Abstract: A side dump trailer comprising a trailer body pivotally mounted on a wheeled frame fashioned so as to enable the material within the trailer body to be dumped from either side of the trailer. A pair of spaced-apart saddles are provided at each side of the trailer frame and have rocker pins removably and pivotally received therein. When it is desired to dump the material from the trailer from one side thereof, locks on the rocker pins at the opposite side of the trailer are released and hydraulic cylinders are extended to cause the trailer body to pivot about the rocker pins at the dumping side of the trailer. The body of the trailer is also designed to provide strength and to ensure complete dumping of the contents therein.

Abstract: A portable ice cart provides both elevation adjustment and tilt adjustment for the ice hopper. The ice cart includes a support frame that allows the ice hopper to be tilted to any of a plurality of orientations about a horizontal axis, and a scissors linkage for supporting the support frame at an adjustable elevation above the base of the cart. A retractable spring-loaded pin is used to lock the ice hopper in place after the desired orientation has been reached. The elevation of the ice hopper can be raised by pumping a foot pedal that pressurizes a hydraulic cylinder and extends the scissors linkage.

Abstract: A levered, gravity-assisted, side dump utility cart for transporting and dumping objects and materials has load carrying apparatus, bedframe, a rear carriage, a 360 degree rotatable front carriage, four wheels, and towbar unit. A towbar is used as a lever against underside regions of the bedframe by the operator for manually dumping of loads from either side of the cart. Proximate maximum gravity assistance for levered dumping is obtained by unique and predetermined wheel alignments for each selected embodiment of the side dump cart. For such levered dumping, dump alignment devices define the towbar positions where the proximate maximum gravity assistance is obtained for dumping the load with proximate minimum upward and horizontal force on the towbar lever. The range of selectability and the extent of gravity assistance available to the operator for dumping the cart is determined by the embodiment of this invention.

Abstract: A detachable dumping apparatus comprises a frame including a pair of spaced-apart elongate rails. A rearwardly disposed hitch is attached to the frame and adjustably attachable to the rear bumper of the pickup truck. A plurality of adjustable biasable stabilizer legs are attached to the frame for exerting an outwardly biasing force against each side of the bed of the pickup truck. A bucket having a substantially trapezoidal cross-section is pivotally connected to the frame. At least one arm having first and second ends, wherein the first end is slidably attached to one of the rails and the second end is attached to the bucket. A cable is connected to the first end of the arm for sliding the arm along one of the rails to cause the bucket to pivot with respect to the frame and a winch is operatively connected to the cable.

Abstract: A mobile paving machine which may, with minor modification, be employed either to distribute material along the path of movement of the machine or in a region which is laterally offset to one side of the motion path. In order to spread material in a laterally offset region, which may correspond to a break-down lane being formed along the side of a travel lane, a tiltable secondary skip is installed above the primary skip to which paving material is normally supplied. A scraper is mounted from an extension of the distribution beam of the machine to controllably disperse material discharged through an end of the secondary skip when the loaded secondary skip is angularly inclined to cause gravity induced flow of material into the lateral region.

Abstract: A drop chute extension for unloading a shuttle dumping transport vehicle for harvested cotton bolls extends the length of the conveyor dump side wall when unloading the transport vehicle. The extension of the conveyor dump side wall allows cotton to be dumped in the middle and far side of a module builder or trailer. The drop chute extension can be folded over and down into the basket of the dumping transport vehicle, reducing both the transport height and width of the vehicle. The drop chute extension includes two hydraulic extension arm cylinders which cause the door chute to extend or retract and are interconnected with the hydraulic system of the vehicle lift basket. Operation of the basket lift cylinders is precluded until the extension arm cylinders have fully extended the chute door. The drop chute extension is also joined to a second hydraulic system to operate an unloading conveyor which extends into the extension.

Abstract: A bale carrier having first and second rows of bale cradles pivotally mounted thereon and which are moveable between bale supporting positions and bale dumping positions. A plurality of first safety latches are mounted on the carrier adjacent one of the rows of bale cradles. A plurality of second safety latches are mounted on the carrier adjacent the second row of bale cradles. A plurality of third and fourth safety latches are mounted on the carrier adjacent the first and second rows of bale cradles. The first safety latches are operatively interconnected so that all of the first safety latches may be simultaneously moved together between latched and unlatched positions. The second safety latches are also operatively interconnected so that all of the second safety latches may be simultaneously moved together between their latched and unlatched positions.

