Abstract: An apparatus for processing agricultural product having a main frame, a support for the main frame configured so that the main frame can be advanced in an operating direction over an area in which agricultural product is grown, and an operating system on the main frame configured to advance unearthed agricultural product intermixed with debris in a conveying direction in a conveying path between an input location and a first point of use. A first processing assembly a) advances unearthed agricultural product intermixed with debris in the conveying direction towards the first point of use; and b) allows intermixed debris to separate from the agricultural product as it is advanced in the conveying direction. A plurality of processing assemblies downstream of the first processing assembly separate intermixed debris in the form of vines from the agricultural product in different manners as the agricultural product is advanced in the conveying direction.

Abstract: A sickle bar drive mount may include an arm and a sickle bar drive eye. The arm is mountable to a horizontally extending sickle bar. The sickle bar drive eye is to receive a sickle bar drive bearing of a sickle bar drive. The arm may extend along a first horizontal axis parallel to the sickle bar. The sickle bar drive eye is pivotally coupled to the arm for pivotal movement about a second horizontal axis perpendicular to the first axis.

Abstract: Example dynamically adjustable tether systems are described herein. An example tether system for use with an unmanned aerial vehicle (UAV) may include a base and a vertically-oriented elongate structure having an adjustable height. For instance, the elongate structure may include a lower end, and an upper end. The elongate structure may also couple to the base proximate the lower end. The system may further include a tether that extends from a first coupling-point positioned proximate the upper end of the elongate structure to a second coupling-point positioned on the UAV and a computing system configured for performing a set of acts, such as detecting a change in height of the elongate structure, and causing the tether to be reconfigured within the tether system based on the detected change in height of the elongate structure.

Abstract: A draper belt includes a carcass (7), a plurality of cleats (1) extending from the carcass (7), a plurality of v-guides (4) disposed perpendicular to the plurality of cleats, and at least one sensor for measuring and relaying information regarding key measurable properties about the draper belt. The key measurable properties may be relayed to an operator, a control system, or combination thereof. In some cases, the sensors measure and relay potentially damaging condition(s) of the draper belt. In some aspects, the sensors measure and relay in real time so one or more properties of the draper belt is ascertainable in situ.

Abstract: A cutter guard assembly for a knife drive of an agricultural farm implement is provided. The cutter guard assembly includes a cutter bar assembly, a window frame, and a floor sheet. The cutter bar assembly has a cutter bar and a reciprocating knife assembly operatively connected to a knife drive. The window frame is rigidly attached to the cutter bar. The window frame includes an opening through which a knife arm of the reciprocating knife assembly extends through. The floor sheet extends rearwardly from the cutter bar and pivots relative to the window frame.

Abstract: A header for an agricultural harvester including a skid shoe that is resistant to penetration into soil. The skid shoe includes a central portion having a fore end, an aft end, and first and second lateral sides extending between the fore and aft ends. At least a first upwardly directed surface extends from the first lateral side and defines a first soil deflecting surface configured to resist penetration of the skid shoe into soil. The header includes a chassis that experiences upwardly and radially directed applied loads during operation, including during turning of the header. The skid shoe is operable to receive such loads while effectively deflecting soil as the header traverses a field being harvested. As a result of the upwardly directed surface of the skid shoe, less damage is inflicted on the field and the crop growing therein.

Abstract: A header frame of an agricultural harvester capable of adjusting the position of attachment of a toolbar to a main frame including a main frame, first and second sides attached to respective lateral ends of the main frame, a toolbar, a brace and an adjustable bracketing assembly. The toolbar extends in a widthwise direction of the main frame. The brace includes a first end attached to the main frame and extends in a direction towards the toolbar. The adjustable bracketing assembly connects the brace to the toolbar and includes a bracket for connecting to the toolbar, and a mount attached to the brace. The bracket is attachable to the mount about a plurality of positions.

