Uneven Terrain Compensation Patents (Class 56/DIG10)
  • Patent number: 6131380
    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.
    Type: Grant
    Filed: November 27, 1998
    Date of Patent: October 17, 2000
    Inventor: Albert Browning
  • Patent number: 6076341
    Abstract: A ground-engaging shoe assembly is provided for a power mower in which a mower blade is rotated in an upright shaft. The ground-engaging shoe includes a hub support assembly which is secured to the mower housing of the power mower. A ground-engaging shoe assembly is secured to a bearing housing which is located at the lower end of a hollow rotatable shaft, the ground-engaging shoe assembly including a bearing within which the hollow shaft rotates, whereby the ground-engaging shoe assembly is stationary. The bearing housing is adapted selectively to accept different ground-engaging shoes. An adjusting bolt extends through the hollow shaft and is secured at its lower end to the bearing housing An upper tower housing is adapted to transfer loading weight through the adjusting bolt to the bearings. The adjusting bolt is vertically-adjustably-secured at its upper end with respect to the upper tower housing by means of a locking-type nut.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: June 20, 2000
    Inventor: Elwyn Gummerson
  • Patent number: 6065274
    Abstract: A mowing apparatus with multiple articulating cutting decks includes a pair of side cutting decks attached to a center cutting deck. The side decks are pivotally attached to the center deck and pivot about axes which lie in the planes defined by rotation of the respective cutting blades. The cutting blades are driven by pulleys and belts. Proper tension in each side drive belt is maintained during pivoting of the corresponding side deck by an assembly comprising a pair of idler pulleys rotatably mounted on a pivotally attached pulley arm which is biased in the direction which increases tension on the belt.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: May 23, 2000
    Assignee: LasTec, Inc.
    Inventors: Jeffrey J. Laskowski, Thomas M. Rich
  • Patent number: 6047530
    Abstract: A gang-type rotary lawn mower including a frame supported by wheels for movement over the ground, a power source which is mounted on the frame and which drives at least two of the wheels, an operator's seat mounted on the frame, a steering system enabling the operator to steer the lawn mower, at least two side-by-side front rotary cutting deck assemblies mounted on the frame, the front deck assemblies defining a gap between adjacent front deck assemblies, and at least one rear rotary cutting deck assembly mounted on the frame behind the front deck assemblies, each rear deck assembly being aligned with a respective gap between adjacent front deck assemblies, each of the front and rear deck assemblies including a single-spindle mulching deck defining a downwardly opening space, a single spindle mounted for rotation about a generally vertical axis within the space, and at least one cutting blade mounted on the spindle for rotation therewith.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: April 11, 2000
    Assignee: Textron, Inc.
    Inventor: Richard D. Bednar
  • Patent number: 6041583
    Abstract: A harvester head, such as an ultra-narrow row cotton (UNRC) fingerhead, includes one or more rockshaft cylinders connected to a hydraulic circuit including first and second closed center valves connected to a shuttle valve to allow the rockshaft cylinders to be controlled by two separate height sensing shoes, one at each end of the head, which are not mechanically linked to each other. The closed center valves provide a positive displacement of oil to and from the rockshaft cylinders to control the height of the head. The shuttle valve provides head lift when either of the height sensing shoes indicates a raise condition and head lower only when both shoes indicate a lower condition. Electrohydraulic valves connect the source of hydraulic pressure on the harvester to the cylinders through the shuttle valve for operator selection of raise and automatic height control functions.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: March 28, 2000
    Assignee: Deere & Company
    Inventors: Kevin Jacob Goering, Jonathan Lee Engelstad
  • Patent number: 6000202
    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.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: December 14, 1999
    Assignee: Lastec, Inc.