Abstract: A tipping system for use in a vehicle including a container having an upper perimetrical frame with an open top and a bowl made of flexible material is suspended from the frame and including means to interact with the bowl in the discharge position to control the shape of the bowl so that contents carried therein will gravity discharge over one side of the perimetrical frame, is disclosed.

Abstract: A trailer for transporting cylindrical bales includes a central frame portion and two side support members. The central frame portion defines two outwardly inclined upper surfaces for receiving the bales extending outwardly from a central apex. The side support members are pivotally mounted adjacent the sides of the central frame and in initial position provide two parallel V-shaped receptacles for two rows of bales. A third row of bales can be mounted on top of the first two rows in the V-shaped area therebetween. The side support members are latched in the transport position and can be released manually so the first one of the side support members pivots downwardly allowing the first and third rows of bales to be discharged. Subsequently the side support members on the other side is released allowing the second row to be discharged. The side support members can be pivoted inwardly to a highway width which automatically resets the latch mechanism.

Abstract: The present invention relates to a new and improved trailer for unloading large cylindrical bales of hay. The trailer has a simple rectangular frame that holds hay bale carriers in place by a dual latch/keeper assembly mechanism. The dual latch/keeper assembly allows the cradle to tilt in either lateral direction to dump the hay bales on either side of the trailer. As a safety factor for the operator, the release for the latch/keeper assembly is on the opposite side from the side upon which the carrier dumps. The present invention may include a pedestal which holds a hay bale cradle over the wheels. The pedestal is removably mounted so that both the pedestal and the pedestal cradle can be removed thereby allowing the trailer to carry goods other than hay, such as irrigation pipe. The raised pedestal also allows for fenders over the wheels of the trailer. Fenders and lights are provided to ensure that the trailer is street worthy.

Abstract: A bale carrier comprising a wheeled frame having a plurality of bale cradles pivotally mounted, about a horizontal axis, thereon. The bale cradles may be selectively pivoted toward either side of the wheeled frame so that the bales may be dumped from either side of the carrier. A locking mechanism is provided for each of the bale cradles for preventing the dumping of the bales therefrom until the desired time.

Abstract: This invention provides a farm implement that is transformable between three different configurations in order to perform three different tasks. In a first configuration, the invention is suitable for hauling goods. By rotating its side members about their outer edges, the invention may be transformed into a second configuration, which is suitable for unloading goods. By rotating its side members about their inner edges, the invention may be transformed into a third configuration, which is suitable for presenting goods to livestock.

Abstract: A high lift farm dump box particularly constructed to produce a stable unit when the box supporting sections are in extended position by providing a stabilizing cross bar which not only supports the dumping cylinders for the box but also provides a stabilizing connection between the lower ends of the upper strut sections and the upper ends of the next lower strut sections.

Abstract: A large round bale handling apparatus has a mobile frame with a pair of laterally-spaced longitudinal beams which can receive and support large round bales end-to-end in a row with their axes generally aligned and extending parallel to the beams. The apparatus also has a bale pickup mechanism, a bale pushing mechanism, and a bale unloading mechanism, each mounted to the mobile frame. The bale pickup mechanism is pivotally mounted adjacent the front and along one side of the mobile frame for movement between horizontal bale-engaging and upright bale-discharging positions.

Abstract: A cotton cart with a discharge control apparatus in the basket is provided. A tray-shaped member is mounted in the basket for movement between a retracted position and a discharge position. The member is supported by a system of links so that the member pivots about a moving pivot point. As a result, the leading edge of the member follows an eccentrically arced path which conforms substantially to the inner contour of the basket to facilitate evacuation of the basket. The member is operated by a hydraulic cylinder, thereby enabling the operator to manipulate the cotton bolls during the discharge procedure.

Abstract: A farm utility wagon for carrying round or cylindrical bales with a center superstructure running from the front to the rear of the wagon. The superstructure can be raised or lowered by hydraulic cylinders. When the superstructure is in a lowered position it forms with the wagon base two parallel channels on to which two parallel rows of round or cylindrical bales can be set and moved. When the superstructure is raised, the bales are forced off to the side.