Abstract: The present invention relates to a belt guard assembly suitable for the harvesting platforms of the type that are carried on the front end of an agricultural combine. More specifically, belt guard assembly covers the void region at the front margin of the draper conveyor system and seals it against the entry of crop residue and foreign objects. The belt guard assembly is provided with a resilient seal strip that overlaps with the upper belt run, and with a rotary joint to permit flexibility between the cutterbar assembly and the draper conveyor.

Abstract: The present invention relates to a belt guard assembly suitable for the harvesting platforms of the type that are carried on the front end of an agricultural combine. More specifically, belt guard assembly covers the void region at the front margin of the draper conveyor system and seals it against the entry of crop residue and foreign objects. The belt guard assembly is provided with a resilient seal strip that overlaps with the upper belt run, and with a rotary joint to permit flexibility between the cutterbar assembly and the draper conveyor.

Abstract: A draper platform for a combine harvester has a center section attachable to a feed channel of the combine harvester. Lateral sections are arranged laterally on opposite ends of the center section. The center section has a center frame; the lateral sections have a lateral frame and are pivotable relative to the center section about a pivot axis that is oriented in travel direction of the draper platform. A cutter bar is provided and pivotable arms having a first end connected to the cutter bar and a second end connected to the center frame or the lateral frames connect the cutter bar pivotably to the center section and the lateral sections. Drive devices are operatively connected to the cutter bar and conveying devices that convey cut stalk material. The pivotable arms are arranged such that less than one of them is present per meter of working width of the draper platform.

Abstract: A feeder drum used in an agriculture head to force the cut crop through an opening of the head. More specifically, the feeder drum is used to produce the transition from the lateral movement of the crop through the platform to a transverse longitudinal movement (with respect to lateral movement) which directs it to the platform carrier's feeder. Even more specifically, the feeder drum comprises a plurality of fins or blades attached to a cylinder, wherein the fins contain one side with a profile describing a convex curve.

Abstract: The present invention relates to a flexible agricultural platform characterized by having a plurality of support arms constructed especially composed of multiple sections hinged together, arranged to hold the cutterbar assembly. The set of multiple-beam pivoting arms used to hold the cutting mechanism of a draper conveyor type agricultural platform on multiple support points evenly distributed across the width of the main frame, and in a manner to admit the cutterbar to flex along its width—without intermediate rigid sections—in response to changes in the curvature of field while the platform is advanced.

Abstract: A harvesting header includes a header frame, a flexible cutterbar assembly, and a draper assembly. The cutterbar assembly is mounted to the header frame and includes a plurality of skids. Each of the skids has a lower margin configured to engage the ground such that the skids cooperatively cause flexing of the cutterbar assembly along the length thereof in response to changes in terrain as the header is advanced. Each skid presents a skid surface extending from the lower skid margin.

Abstract: A harvesting header (100) comprises a frame (101) having a rear aperture (138). Crop is harvested and fed towards and through the rear aperture (138). A conveyor drum (136) is mounted above and in front of the rear aperture (138). The conveyor drum (136) has a cylindrical section (144) and frusto-conical end sections (148) on both ends of the cylindrical section (144). Retractable fingers (146) extend outwards from the cylindrical section (144) and from each frusto-conical end section (148). The retractable fingers (146) extending from the frusto-conical end sections (148) are angled towards the side.

Abstract: A draper header has a transverse main frame supporting center, left side and right side belt conveyors and including a plurality of transversely spaced knife support members that extend forwardly beneath the belt conveyors from right and left lower rear main frame members and have forward ends on which a transversely extending knife is supported. Each belt conveyor includes a frame disposed within an endless belt and having a rear side hinged to a respective lower rear main frame member for pivoting upwardly between operating and belt-changing positions. Brackets are removably fixed across the length of the knife and have rear edges extending above front edges of the belts when the conveyors are in their operating positions. At least one height adjuster is mounted between the main frame and each conveyor frame for moving each conveyor to its belt-changing position once the associated brackets are removed from the knife.

