparatus <NUM>', the control arm member <NUM> comprises the drag link member <NUM>' operatively coupled with an associated run selection system including for example the handle <NUM>' and/or other mechanisms or means for actuating the drag link member <NUM>'. Also in the particular example embodiment, the resilient member <NUM> is disposed between the first and second interface elements <NUM>, <NUM> and is compressible between the first and second interface elements <NUM>, <NUM> to permit limited relative movement between the elongate crank portion of the valve body member and the drag link member even at the end of travel within the slotted openings <NUM> of the drag link member <NUM>'.

With reference to <FIG> and with additional reference again to <FIG> and <FIG>, a run selector system <NUM>" in accordance with a further example, not according to the invention, includes a run selector apparatus <NUM> of the type described above including a valve housing <NUM> having an input port <NUM> (<FIG>, <FIG>) and first and second output ports <NUM>, <NUM> (<FIG>, <FIG>), and a valve member <NUM> (<FIG>, <FIG>) disposed in the valve housing <NUM>, and further including an interface device <NUM>, and a control arm member <NUM> operatively coupled with the valve member <NUM> by the interface device <NUM> for moving the valve member <NUM> between first (<FIG>) and second (<FIG>) run selection positions relative to the housing.

As described with reference to <FIG> and <FIG>, the valve member <NUM> comprises a valve body member <NUM> moveable between opposite first and second run selection positions relative to the housing. The valve body member disposed in the first run selection position relative to the housing defines a first fluid circuit <NUM>(<FIG>) comprising the input port <NUM> opened to the first output port <NUM> and closed to the second output port <NUM>, and the valve body member disposed in the second run selection position relative to the housing defines a second fluid circuit <NUM> (<FIG>) comprising the input port <NUM> closed to the first output port <NUM> and opened to the second output port <NUM>.

In the example embodiment, the control arm member <NUM> is movable between opposite first (<FIG>) and second (<FIG>) control arm positions corresponding respectively to the first and second run selection positions of the valve member <NUM>. In the example embodiment, the interface device <NUM> includes a first interface element <NUM> on the valve member <NUM>, a second interface element <NUM> on the control arm member <NUM>, and a resilient member <NUM> disposed between the first and second interface elements <NUM>, <NUM>. In the example embodiment, the resilient member <NUM> defines a star shaped member having a plurality of radially extending arm members <NUM> defining a plurality of radially extending slots <NUM> between the plurality of radially extending arm members <NUM>. Each of the first and second interface elements <NUM>, <NUM> define a plurality of circumferentially spaced apart axially extending bosses <NUM>, <NUM> configured to extend into the plurality of radially extending slots <NUM>. A width of each of the spaced apart axially extending bossed <NUM>, <NUM> in a circumferential direction is in the example embodiment less than a width of the plurality of radially extending slots <NUM> in the circumferential direction to permit limited free movement of the interface element <NUM> relative to the control arm member <NUM>. In the assembled disposition of the run selector system <NUM>" in accordance with the example embodiment, the axially extending bossed <NUM>, <NUM> are interdigitatedly received in the plurality of radially extending slots <NUM>. In addition, the resilient member <NUM> is preferably made of a material that is compressible between the first and second interface elements <NUM>, <NUM> to permit limited relative limited biased movement between the control arm member <NUM> and the valve member <NUM> for other portions of travel between the interface element <NUM> on the valve member <NUM> and the control arm member <NUM>. The compressibility of the resilient member permits one or more of the run selector apparatus 200a-<NUM> to accommodate a clog such as debris lodged between the valve body member and the run selector housing, while biasing others of the run selector apparatus 200a-<NUM> that are not clogged with debris to one or the other of the fully operated positions.

<FIG> illustrate a biasing system <NUM> associated with an run selector device <NUM> of the type shown in <FIG> and <FIG> having a valve member <NUM> movable within a valve housing <NUM> between opposite first (<FIG>) and second (<FIG>) run selection positions selecting respective first and second commodity distribution runs of the associated run selector device. The biasing system <NUM> according to the invention includes a first biasing element <NUM> on or otherwise coupled with the valve housing <NUM> of the associated run selector device <NUM>, and a second biasing element <NUM> on or otherwise coupled with the valve member <NUM> of the associated run selector device <NUM>. The second biasing element <NUM> may be carried on the valve member <NUM> such as by mutual engagement between a keyway <NUM> defined on one end of the first biasing element and the corresponding keyed surface conformation <NUM> (<FIG>, <FIG>) defined by the valve member <NUM>. As shown, the first and second biasing elements <NUM>, <NUM> are movable relative to each other between opposite first and second biasing system positions together with the associated valve member <NUM> being moved relative to the housing <NUM> between the opposite first and second run selection positions by the mutual engagement between the keyed surface conformation <NUM> and the keyway <NUM>. The first and second biasing elements <NUM>, <NUM> are mutually biased against each other to urge each other apart and towards a one or the other of the opposite first and second biasing system positions.