Abstract: Cotton harvester basket structure including an upper basket portion telescopingly received within a lower basket portion and first hydraulic actuators for moving the basket between harvesting and dump positions and second actuators for telescoping the basket portions between a retracted storage position and an extended field-working position. An unloading conveyor and compacting augers are connected to and movable with the upper basket portion, and the compacting augers also serve to meter cotton during the dump cycle. Telescoping cotton conveying ducts are movable with the upper basket portion between retracted transport and raised field-working positions. Hydraulic circuitry includes valves for selectively controlling the basket telescoping and dump functions and the conveyor and compacting auger operations.

Abstract: A round bale trailer includes a trailer that travels in a hay field in the same direction that the field is normally worked to approach round hay bales in a direction perpendicular to the bales' axes. A U-shaped fork on the round bale trailer engages three sides of the bale. A closing arm on the fork closes to engage the bale on the fourth side. Continued motion of the trailer causes the fork and bale to rotate together 90 degrees about a vertical axis such that the fork closes to nest within a generally U-shaped frame. A hydraulic cylinder immediately operates to pivot the frame and fork to a vertical attitude, such that the bale rolls off the fork and onto the trailer. Pivoting the frame to the horizontal attitude automatically opens the fork by the use of a spring. All the bales are unloaded at one time by an unloading mechanism that tilts the trailer such that the bales roll off one side thereof.

Abstract: A toy has a body and a tipping load carrier which is rotatably mounted in the body about a horizontal axis for rotation between a load-receiving position and at least one tipping position. The body has a planar upper surface portion. The load carrier has a planar lower surface portion with which the load carrier, when in its load-receiving position, is resting on the planar upper surface portion of the body. Each of two mutually aligned pivot pins defining said axis is fixed to one of the load carrier and the body. The pivot pins are mounted each in a vertically elongate hole which is formed in the other of the load carrier and the body.

Abstract: The disclosure herein describes a vehicle for curbside collection of source separated recyclable materials. A dumping unit includes a box-like frame having a series of compartments to receive the separated materials and includes, along one side wall thereof, a vertically movable trough having a series of compartments receiving the recyclable materials. The trough moves upwardly along the said side wall to an upper discharging position whereby the separated materials are dumped into the compartments of the frame. A cylinder located centrally between the understructure and the frame cooperates with pin-engaged hinge points on either side or rear of the frame to tilt the frame on any one side depending on where the pins are engaged in the hinge points. Doors at the bottom of each compartment allow the discharging of the contents of the compartments whenever the frame is tilted on one side or the other.

Abstract: A vehicle body having a frame, a pair of side dumpable compartments, and a rear dumpable compartment. Each of the side dumpable compartments is rotatably mounted to the frame such that the axis of rotation is parallel to the longitudinal axis of the vehicle body. Each of the side dumpable compartments has a well on the side of the compartment opposite the axis of rotation. A hydraulic actuator is disposed between the side dumpable compartment and the frame so as to cause the rotation and unloading of the side compartment. The rear dumpable compartment is rotatably connected to the frame such that the axis of rotation is transverse to the longitudinal axis of the vehicle body. This rear dumpable compartment has a tailgate that is selectably openable for permitting the dumping of material from the interior of this rear compartment. A hydraulic arm extends between the rear dumpable compartment and the frame so as to cause the rear dumpable compartment to rotate about its axis and to dump the materials.

Abstract: A lorry fitted with a known system which allows it to handle a container in order to load it, to unload it onto the ground, or to tilt it towards the rear to accomplish a tipping operation. A platform of a detachable cradle has a jack which operates a tipping chassis. A longitudinal pivot shaft of the tipping chassis is mounted at the side of the cradle, which permits lateral tipping of the container. Another jack, and the alternative fitting of one or the other of two longitudinal pivot shafts, permits selective tipping to the right or left side of the lorry as desired.

Abstract: A unique truss transportation trailer which provides a truss support trailer that may be easily and safely controlled by a single operator and which can be utilized to transport a large variety of truss sizes and configurations safely from the point of manufacture to the point of use.

Abstract: A conveyor is mounted on the slope side of a cotton basket. Lift structure pivots the basket until the slope side of the basket angles slightly downwardly toward the trailer or module builder which receives the cotton. The conveyor moves the cotton from the basket, and a metering bar positioned above and inwardly from the dump end of the conveyor when the basket is in the dump position is rotated with the conveyor drive to assure a smooth continuous flow of cotton without bunching or stalling on the conveyor.