    Inventor: Jeffrey J. Laskowski
  • Patent number: 5950409
    Abstract: Carriage suspension for supporting a reel mower cutting unit. Two or more elongated rollers extend between opposing ends of the carriage suspension. An arm is provided on at least one end of the carriage suspension. The arm is mounted to the carriage suspension by a pivot mechanism, and is configured for supporting one end of each of the rollers. Coupling members are provided on each end of the rollers, and the coupling members are configured for permitting the angular orientation of a longitudinal axis of each of the rollers to vary relative to the carriage suspension.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: September 14, 1999
    Inventor: Douglas N. Davies
  • Patent number: 5918448
    Abstract: A combine lateral tilt assembly which attaches a crop harvesting header to a combine includes a stationary extension of a combine feeder housing with a pair of rollers positioned on an upper surface thereof. A movable member is removably attachable to a header and includes a pair of roller tracks positioned to receive respective ones of the rollers on the stationary extension such that the movable member is substantially supported by the rollers. The movable member is mounted to tilt while riding on the rollers about an axis which is formed by a pivot pin positioned in a bottom portion of both the movable member and the stationary extension. A single hydraulic piston and cylinder unit connects between the movable member and the stationary extension to thereby selectively tilt the movable member, and the attached header, laterally relative to the combine.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: July 6, 1999
    Assignee: AGCO Corporation
    Inventor: Keith A. Wheeler
  • Patent number: 5862654
    Abstract: An engine mounting structure is provided for use with a turf care machine such as a greens mower. Single cylinder engines, such as are used on greens mowers and similar turf care cutting machines, generate significant vibration. Greens mowers and which are used for finish cutting lose cut quality and precision with excessive vibration. To reduce vibration, an improved mounting structure includes resilient mounts to support the rear portion of the engine on the machine frame. To avoid belt misalignment between the engine drive pulley and the driven pulley powering the cutting reel, which can occur when resiliently mounting an engine, the forward portion of the engine is rigidly secured to the machine frame.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: January 26, 1999
    Assignee: Deere & Company
    Inventors: Richard David Thier, James Edward Muse
  • Patent number: 5816035
    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.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: October 6, 1998
    Assignee: Shivvers, Inc.
    Inventor: Scott Schick
  • Patent number: 5813202
    Abstract: A mechanism for absorbing impacts encountered by a mower deck coupled with a vehicle, including an arm operatively coupled with the vehicle, a longitudinally extending first tube member coupled with the arm and defining a generally linear axis which extends rearwardly and inwardly toward the vehicle, a second tube member operatively coupled with the mower deck, the first tube being slideably received within the second tube for allowing the second tube to shift linearly along the axis as the mower deck encounters frontal impact loads, a compression spring positioned within the tubes for biasing the second tube and mower deck forwardly with respect to the first tube, and the second tube member is allowed to pivot with respect to the first tube member for allowing the mower deck to pivot from side to side to follow undulating ground contours.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: September 29, 1998
    Assignee: Deere & Company
    Inventors: Gerald Eugene Goman, Marlyn Lee Jerke
  • Patent number: 5799475
    Abstract: A riding mower is provided with a first frame element pivotably connected near a forward end to a second frame element and connected at a rearward end to the second frame element by spring means. The connecting members provide a suspension system for the mower in order to decouple the vertical movement of the first frame element from the second frame element and thereby soften the ride. A pivot bar located near the forward end of the first frame element is pivotably received at its ends near opposite side walls of the second frame element. The suspension system includes two springs which operate in the vertical gap between first and second frame elements at the rear of the apparatus.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: September 1, 1998
    Assignee: MTD Products Inc
    Inventors: Al Borling, Axel Schaedler
  • Patent number: 5784867
    Abstract: The present invention provides variable force traction enhance systems for vehicles. The systems include one or more hydraulic cylinders connected to an implement and fluidly connected to one or more hydrostatic transmissions. The hydraulic cylinders actuate the implement in response to changes in the hydraulic fluid pressures in the hydrostatic transmissions. The actuated implement automatically shifts weight to vehicle drive wheels to improve traction and automatically prevents a rear end of the vehicle from bucking.
    Type: Grant
    Filed: October 3, 1995
    Date of Patent: July 28, 1998
    Assignees: Shivvers Incorporated, Douglas McFarland
    Inventors: Douglas McFarland, Donald H. Parkes
  • Patent number: 5771669
    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.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: June 30, 1998
    Assignee: The Toro Company
    Inventors: Thomas F. Langworthy, Herman P. Christopherson, Richard A. Nelson
  • Patent number: 5706639
    Abstract: A lawn mower includes an elongated forwardly open housing having an endless belt entrained therein about a pair of pulleys mounted at opposite ends of the housing. A plurality of C-shaped, channel-like cutting elements are mounted transversely on the outer surface of the belt to cut the lawn as the housing is moved across the lawn on a plurality of rollers. The housing is divided into a plurality of sections which are pivotally interconnected so that the housing sections may pivot relative to each other due to uneven ground. Guide members are provided within the housing to maintain the opposed reaches of the belt parallel to each other during such pivoting of the sections. The cutting elements may also be a plurality of wires embedded in the belt and extending outward from one side of the belt in the plane of the belt.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: January 13, 1998
    Inventor: Donald Metz
  • Patent number: 5613352
    Abstract: An electronic control system for controlling and displaying the status of the location of a combine harvesting head is disclosed herein. The system includes transducers for monitoring the position of the harvesting head relative to the combine, the location of the head relative to the surface upon which the combine is operating, and the force at which the surface is supporting the head. The system also includes a control unit coupled to the transducers and an electronic display located with the operator cab of combine. Depending upon the configuration of the control unit, the control unit samples the transducer signals to apply display signals to the display. In response to the display signals, the display can produce human-readable characters representative of the status of the head as monitored by the transducers.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: March 25, 1997
    Assignee: Case Corporation
    Inventors: Dale W. Panoushek, Jeffery S. Milender
  • Patent number: 5577373
    Abstract: A combine including a harvesting head position control system is disclosed herein. The control system includes a position sensor assembly for producing signals representative of the location of the head relative to the combine, operator control switches, and a controller coupled to the position sensor assembly and the operator control switches. The position sensor assembly preferably includes between 3 or more position transducers located along the harvesting head and a comparison circuit. The comparison circuit selects the signal produced by the sensor associated with the smallest distance between the head and ground, and applies this signal to the controller. Based upon the signal, the controller controls the position of the head.