According to the invention, the first biasing element <NUM> is a bendable resilient member <NUM> on or otherwise coupled with the valve housing <NUM> of the associated run selector device <NUM>, and the second biasing element is an engagement surface <NUM> defined on or by the second biasing element <NUM>. In the example embodiment the bendable resilient member <NUM> and the engagement surface <NUM> are mutually biased against each other to urge each other towards a one or the other of the opposite first and second biasing system positions thereby urging the valve member <NUM> of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions.

In addition to the above, not according to the invention, the first biasing element <NUM> is a bendable resilient member <NUM> in the form of a spring member <NUM> coupled with the valve housing <NUM> of the associated run selector device, and the second biasing element <NUM> is a cam element <NUM> on or otherwise coupled with the valve member <NUM> of the associated run selector device. According to the invention, the spring member <NUM> and the cam element <NUM> are mutually biased against each other to urge each other towards a one or the other of the opposite first and second biasing system positions thereby urging the valve body member <NUM> of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions. In a further example embodiment, the cam element <NUM> may be provided as a separate part rotatably coupled with a shaft of the valve member located on the valve member on the opposite side from the selector arm.

In accordance with selected example, not according to the invention, herein, therefore, a biasing method is provided for use with an associated run selector device having a valve member movable within a housing between opposite first and second run selection positions selecting respective first and second commodity distribution runs of the associated run selector device. The biasing method may comprise providing a first biasing element on the housing of the associated run selector device, providing a second biasing element on the valve member of the associated run selector device, and mutually biasing the first and second biasing elements against each other to urge each other apart, wherein the first and second biasing elements are movable relative to each other between opposite first and second biasing system positions together with the associated valve member being moved relative to the housing between the opposite first and second run selection positions, and wherein the first and second biasing elements mutually biased against each other urge each other apart and towards a one or the other of the opposite first and second biasing system positions. The providing a first one of the first and second biasing elements may comprise providing a bendable resilient member, and the providing the other one of the first and second biasing elements may comprise providing an engagement surface, wherein the bendable resilient member and the engagement surface are mutually biased against each other to urge each other towards a one or the other of the opposite first and second biasing system positions thereby urging the associated valve member towards a corresponding one or the other of the opposite first and second run selection positions.

<FIG> illustrate a further biasing system <NUM>, not according to the invention, and components therefor for use with an associated run selector device <NUM> of the type shown in <FIG> and <FIG> having a valve member <NUM> movable within a valve housing <NUM> between opposite first (<FIG>) and second (<FIG>) run selection positions selecting respective first and second commodity distribution runs of the associated run selector device. The biasing system <NUM> of the example embodiment includes a first biasing element <NUM> on or otherwise coupled with the valve housing <NUM> of the associated run selector device <NUM>, and a second biasing element <NUM> on or otherwise coupled with the valve member <NUM> of the associated run selector device <NUM>. The second biasing element <NUM> may be carried on the valve member <NUM> such as by mutual engagement between a keyway <NUM> (<FIG>) defined on one end of the first biasing element <NUM> and the corresponding keyed surface conformation <NUM> (<FIG>, <FIG>) defined by the valve member <NUM>. As shown, the first and second biasing elements <NUM>, <NUM> are movable relative to each other between opposite first and second biasing system positions together with the associated valve member <NUM> being moved relative to the housing <NUM> between the opposite first and second run selection positions by the mutual engagement between the keyed surface conformation <NUM> and the keyway <NUM> (<FIG>). The first and second biasing elements <NUM>, <NUM> are mutually biased against each other to urge each other apart and towards a one or the other of the opposite first and second biasing system positions.

In a particular example, not according to the invention, the first biasing element <NUM> is an engagement surface <NUM> defined on or by the or otherwise coupled with the valve housing <NUM> of the associated run selector device <NUM>, and the second biasing element <NUM> is a bendable resilient member <NUM> such as for example a spring. In the example embodiment the bendable resilient member <NUM> and the engagement surface <NUM> are mutually biased against each other to urge each other towards a one or the other of the opposite first and second biasing system positions thereby urging the valve member <NUM> of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions.