Abstract: A draper header has a transverse main frame supporting center, left side and right side belt conveyors and including a plurality of transversely spaced knife support members that extend forwardly beneath the belt conveyors from right and left lower rear main frame members and have forward ends on which a transversely extending knife is supported. Each belt conveyor includes a frame disposed within an endless belt and having a rear side hinged to a respective lower rear main frame member for pivoting upwardly between operating and belt-changing positions. Brackets are removably fixed across the length of the knife and have rear edges extending above front edges of the belts when the conveyors are in their operating positions. At least one height adjuster is mounted between the main frame and each conveyor frame for moving each conveyor to its belt-changing position once the associated brackets are removed from the knife.

Abstract: A cutting platform for use with an agricultural harvesting machine includes at least one platform section. Each platform section has a cutterbar assembly movable in a localized manner in upwards and downwards directions, an endless belt with a leading edge, and a plurality of skid shoes. Each skid shoe extends rearwardly from the cutterbar assembly and has an upper surface defining a belt support for the leading edge of the endless belt.

Abstract: A draper header (102) is provided having the elongate laterally extending frame (104) and two forwardly extending crop dividers (116, 118) at each end. A gear box (120, 122) is mounted on the front of each crop divider (116, 118). The gearbox (120, 122) has two output shafts (148, 152), a first shaft (148) that is coupled to and drives an elongate reciprocating knife (112) extending across the leading edge of the draper header (102) and a second shaft (152) that is coupled to and drives a crop divider knife (128, 129). The crop divider knife (128, 129) includes a quick coupling (144) that engages a quick coupling (154) mounted on the second shaft (152).

Abstract: A crop harvesting header with a cutter bar and a draper assembly has a draper driven by a drive roller at one end and an idler roller at the other end. The draper is carried on a plurality of support rollers parallel to the first and second rollers for supporting the upper run of the draper at spaced positions therealong. The draper includes a front edge of the upper run of the draper arranged at a position adjacent to but spaced from the cutter bar and there is provided an integral extruded sealing member extending along the cutter bar defining a first stiffer portion attached to the cutter bar and a second flexible blade portion which extends rearwardly from the first portion at the cutter bar to lie over and in contact with a bead along a front edge portion of the draper.

Abstract: A crop harvesting header with a cutter bar and a draper assembly has a draper driven by a drive roller at one end and an idler roller at the other end. The draper is carried on a plurality of support rollers parallel to the first and second rollers for supporting the upper run of the draper at spaced positions therealong. The draper includes a front edge of the upper run of the draper arranged at a position adjacent to but spaced from the cutter bar and there is provided an integral extruded sealing member extending along the cutter bar defining a first stiffer portion attached to the cutter bar and a second flexible blade portion which extends rearwardly from the first portion at the cutter bar to lie over and in contact with a bead along a front edge portion of the draper.

Abstract: A header assembly supported on the front of a windrower includes a header configured to process crop material standing in a field and a lean bar as the leading element for contacting crop material and preparing the crop material for processing by the header. The lean bar is positioned forward of the header so that the lean bar is the forward-most element of the header assembly. The header assembly has a plurality of cutting elements arranged in a line transverse the header. A cutter bar shield door is positioned to an elevated position such that a forward most point of the cutter bar shield door is above a rearward most point of the cutter bar shield door. The forward most point of the cutter bar shield door lies on or behind a line drawn between the forward edge of the lean bar and a rotational center of the cutting elements.

Abstract: A cutting assembly for a header of a plant-cutting machine includes a blade assembly fastened to a head assembly, which is configured to be drivingly connected to a motor. The cutting assembly is suitable for mounting proximate to the center of the header, in an end-to-end relation with another cutting assembly. Removal of the blade assembly from the head assembly can be efficiently effected by releasing or removing a small number of fasteners, thus allowing an operator to readily remove or replace the blade assembly as needed.