    Type: Grant
    Filed: June 14, 1995
    Date of Patent: November 26, 1996
    Assignee: Case Corporation
    Inventors: Dale W. Panoushek, James M. Gessel
  • Patent number: 5557913
    Abstract: A lawn mower includes an elongated downwardly open housing having an endless belt entrained therein about a pair of pulleys mounted at opposite ends of the housing. A plurality of C-shaped, channel-like blades are mounted transversely on the outer surface of the belt to cut the lawn as the housing is moved across the lawn on a plurality of rollers. The housing is divided into a plurality of sections which are pivotally interconnected so that the housing sections may pivot relative to each other due to uneven ground. Guide brackets are provided within the housing to maintain the opposed reaches of the belt parallel to each other during such pivoting of the sections.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: September 24, 1996
    Inventor: Donald L. Metz
  • Patent number: 5528891
    Abstract: A traction control device for a lawn mower comprising a pair of lawn gripping assemblies. A facility is for mounting each lawn gripping assembly onto a side of each rear wheel of the lawn mower, so as to prevent the lawn mower from sliding down a steep sloped grade, when cutting grass across it on a lawn.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: June 25, 1996
    Inventor: Zbigniew A. Wzietek
  • Patent number: 5515669
    Abstract: The present invention provides an anti-buck vehicle comprising an engine chassis, an implement pivotally connected to a front end of the engine chassis, and an anti-buck device connecting the engine chassis to the implement to prevent sudden pivotal movement of the engine chassis toward the implement.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: May 14, 1996
    Assignee: The Shivvers Group, Inc.
    Inventors: Scott Schick, Donald H. Parkes
  • Patent number: 5473870
    Abstract: Disclosed herein is a control system for controlling the position of the harvesting implement of an agricultural vehicle. The system includes transducers for monitoring the position of the implement relative to the vehicle, the location of the implement relative to the surface supporting the vehicle, and the force required to support the implement. The system also includes an implement positioning mechanism, a user interface for selecting position, location and force setpoints, and a controller coupled to the transducers, positioning mechanism and user-interface. Based upon the signals produced by the transducers and the setpoints set at the user-interface, the controller controls the positioning mechanism to position the implement.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: December 12, 1995
    Assignee: Case Corporation
    Inventors: Dale W. Panoushek, Jeffrey S. Milender
  • Patent number: 5471824
    Abstract: A trimming apparatus comprising a platform, a plurality of wheels and a plurality of cutters. The platform has a kickback capability and is biased into an operable position, but capable of kicking back when the apparatus contacts rigid obstacles during the trimming operation. The cutting elements include a plurality of flexible blades having a cutting radius larger than the guide disks which are provided to contact obstacle and help the invention be steered around such obstacles. Optional bumpers are provided to further enable the device to "ride over" obstacles and uneven ground terrain. An independent power source such as an electrical or combustible engine having a drive shaft connected to a drive pulley which in turn is interconnected with the cutting elements by a cutter pulley and idler pulley arrangement so as to maintain a desired tension on the drive belt during operation of the device.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: December 5, 1995
    Inventor: George J. Neely
  • Patent number: 5469694
    Abstract: A combine including a harvesting head position control system is disclosed herein. The control system includes a position transducer for producing signals representative of the location of the head relative to the combine, an operator control switch, and a controller coupled to the position transducer and the control switch. The controller controls the raising and lowering of the head by controlling a hydraulic valve which controls the flow of fluid to hydraulic cylinders which raise and lower the harvesting head. More specifically, the controller permits the operator of the combine to momentarily toggle the switch to automatically raise the harvesting head, and monetarily toggle the switch to automatically lower the harvesting head at speeds proportional to the distance between the actual position of the harvesting head and the desired position of the harvesting head.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: November 28, 1995
    Assignee: Case Corporation
    Inventors: Dale W. Panousheck, Jeffrey S. Iilender
  • Patent number: 5465560
    Abstract: An electronic control system for controlling and displaying the status of the location of a combine harvesting head is disclosed herein. The system includes transducers for monitoring the position of the harvesting head relative to the combine, the location of the head relative to the surface upon which the combine is operating, and the force at which the surface is supporting the head. The system also includes a control unit coupled to the transducers and an electronic display located with the operator cab of combine. Depending upon the configuration of the control unit, the control unit samples the transducer signals to apply display signals to the display. In response to the display signals, the display can produce human-readable characters representative of the status of the head as monitored by the transducers.