In addition to the above, in the particular example, not according to the invention, the first biasing element <NUM> is a raceway <NUM> coupled with the valve housing <NUM> of the associated run selector device, and the second biasing element <NUM> is a spring member <NUM> on or otherwise coupled with the valve member <NUM> of the associated run selector device. In the embodiment, the spring member <NUM> and the raceway <NUM> are mutually biased against each other to urge each other towards a one or the other of the opposite first and second biasing system positions thereby urging the valve body member of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions.

<FIG> illustrates a further biasing system <NUM> not according to the invention, for use with an associated run selector device <NUM> of the type shown in <FIG> and <FIG> having a valve member <NUM> movable within a valve housing <NUM> between opposite first (<FIG>) and second (<FIG>) run selection positions selecting respective first and second commodity distribution runs of the associated run selector device. The biasing system <NUM> of the example embodiment includes a first biasing element <NUM> on or otherwise coupled with the valve housing <NUM> of the associated run selector device <NUM>, and a second biasing element <NUM> on or otherwise coupled with the valve member <NUM> of the associated run selector device <NUM>. The second biasing element <NUM> may be carried on the valve member <NUM> such as by mutual engagement between a keyway <NUM> (<FIG>) defined on one end of the first biasing element and the corresponding keyed surface conformation <NUM> (<FIG>, <FIG>) defined by the valve member <NUM>. As shown, the first and second biasing elements <NUM>, <NUM> are movable relative to each other between opposite first and second biasing system positions together with the associated valve member <NUM> being moved relative to the valve housing <NUM> between the opposite first and second run selection positions by the mutual engagement between the keyed surface conformation <NUM> and the keyway <NUM>. The first and second biasing elements <NUM>, <NUM> are mutually biased against each other to urge each other apart and towards a one or the other of the opposite first and second biasing system positions.

It is to be appreciated in the example, not according to the invention, that one or both of the first and second biasing elements <NUM>, <NUM> may comprise a compression spring assembly <NUM> disposed in compression between the first and second biasing elements <NUM>, <NUM>. In the example embodiment illustrated, however, the first biasing element <NUM> comprises a first fastening member <NUM> on the valve housing <NUM> of the associated run selector device <NUM>, wherein the first fastening member <NUM> is pivotally connected with a first end <NUM> of the compression spring assembly <NUM>. Also in the embodiment illustrated, the second biasing element <NUM> comprises a second fastening member <NUM> on the valve member <NUM> of the associated run selector device <NUM>, wherein the second fastening member <NUM> is pivotally connected with a second end <NUM> of the compression spring assembly <NUM>. It is to be appreciated that the compression spring assembly <NUM> of the biasing system <NUM> of the example embodiment biases the first and second biasing elements <NUM>, <NUM> mutually against each other to urge the first and second biasing elements <NUM>, <NUM> towards a one or the other of the opposite first and second biasing system positions thereby urging the valve body member of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions.

<FIG> illustrates a further biasing system <NUM> for use with an associated run selector device <NUM> of the type shown in <FIG> and <FIG> having a valve member <NUM> movable within a valve housing <NUM> between opposite first (<FIG>) and second (<FIG>) run selection positions selecting respective first and second commodity distribution runs of the associated run selector device. The biasing system <NUM> of the example embodiment includes a first biasing element <NUM> on or otherwise coupled with the valve housing <NUM> of the associated run selector device <NUM>, and a second biasing element <NUM> on or otherwise coupled with the valve member <NUM> of the associated run selector device <NUM>. The second biasing element <NUM> may be carried on the valve member <NUM> such as by mutual engagement between a keyway <NUM> (<FIG>) defined on one end of the first biasing element and the corresponding keyed surface conformation <NUM> (<FIG>, <FIG>) defined by the valve member <NUM>. As shown, the first and second biasing elements <NUM>, <NUM> are movable relative to each other between opposite first and second biasing system positions together with the associated valve member <NUM> being moved relative to the housing between the opposite first and second run selection positions by the mutual engagement between the keyed surface conformation <NUM> and the keyway <NUM>. The first and second biasing elements <NUM>, <NUM> are mutually biased against each other to urge each other apart and towards a one or the other of the opposite first and second biasing system positions.