Abstract: A header for a plant cutting machine uses a plurality of compact sickle drive mechanisms incorporated into or beneath a floor or pan of the header at a location between and spaced from the sides or ends of the header, each of which mechanisms can be configured for reciprocatingly driving two knife assemblies disposed in end to end relation, in opposite directions, such that potentially vibratory forces, including those generated by the moving masses of the knife assemblies, at least substantially cancel one another and thus are not transferred to structure of the header. As a result, the knife assemblies can each be relatively short, to lessen the mass thereof so as to be capable of being operated at higher speeds, to enable operation of the header at faster ground speeds.

Abstract: The apparatus is a crop harvesting machine with a header that discharges the crop toward the rear of the machine at the edge of the area harvested. A transverse auger conveyor moves the cut crop to one side of the machine where rotating paddles attached to the auger conveyor center tube push the cut crop out toward the rear through a discharge opening that defines the windrow being formed.

Abstract: A draper header for a combine harvester includes two side drapers each running from an outer end guide roller at a first end of the header to an inner end guide roller adjacent the discharge location of the header and a central feed draper located at the discharge location and including a front guide roller just behind the cutter bar and running to a rear guide roller in front of the feeder house of the combine harvester. Each inner end guide roller is associated with a respective discharge roller immediately adjacent and parallel to it with a stripper blade in contact with the peripheral surface of the discharge roller so as to strip the crop from the peripheral surface along the full length of the roller. Each stripper blade is inclined downwardly and inwardly to a bottom edge closely adjacent the upper run of the feed draper.

Abstract: A preformed frame for a harvesting machine header having a main beam that is constructed of a single piece tube extending from end to end of the header. The single piece tube is preformed by vertically cutting the tube at a location intermediate the two ends and bending the tube to raise the ends upward and forward. A cap covers the top, front and rear walls of the beam and a gusset plate is placed on the bottom of the single piece tube at the location of the cut. The gusset plate, cap and single piece tube are welded together to hold the preformed shaped of the tube. When the header is supported above ground, the deflection brings the cutterbar, not the main beam, to a substantially straight and horizontal position.

Abstract: A power-driven lawnmower having a main chassis supporting an operator, a pair of forward drive wheels, and a steering wheel utilizes a floating mower deck which covers or houses at least one driven mower blade. The deck is connected to the main chassis by a pair of arms terminating in ball joints affixed to the mower deck which is supported on ground engaging wheels such that the mower deck follows the contour of the ground. A flexible drive belt is connected to a constant power take off element on the main chassis and to the drive mechanism on the deck such that belt is entrained over a constant distance due to the connection of the arms to the chassis and the mower deck.

Abstract: A machine for cutting plant matter equipped with a limiter device includes a first assembly connected to a first unit and a second assembly connected to a second unit. The second unit is connected to the first unit by an articulation allowing the second unit to pivot about an axis of the articulation within limits allowed by at least one stop. The stop is elastically deformable so as to limit pivoting of the second unit about the axis when the second unit is subjected to a first pivoting torque, and so as to tolerate a much greater amount of pivoting of the second unit about the axis when the second unit is subjected to a second pivoting torque.

Abstract: An apparatus for raising and lowering a mower unit, having a control lever movable between a first terminal position and a second terminal position for raising and lowering the mower unit, a link mechanism for raising the mower unit with movement from the first terminal position to the second terminal position of the control lever, a first stopper for holding the control lever in the first terminal position, a second stopper for holding the control lever in the second terminal position, and an assist mechanism for applying a force to the link mechanism to raise the mower unit only when the control lever is located between the first terminal position and the second terminal position.