    Type: Grant
    Filed: June 24, 1994
    Date of Patent: November 14, 1995
    Assignee: Case Corporation
    Inventors: Dale W. Panoushek, Jeffery S. Milender
  • Patent number: 5463853
    Abstract: An improved industrial lawn mower is provided, which consists of a frame having a main cutting unit with large wheels connected to the frame and small wheels connected to the main cutting unit. A pair of auxiliary cutting units are provided, with each having small wheels and extending from an opposite side of the main cutting unit in the frame, to increase the cutting area. A seat assembly having a small wheel extends from the rear of the frame. An engine is in the frame, to supply motive power to the large wheels, the main cutting unit in the frame and the auxiliary cutting units.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: November 7, 1995
    Inventors: Domenico Santoli, George Spector
  • Patent number: 5415586
    Abstract: A header adjusting system for a hillside combine harvester includes a master hydraulic cylinder assembly and a slave hydraulic cylinder assembly. The master hydraulic cylinder assembly is slaved to movement of the wheels relative to the combine frame. The slave hydraulic cylinder assembly is slaved to extension and retraction of the master hydraulic cylinder assembly. The slave hydraulic cylinder assembly causes the header to pivot about the longitudinal axis of the harvester in order to follow the contour of the ground. A header trimming mechanism is also provided to enable direct operator control of some of the pivoting action of the header about the longitudinal axis. A leveling system for a hillside combine harvester includes a cable and a biased, moveable reference pulley associated therewith.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: May 16, 1995
    Assignee: R. A. Hanson Company, Inc.
    Inventors: Raymond A. Hanson, Robert L. Bird, Kenneth A. Pfaff
  • Patent number: 5404695
    Abstract: Forage mower, including at least one module which is connected to a supporting unit provided with a feeding motion by means of a pair of motorized rockers and including a main frame which is pivoted to the rockers and to which two end subframes of a chain of three mutually pivoted subframes are pivoted; each subframe supports a disk that has mowing blades and is rotated by a hydraulic motor supported by the subframe. The main frame is pivoted to the rockers about an axis perpendicular to the direction of feeding motion, while the end subframes are pivoted to the main frame about axes parallel to the direction of feeding motion and the end subframes are also pivoted to the intermediate subframe about axes parallel to the direction of feeding motion.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: April 11, 1995
    Assignee: Costruzione Macchine Agricole Di Gemelli Bruno
    Inventor: Villelmo Gemelli
  • Patent number: 5402628
    Abstract: A mowing machine has a machine frame, front and rear wheels rotatably mounted on the machine frame, a control handle mounted on the machine frame, and a cutting assembly suspended by the machine frame for angular movement about a swing axis extending along a direction in which the mowing machine can travel straight. The front and rear wheels comprise single wheels, respectively, so that the mowing machine is two-wheeled. The machine frame, the front and rear wheels, and the control handle jointly serve as a non-swingable section, and the cutting assembly serves as a swingable section, the swingable section being suspended in offset relationship to the swing axis, the swingable section including a guide member for keeping the cutting assembly spaced from ground. The mowing machine may further include an angular range limiting mechanism for limiting the range of angular movement of the swingable section.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: April 4, 1995
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Takasi Minamoto, Masato Yamagishi, Yuji Furusawa, Akihiko Anbo
  • Patent number: 5375403
    Abstract: The invention relates to a harvester for lowbush berries such as wild blueberries. A truss section is mounted to the three-point hitch of a tractor adapted to run in reverse, the truss section pulling a pair of laterally and longitudinally offset picking heads contained within the periphery of the truss section. The picking heads are floatingly connected to the truss section so that they are free to follow the contours of the ground. Each picking head mounts a rotating, tine-carrying reel therein and is connected to one end of a counterbalance system, the other end of the system being carried by the tractor. The counterbalance system includes counterweights that can be raised or lowered between upper and lower limits at the will of the operator so as to offset the weight of the picking head, so that as little as 25% thereof is acting on the ground. This means that there will be little damage to the picking head if it encounters obstacles such as rocks or tree stumps during harvesting.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: December 27, 1994
    Assignee: Collins Border Holdings Ltd.