In the example embodiment of the further biasing system <NUM> illustrated in <FIG>, a first one of the first and second biasing elements <NUM>, <NUM> comprises a compression spring assembly <NUM> disposed in compression between the first and second biasing elements <NUM>, <NUM>. The compression spring assembly <NUM> of the example embodiment comprises a compression spring member <NUM> having opposite first <NUM> and second <NUM> ends, and a raceway block <NUM> operatively coupled with the second end <NUM> of the compression spring member <NUM>. The first one of the first and second biasing elements <NUM>, <NUM> comprises a fastening member <NUM> operatively coupling the first end <NUM> of the compression spring member <NUM> with the valve housing <NUM> of the associated run selector device <NUM>. The other one of the first and second biasing elements <NUM>, <NUM> comprises a cam member <NUM> having a cam surface <NUM> configured to engage the raceway block <NUM> of the compression spring assembly <NUM>.

In the example embodiment of the further biasing system <NUM> illustrated in <FIG>, engagement between the raceway block <NUM> of the compression spring assembly <NUM> and the cam surface <NUM> of the cam member biases the first and second biasing elements <NUM>, <NUM> mutually against each other to urge the first and second biasing elements towards a one or the other of the opposite first and second biasing system positions thereby urging the valve body member of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions.

<FIG> and <FIG> illustrate a biasing system <NUM>, not according to the invention, for use with an associated run selector device <NUM> of the type shown in <FIG> and <FIG> having a valve member <NUM> movable within a valve housing <NUM> between opposite first (<FIG>) and second (<FIG>) run selection positions selecting respective first and second commodity distribution runs of the associated run selector device. The biasing system <NUM> of the example embodiment includes a first biasing element <NUM> on or otherwise coupled with the valve housing <NUM> of the associated run selector device <NUM>, and a second biasing element <NUM> on or otherwise coupled with the valve member <NUM> of the associated run selector device <NUM>. The second biasing element <NUM> may be carried on the valve member <NUM> such as by mutual engagement between a keyway <NUM> (<FIG>) defined on one end of the first biasing element and the corresponding keyed surface conformation <NUM> (<FIG>, <FIG>) defined by the valve member <NUM>. As shown, the first and second biasing elements <NUM>, <NUM> are movable relative to each other between opposite first and second biasing system positions together with the associated valve member <NUM> being moved relative to the housing <NUM> between the opposite first and second run selection positions by the mutual engagement between the keyed surface conformation <NUM> and the keyway <NUM>. The first and second biasing elements <NUM>, <NUM> are mutually biased against each other to urge each other apart and towards a one or the other of the opposite first and second biasing system positions.

In the example, not according to the invention, shown in <FIG> and <FIG>, the first biasing element <NUM> comprises a first contoured surface <NUM> defined on the housing of the associated run selector device, wherein the first contoured surface <NUM> defines a first pattern <NUM> on the housing of the associated run selector device. In addition, second biasing element <NUM> comprises a spring system <NUM> rotatably carried with the valve body member <NUM> of the associated run selector device for movement relative to the housing <NUM> of the associated run selector device, wherein the spring system <NUM> comprises a wave spring <NUM> disposed in compression between opposite first and second end members <NUM>, <NUM>. The first end member <NUM> of the spring system <NUM> defines a second contoured surface <NUM> having a second pattern <NUM>, the first and second contoured surfaces <NUM>, <NUM> being configured to engage each other, and the first and second patterns <NUM>, <NUM> are substantially opposite to each other.

In the example, not according to the invention, the first and second contoured surfaces <NUM>, <NUM> are biased against each other by the wave spring <NUM> disposed in compression to urge the first and second biasing members towards a one or the other of the opposite first and second biasing system positions thereby urging the valve body member of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions.

With reference next to <FIG> and <FIG> together with <FIG> and <FIG>, in accordance with an embodiment, a run selector apparatus <NUM> is self-compensating for obstructions that may lodge between the valve body member and the housing that would prevent the valve body member from completing the full travel to either of the positions shown in <FIG> and <FIG>. In accordance with an example embodiment, a run selector apparatus self-compensated for obstructions includes a valve member <NUM> disposed in the valve housing <NUM> that defines a valve body member <NUM> having a proximal end <NUM> pivotable about a pivot axis <NUM> between opposite first (<FIG> and <FIG>) and second (<FIG> and <FIG>) positions for porting the input fluid flow <NUM> to the first and second output ports <NUM>, <NUM>, respectively, of the housing body <NUM>, and a distal end <NUM> sealing the valve body <NUM> against opposite first and second surfaces <NUM>, <NUM> of the housing body <NUM> for the valve body member <NUM> being disposed in the opposite first and second positions, respectively. In the example embodiment the distal end <NUM> of the valve member <NUM> comprises a flexible portion <NUM> extending along the edge on the distal end <NUM> of the valve body member <NUM>. The flexible portion <NUM> may extend around an inner support portion <NUM> of the valve member <NUM>.