Abstract: The improved assembly includes a truck having a generally horizontal trailer frame supported on rotatable wheels. The upper surface of the frame preferably includes a dished portion adapted to receive the assembly's open-topped, curved container bin, and also includes spaced rollers rotatably supporting the bin above the bottom surface of the dished portion. An upwardly directed tilt link is pivotally connected to at least one end of the frame adjacent one side thereof and to the upper end of the bin adjacent the opposite side thereof. A ram, preferably hydraulic, is pivotally connected to the side of the frame at a point remote from the tilt link and extends upwardly to pivotally connect to the upper part of the bin. If desired, a pair of tilt links can be used at opposite ends of the frame, with the ram spaced therebetween. During extension of the ram, the bin initially rotates on the rollers, without lateral displacement, enabling side loading from low slung bucket arms.

Abstract: A bale rack comprises an elongate horizontal frame mounted on wheels for movement along the ground, and a pair of bale supports extending along opposite sides of the frame. The bale supports are pivotable relative to the frame between a raised position, in which the bale supports serve to retain bales on the frame, and a load release position, in which the bale supports are downwardly and laterally inclined from the frame to allow a bale to roll from the frame to the ground. Latch mechanisms are provided for releasably retaining the bale supports in the raised positions, and counterweights are provided for urging the bale supports from the lowered positions to the raised positions, thus avoiding the use of springs, hydraulic devices or other relatively complicated mechanisms for this purpose.

Abstract: A hydraulic stabilizing mechanism for connection with a main hydraulic hoist system for automatically actuating at least a pair of stabilizing cylinders to extend the same into statilizing position whenever the main hoist system is extended and positively prevent the stabilizing cylinders from retracting until the main hoist system is in fully retracted position, and more specifically, a hydraulic stabilizing mechanism for farm wagon dump boxes which provides hydraulically actuated stabilizing strut elements between the wagon bolster and the front axle which are maintained in extended stabilizing position whenever the hydraulic box dumping mechanism is extended.

Abstract: A cotton harvester basket for accumulating picked cotton comprises four walls, a floor with a conveyor and a detachable roof section. The basket is vertically moveable between its raised and lowered positions by hydraulic cylinders disposed at the opposite ends of the basket. The same cylinders can be used for telescopically bringing the roof section into and out of the space encompassed by the basket walls.

Abstract: An apparatus for handling bales having a frame, an axle secured to the frame, and a pair of wheels rotatably attached to the axle for supporting the frame. A pair of arcuate shaped baskets is mounted on the frame for holding the bales. A pair of hydraulic cylinders are secured to the frame for receiving power take off from a tractor to pivot the baskets along the longitudinal axis thereof for dumping the bales onto the ground. The method includes the steps of loading the bales into the baskets and pivoting the baskets to dump the bales.

Abstract: A dual side-dumping truck and trailer combination utilizing a dolly-type trailer and a frameless material hauling bed. The bed is suspended on bunk assemblies mounted rotatably on bolsters on the truck frame and the trailer frame. Hinge mounting arrangements on the ends of the bunk assemblies enable selective tilting of the bed to one side or the other. The dolly-type trailer provides increased maneuverability and improved safety factor by enabling jackknifing while dumping.

Abstract: A safety latch mechanism for extensible strut elements mounted on stationary strut members such as are used for farm dump boxes, said latch mechanism including elongated latch bars pivotally mounted at their upper ends on the extensible strut elements for longitudinal movement therewith, stop lugs respectively fixed to the stationary strut members for respectively engaging the latch bars when said strut elements are in extended position, and a releasing lever pivotally mounted on the lower end of each latch bar, and having a fulcrum positioned to engage the lever to release each latch bar when the dump box is in lowered position to engage the releasing lever.

Abstract: A chassis supports a main frame with one open side, and a dump box with an open upper side is situated within the main frame and pivoted to the other side of the main frame. An hydraulic piston and cylinder assembly can move the box from the vertical or normal position to a tilted or unloading position. The dump box is pivoted to the upper side of the main frame at a line spaced from the top side edge of the dump box so that the top side edge extends beyond the side of the wagon when tipped or tilted. A conveyor is situated on the side of the dump box which is pivoted to the main frame and driven by an hydraulic motor. Material is loaded in the open upper side of the dump box and when it is to be unloaded, the dump box is tilted whereupon the conveyor unloads the material from the open upper side of the dump box.