Abstract: A rotary mower is mounted onto a skid steer loader through a four bar linkage on each side of a mower housing. The linkage is arranged to pivot relative to a mounting bracket on the skid steer loader and relative to a mower housing, with differential lengths between upper and lower sets of links of the four bar linkage. The upper link on each side of the mower is slidably connected to the mower housing to permit the mower housing to pivot a limited amount about a traverse axis during normal operation. The links include stop members that engage when the mower is raised a selected amount to stop relative movement between the links and also to shut off power to the motor driving the mower. The forward end of the housing has depending chains mounted with a channel and providing a shield.

Abstract: The invention discloses improvements to a feederhouse on an agricultural combine. These improvements include a pivoting faceplate between the header and feederhouse. The pivoting faceplate has faceplate position indicia to assist an operator in properly positioning the faceplate. The invention also includes a front drum adjustment mechanism, which use a cam with cam position indicia to properly position the front drum. There is also a stone roll mount plate permitting the proper adjustment of the stone roll relative to the feederhouse floor. There are also stone roll position indicia and a pointer to help position the stone roll.

Abstract: A mower which includes a cutting mechanism connected to a carrying structure by connections wherein each connection includes a device preventing at least some of the vibrations from being transmitted between the cutting mechanism and the carrying structure. The cutting mechanism includes a gear box at which are arranged cutting members each rotating about a respective axis of rotation which is at least approximately vertical during work and the carrying structure to which the cutting mechanism is connected includes at least one connection which has a flexible element.

Abstract: A sickel guard air system for assisting in moving grain about to be cut over a cutter assembly of a harvester thereby preventing grain waste and shatter. The inventive device includes a guard having a pair of extended members and retainer members, a passageway extending through each of the extended members, a nozzle fluidly connected to the passageway for dispersing pressurized air between the extended member and the retainer member. An air pressure system is fluidly connected to the passageways for providing a continuous flow of pressurized air. The pressurized air assists in the feeding of the crop being harvested and also forces shattered bean pods and beans into the header of the combine. In an alternative embodiment, a pair of nozzles are fluidly connected to the passageway and extend outwardly from the extended member in a V-shaped pattern.

Abstract: A suspension for supporting an implement on a vehicle includes a transversely extending pivot shaft secured to a frame of the vehicle and a support link swingably mounted on the pivot shaft at one end portion. A second end portion of the support link extends therefrom in a fore-and-aft direction. Two spaced-apart, fore-and-aft extending support arms are also swingably secured to the pivot shaft at one end portion and are connected at another end portion to opposite sides of the implement. A lift member is coupled to the frame of the vehicle at a first end portion and to the support link at a second end portion for swinging the link about the pivot shaft. A lost motion coupling is provided between a midportion of each of the two support arms and the second end portion of the support link. The lost motion coupling includes a pin and an oversized sleeve for receiving the pin.

Abstract: A device for preventing rocks and dirt from entering a combine including a plurality of grain saver dam sections secured to a bracket by a bolt, bushing, mounting bracket and nut. The grain saver dam section includes a series of cutout sections and horizontal support sections.

Abstract: An apparatus for cutting vegetation under railway tressels and roadways that includes a vehicle chassis having a turntable body mounted thereon. A primary control station is mounted on the turntable body along with a main boom with a vegetation cutting head attached and a second elevating boom with a secondary control station suspended therefrom. Operators man each of the control stations, and the main boom and elevating boom are hydraulically controlled from either of the control stations as the operators cut vegetation from about railway tressels or roadway overpasses while communicating via a two-way intercom system between the control stations. When cutting below the line of sight of the operator in the primary control station, the cutting head is controlled by the secondary control station operator or is lowered by the elevating boom to a level giving a clear view of the vegetation being cut.

Abstract: An arrangement is provided for leveling the blade housing of a mower. The housing is suspended from the underside of a vehicle frame by a pair of suspension arms pivotally connected to the housing and the frame. A pair of brackets are joined to opposite sides of the housing, and a third bracket is joined to an end of the housing. An operator-controlled lift handle is connected to a rod pivotally connected to the frame. Three lift arms are joined to the rod so as to be displaced when the lift handle is actuated. First and second cables extend between respective ones of the pair of brackets, and a third cable extends between the third lift arm and the third bracket. The cables are selectively locked to their respective brackets. When the lift handle is activated to lower the housing to its maximum extent, unlocking of the cable permits the entire housing to settle on the ground.