In accordance with an example embodiment, the inner support portion <NUM> of the valve member <NUM> is formed of a first material having a first flexibility characteristic and the flexible portion <NUM> of the valve body is formed of a second material having a second flexibility characteristic that is more flexible than the first flexibility characteristic.

In accordance with a particular example embodiment, inner support portion <NUM> of the valve member <NUM> is formed of a plastic having a durometer of about <NUM>-<NUM> Shore D, and the flexible portion <NUM> of the valve member <NUM> is formed of a plastic having a durometer of about <NUM>-<NUM> Shore D.

In accordance with further a particular example embodiment, the valve body of the valve is formed of a first material having a first average thickness of about <NUM>-<NUM>. in a direction transverse to the pivot axis, and the flexible portion of the valve body is formed of the first material having a second average thickness of about <NUM>-<NUM>. in the direction transverse to the pivot axis that is less than the first average thickness of the valve body.

<FIG> shows an embodiment wherein the flexible portion <NUM> extending along the edge on the distal end <NUM> of the valve body member <NUM> has the same flexibility characteristic relative to the remainder of the valve body member as described above, wherein under a selected force the valve body member <NUM> may be urged to a left or right positions as viewed in the Figure having an orientation of an arbitrary angle relative to a sidewall of the valve housing <NUM> upon first contact. A neutral angle of orientation of about <NUM>° relative to a sidewall of the valve housing <NUM> is used in the drawing Figure as an example of a representative arbitrary angle relative to a sidewall of the valve housing <NUM>.

<FIG> shows an embodiment wherein the flexible portion <NUM> extending along the edge on the distal end <NUM> of the valve body member <NUM> has a different than the flexibility characteristic of the distal end <NUM> of the valve body member <NUM> as described above, wherein under a selected force the valve body member <NUM> may be urged to a position having an minimum interfence of a first amount relative to a sidewall of the valve housing <NUM>. An orientation of about <NUM>° relative to a sidewall <NUM> of the valve housing <NUM> is used in the drawing Figure as an example of a representative angle established relative to the sidewall of the valve housing <NUM> in the minimum interference mode of operation in accordance with an example embodiment.

<FIG> shows an embodiment wherein the flexible portion <NUM> extending along the edge on the distal end <NUM> of the valve body member <NUM> has a different than the flexibility characteristic of the distal end <NUM> of the valve body member <NUM> ascribed above, wherein under a selected force the valve body member <NUM> may be urged to a position having a nominal interference of a second amount. An orientation of about <NUM>° relative to the opposite sidewall <NUM> of the valve housing <NUM> is used in the drawing Figure as an example of a representative angle established relative to a sidewall of the valve housing <NUM> in the nominal interference mode of operation in accordance with an example embodiment.

Claim 1:
A biasing system (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>) associated with a run selector device having a valve member movable within a housing between opposite first and second run selection positions selecting respective first and second granular commodity distribution runs of the associated run selector device, the biasing system (<NUM>, <NUM>) comprising:
a first biasing element on the housing of the associated run selector device; and
a second biasing element on the valve member of the associated run selector device,
wherein the first and second biasing elements are movable relative to each other between opposite first and second biasing system positions together with the associated valve member being moved relative to the housing between the opposite first and second run selection positions,
wherein the first and second biasing elements are mutually biased against each other to urge each other apart and towards a one or the other of the opposite first and second biasing system positions, characterized in that
the first biasing element (<NUM>) comprises a spring member (<NUM>) coupled with the housing of the associated run selector device; and
the second biasing element (<NUM>) comprises a cam element (<NUM>) on or otherwise coupled with the valve body member of the associated run selector device,
wherein the spring member and the cam element are mutually biased against each other to urge each other towards a one or the other of the opposite first and second biasing system positions thereby urging the valve body member of the associated run selector device to a corresponding one or the other of the opposite first and second run selection positions.