Abstract: A carrier for cylindrical bales of hay utilizes a single, elongate, tubular main body member with an axle and wheels mounted thereto for movement and drafting as a trailer. A plurality of bale supporting cradles are mounted along the main body member at intervals. The cradles are rotatable about a vertical axis for selectively carrying the bales with the bale longitudinal axes either longitudinally or transversely aligned to the main body member for loading by various types of equipment. The cradles are also tiltable from side to side of the main body member by a latch extending between the main body member and a cradle pivot structure to allow gravitational force to tilt the cradle and drop the bale onto the ground.

Abstract: A railroad dump car, such as a side dump rail car, uses hydraulic actuators to tilt the dump body to permit unloading of the contents of the dump body. A hydraulic booster pump is connected to the auxiliary air supply of the train. The booster pump converts the relatively low pressure (about 90 psi) air to a high hydraulic pressure (about 3000 psi). In another embodiment, a bidirectional rotary pump driven from the rail car axle pumps the hydraulic fluid. The booster pump (or the bidirectional rotary pump) pumps hydraulic fluid from a hydraulic reservoir to a hydraulic accumulator, which receives the hydraulic fluid and stores the hydraulic fluid under pressure. When the hydraulic accumulator is fully charged, the operator triggers a valve to cause dumping. The valve causes the hydraulic accumulator means to supply the pressurized hydraulic fluid to the hydraulic actuators, which pivot the dump body with respect to the car frame to unload the contents of the dump body.

Abstract: A receptacle lift apparatus for a cotton harvester or other dumping vehicle including a linear hydraulic motor including a first rod and piston assembly attached to the receptacle and a second rod and piston assembly attached to the chassis and a floating cylindrical housing receiving the first piston in one end and the second piston in the other end being independent of the chassis and receptacle for axially unrestrained movement relative thereto.

Abstract: A side dump cart useful for carting lengths of pipe and steel in various forms and other items and comprising a frame with wheels, a load-carrying platform tiltably mounted thereon and held from tilting during travel by a latch which is releasable for allowing the platform to tilt for dumping the load. A safety spring maintains the latch in latching position; a guard protects the latch operating surface from accidental engagement forces; a removable catch further prevents the platfrom from tilting; and the guard and catch being released by a separate motion of the operator from the releasing of the latch.

Abstract: A seed cotton transport is provided to transport seed cotton from the cotton stripper or harvester to a module builder. The basket upon the trailer or transport is pivoted about a point which is elevated above the sides of the module builder which is approximately eleven feet above the surface of the ground. The pivot is outboard of the wheels of the trailer. In the dump position, the weight is primarily to one side and as indicated above is very high. To prevent the trailer from overturning, stabilizing struts are hydraulicly extended any time the tilt or dump cylinders are pressurized to elevate the basket. A restricted one-way valve is used to insure that the cylinders operate in proper sequence.

Abstract: In a dump box attachment, a gate panel operator includes a pair of pivotally interconnected lever arms which are operatively associated with each end of a gate panel, each pair of arms being operative automatically in response to the tilting or lifting movement of the dump box to amplify that movement in prematurely opening the gate panel so as to unload the contents of the box without imposing substantial loads on the panel.

Abstract: A basket lift apparatus for a cotton harvester including a pair of linear hydraulic motors having floating axially unrestrained housings is provided with a variable length guide tube assembly pivotally connected between the respective cylinder housings to prevent rotation thereof.

Abstract: A transporter or vehicle for articles having a container for receiving articles to be transported. A frame assembly supports the container on a chassis. Guides extend vertically upwardly from the chassis for guiding vertical translation of the frame, and the frame is pivotally connected to an upper portion of the container so that the container is rotatable about one of its side edges. Piston-cylinder units are interconnected between fore and aft portions of the chassis and the container in such manner that initial movement of the pistons out of the cylinders vertically translates the interconnected frame and container. After the frame and container have reached a predetermined height, continued movement of the pistons out of the cylinders results in pivoting of the container with respect to the frame to thereby dump the contents of the container.