Abstract: A mounting for a rotary broom on a skid steer loader has a bracket that is attached to a frame plate that mounts on the front attachment plate of the skid steer loader. The front attachment plate can be tilted about a horizontal axis through the use of a tilt cylinder on the skid steer loader. The bracket is in turn pivotally mounted about a horizontal axis adjacent the top of the frame plate, and the weight of the broom, and the mounting bracket tending to pivot the lower portion of the bracket toward the frame plate is counterbalanced by a pair of compression springs on the lower part of the bracket, which react force or movement loads back to the frame plate. In this way, the counterbalancing springs are kept low, out of sight, and out of the way.

Abstract: A mowing apparatus with multiple articulating cutting decks includes a support for the cutting blades which is pivotally attached at one end to the mower and is carried by a rocker arm at the other end. The rocker arm is rotatably attached to the support and has wheels at the front and back ends for supporting the rocker arm on the ground. The vertical position of the wheels relative to the rocker arm is variable.

Abstract: A riding mower is provided and includes a frame, a drive shaft, an engine for selectively rotating the drive shaft, a mower deck having first and second ends, coupling for selectively coupling the drive shaft to the mower deck, a lift cylinder for selectively lifting the mower deck, and a deck attachment mechanism for attaching the mower deck to the frame and to the lift cylinder.

Abstract: A riding lawn mower has wheels which are spring suspended from the chassis and a floating-type cutter deck hangs from the chassis. When a wheel moves upwardly relative to the chassis, as occurs when the wheel goes across a bump or when the chassis leans in a turn, a nearby portion of the cutter deck is lifted upwardly in response. In one embodiment, the drive wheels are independently spring suspended rear wheels and the cutter deck is mounted between the front and rear wheels. On each side of the machine a chain runs from a lifting bracket attached to each rear wheel motor mount and runs down to the rear end of the deck. So, when a wheel moves upwardly the deck is moved upwardly. In another embodiment, the front wheels are the spring suspended drive wheels and the cutter deck is cantilevered from the front end of the machine. The rear end of the cutter deck is lifted upwardly upon upward wheel motion.

Abstract: A riding mower is provided that includes a frame, an engine operatively attached to the frame and providing locomotion to the riding mower, a first front wheel operatively attached to the frame, a first back wheel operatively attached to the frame and a back axle forming a back axle axis. The first front wheel forms a front wheel axis and the first back wheel forms a back wheel axis. The back wheel axis is longitudinally spaced from the front wheel axis by a wheel base distance. The engine is longitudinally spaced forwardly of the back axle axis. In this way, the center of gravity of the riding mower is positioned relatively low and forward as compared to other known riding mowers. The first front wheel provides the front-most surface for the riding mower and the first back wheel provides the back-most surface for the riding mower.

Abstract: A cutting machine including a cutting mechanism which can occupy at least one work position and one set-down position; a hitching structure; a carrying beam connected on the one hand to the hitching structure by a first articulation and on the other hand to the cutting mechanism by a second articulation; a lightening device including an elastically deformable element, and a locking device intended to block the first and second articulations. In the set-down position, the hitching structure and the carrying beam are held by the elastically deformable element and the first and second articulations are locked.

Abstract: A mower includes a cutting mechanism extending, in a work position, transversely to the direction of travel during work; a hitch structure connectable to the hitch device of a motor vehicle; a carrying beam articulated on the one hand to the hitch structure by a first articulation and on the other hand to the cutting mechanism by a second articulation; a lightening device which includes an elastic element intended to lighten the cutting mechanism in the work position; a control device which includes a body connected to the hitch structure by a third articulation; a tie rod connected to one of the ends of said elastic element and sliding on the other hand in said body; a stop element limiting, at least in one direction, sliding of the tie rod with respect to the body; and a set-down member connected, in the set-down position, to the carrying beam by the stop element.

Abstract: A front mounted mower deck includes a mounting and support assembly for operably joining the deck to a motorized vehicle. The mounting and support assembly includes a pair of pusher bars swivelly attached at one end to the deck and at the opposite end to the vehicle. A hanger is pivotally mounted on each pusher bar and includes a slot which receives a slot follower mounted on the deck to allow articulation from side to side by movement of the slot followers in the slots. Each hanger is biased to maintain an associated slot follower in the slot therefor. However, the hanger can be manually manipulated to overcome the biasing force so that the slot followers are released from the slots, thereby allowing the deck to be rotated about the connection with the pusher bars to provide for cleaning, maintenance, etc.

Abstract: An implement lift mechanism for a grounds care device uses a lost motion interconnection between a rotary lift flange and an integral lift/connector link coaxial therewith to selectively control the height of the implement. The lost motion interconnection allows the implement to float upwards over uneven terrain. Additionally, a spring can be used to assist in aiding the implement and reducing lift force.

Abstract: A rear suspension device for a ride-on mower includes a pivoting assembly coupled to the frame of the ride-on mower by a torsion bar which has a transversely extending back portion that can be trapped between projections on the rear portion of the frame of the mower and a front surface of the pivoting assembly. Portions of the torsion bar extend substantially parallel to a longitudinal axis of the ride-on mower and have ends that extend through apertures in torsion bar brackets that are coupled to the pivoting assembly. The suspension device is capable of transferring weight from one portion of the ride-on mower to another portion of the ride-on mower, thereby enhancing stability.

Abstract: A transversely-mounted grass cutter mower combination with a vehicle is provided which is adapted to be activated to move laterally to the right or to the left with respect to its mounting to the vehicle and/or to move vertically up or down with respect to its mounting the vehicle. The vehicle is a motor-driven vehicle having front wheels and rear wheels and a longitudinally-extending frame bed therebetween. A transversely-mounted powered grass-cutting mower, having a mower housing and powered grass cutting blades which is mounted to the frame bed by means of a suspended mounting system. The suspended mounting system includes a cooperative linkage which is secured between the longitudinally-extending frame bed of the motor-driven vehicle and the mower housing. A first powered operator is provided for moving the mower housing, in cooperation with the constraints provided by the cooperative linkage, through an infinite number of vertical locations between an upper limit and a lower limit.

Abstract: A rotary turf mower (32) suitable for mowing irregular turf areas including a cutting system (60) which includes a plurality of cutting units (102) which are movable over the ground and each carrying at least one cutting blade (114), and a coupler (140) including a span member (144) and a pair of hinges means (150) for interconnecting adjacent cutting units (102), wherein each hinges (150) permits relative pivotal movement about a hinge axis (160), and wherein the hinge axes (160) associated with adjacent cutting units (102) are non-parallel, whereby each cutting unit may display a range of independent motion relative to an adjacent cutting unit. One embodiment of the present invention provides that the hinge axes associated with each span member are substantially directed to a virtual pivot point (184), whereby the motion of adjacent cutting units (102) relative to the virtual pivot point (184) is generally rotational.

Abstract: A conventional header of a combine is modified by the addition of a second sickle knife positioned rearwardly of the pan of the header. The second sickle knife is mounted on a bar which is connected to a pair of arms extending under the pan to a forward end pivotally mounted just behind the conventional sickle knife of the header. The arms and the second sickle knife can thus pivot upwardly and downwardly and are mounted on suspension springs carried on the frame of the header. A simple drive from the conventional shaft of the header is connected through a belt to a drive wobble box carried on the second sickle knife at a position partway along its length.