Abstract: A container dumping mechanism includes first and second sides. A carrier is positioned on the frame for movement relative thereto. The carrier includes a mechanism for supporting a container to be dumped. A dumping assembly is operably connected to the carrier and includes an actuating mechanism which is selectively actuable in first and second modes. In the first mode, the actuating mechanism is actuable to raise and generally invert the carrier at the first side of the frame to dump the contents of the container over the first side. In the second mode, the actuating mechanism is actuable to raise and generally invert the carrier at the second side of the frame to dump the contents of the container over the second side. The actuating mechanism is further actuable in a third mode for rotating the carrier essentially in place about a longitudinal axis to dump the contents of the container directly therebeneath.

Abstract: The bale carrier functions as a bale loading, transporting and unloading apparatus. It comprises an elongated base framework mounted on wheels, an elongated bale supporting bed aligned over and supported by the base framework, a power operated bale loader mounted on one side of the base framework as a satellite assembly near one end of the bale supporting bed, a power operated bale mounted upon the base framework at a longitudinal location proximate to the end of the bale supporting bed at which the bale loader is located, and selectively operable device for tilting the bale supporting bed to dump loaded bales therefrom over the lateral side of the base framework opposite the bale loader.

Abstract: A garbage collecting truck having two separate compartments, one to receive recyclable materials, such as paper, fabric and the like, and the other to receive the remainder mainly non-recyclable waste of the garbage. The two compartments are of elongated shape, are mounted side by side on the truck chassis longitudinally of the same and both are inclined upwardly towards the front of the truck. Both compartments can be loaded from the rear of the truck by persons standing on the ground, and each has a hydraulic ram to push the loaded material forwardly. The recyclable material in the one compartment is formed into successive bales, any two of which can be stacked on a platform located ahead of the elevated discharge outlet of said one compartment.

Abstract: An apparatus is disclosed for side loading and unloading large objects such as cylindrical fuel tanks from flat bed trailers. Double pivoted links in combination with a bent lever permits lateral loading and unloading from a plane below the level of the trailer bed.

Abstract: A transport container on a truck or a trailer may be lifted by means of two pivot arms operated by hydraulic jacks. The container is rotated in response to the lifting movement and in the final emptying position, the center of gravity of the container is still vertically inside the track of the wheels of the truck or trailer.

Abstract: A dumping transport vehicle is provided for transporting picked or stripped cotton from a harvester back to the module. A large capacity dump box or basket features strategically located wire mesh panels to allow air to escape when the cotton is delivered into the dump basket so that the cotton will not boil out over the top of the dump basket and will properly settle therein. Additionally, the vehicle features improved geometry for the basket dumping cylinders in relation to the dumping pivot for the basket and the supporting wheeled frame so that the loaded device will be stable and will remain adequately stable when the cotton is dumped into the top of the module.

Abstract: Apparatus is provided for sorting trees in situ in the forest immediately after being cut, the steps of limbing and topping optionally being included prior to the sorting operation. To this end a vehicle is provided having at least four dumping bunks. Trees of different sizes or species are loaded into the different bunks. The inner two bunks dump to the rear of the vehicle, while the outer two bunks dump to the sides of the vehicle.

Abstract: An article carrying and unloading device primarily designed to transport and unload at specific locations large, substantially cylindrical bales of hay or the like. A support frame which may be in the form of a mobile trailer has one or more cradle assemblies pivotally connected to the support frame and, accordingly, movable between a carrying and an unloading position. At least one cradle support assembly is disposed in at least partially supporting relation between each cradle assembly and the support frame wherein this cradle support assembly is movable relative to the support frame by manipulation of a locking element allowing displacement of the one cradle assembly and thereby removal of a primary support such that gravity, and weight of the carried article, automatically forces the cradle assembly from its carrying to its unloading position.

Abstract: A rack for a land vehicle such as for hauling large round bales of hay, straw, etc. includes a base attachable to the land vehicle, a pair of load-carrying racks pivotally carried thereon, the racks when loaded being pivotable or tiltable in response to gravity, and a trip-lock mechanism for selectably releasing the racks to enable them to tilt and to thereby unload themselves.

Abstract: A vehicle-carried cargo box has a normally upright gate hinged along its lower margin so as to swing outwardly. An operator system includes a cable track sector mounted at one end of the gate to rotate about an axis as the gate is swung. One end of that sector is coupled to the gate above its lower margin. A motive drive system is mounted on the underside of the cargo box, and a cable is coupled between the track sector and that drive system. The cable is routed between the track sector and the drive system, operation of the drive system working the track sector by means of the cable to effect the opening and closing movement of the gate.