    Inventors: George E. Collins, John E. Collins, Michael G. Collins
  • Patent number: 5367864
    Abstract: A riding lawn mower having a mower unit suspended from a chassis frame through a link mechanism. A driver's seat supporting auxiliary frame is provided, which includes a foot rest, a seat mount and right and left rear wheel fenders formed integral with one another. The auxiliary frame has a forward end portion thereof supported by the chassis frame to be pivotable about a cross pin, and a rear end portion supported by the chassis frame through a suspension mechanism. The cross pin is disposed adjacent a shift pedal and a brake pedal, while the suspension mechanism is disposed below the driver's seat.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: November 29, 1994
    Assignee: Kubota Corporation
    Inventors: Hiroyuki Ogasawara, Nobuyuki Yamashita, Akira Minoura
  • Patent number: 5361566
    Abstract: A belt drive mechanism for transmitting power from a vehicle's power source to a mower deck vertically shiftably coupled with the vehicle, and having a primary belt driven by an output sheave coupled with the vehicle power source, a double pulley jacksheave driven by the primary belt, and a secondary belt driven by the jacksheave and operatively engaged with mower deck sheaves which drive mower blades within the mower deck. A support member extends between the mower deck and the vehicle for supporting the jacksheave, the support member being pivotal with respect to both the mower deck and the vehicle for shifting the position of the jacksheave to a position vertically between the output sheive and the mower deck sheaves as the mower deck shifts vertically. The jacksheave pivots with the support member to assume a tilted position when the mower deck is shifted vertically.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: November 8, 1994
    Assignee: Deere & Company
    Inventor: Gary D. Hohnl
  • Patent number: 5359837
    Abstract: An hydraulic elevating mechanism for lifting and lowering an engineering structure which is sluingly supported around a rotational axis on a base unit, has two or more hydraulic lift cylinders pivoted to the base unit at one end and to the engineering structure to be slued at the other. The lift cylinders are controlled by hydraulic control circuits separated from each other and such that at least one of the lift cylinders is connected to a pressure reservoir.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: November 1, 1994
    Inventors: Gustav Schumacher, Guenter Schumacher
  • Patent number: 5355664
    Abstract: A rotary mower (22) having an improved castering wheel assembly (39, 92) so as to reduce rotation of the castering wheel (4) about its support shaft (6). In one embodiment, a torsion resistance mechanism (2) is interposed between the shaft (3) and mower frame (67), the torsion resistance mechanism (2) including a resilient material (46) rigidly bonded to a sleeve (77) in which the shaft (3) is retained. The resilient material (46) is press fit into a housing (11), the housing (11) being rigidly bonded to the mower frame (67). In another embodiment, a cap (98) housing a spring (102) is threadably attached to the castering wheel support shaft (81). Rotation of the cap (98) compresses spacers (85-90) mounted co-axially on the shaft (81) while urging the shaft (81) in an upward direction (111) so as to prevent axial rotation of the shaft (81) when the castering wheel loses contact with the ground.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: October 18, 1994
    Assignee: The Toro Company
    Inventor: Michael N. Zenner
  • Patent number: 5341629
    Abstract: A mobile mower apparatus comprises a mower boom which is pivotally connected to a mobile vehicle for lateral extension therefrom. A mower frame is suspended from the boom. The mower frame has two frame sections which are connected to each other to allow the frame sections to pivot relative to each other about a generally horizontal pivot axis. A mower blade is mounted on each of the frame sections for relative pivotal motion corresponding to the motion of the frame sections. A hydraulic cylinder is connected to the mower frame to allow a human operator to control the relative angular positions of the first and second frame sections while mowing. The mower blades defining cutting lines which approximately intersect the pivot axis.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: August 30, 1994
    Inventor: Erich R. Penner
  • Patent number: 5305590
    Abstract: An agricultural rake especially designed for gathering wide swaths of agricultural field crops into windrows prior to baling is provided. The rake includes a primary frame, a pair of secondary rake frames pivotally and shiftably mounted to the primary frame, and a plurality or bank of radially-tined wheel rakes supported by the secondary frames. The secondary rake frames are free to pivot in a plane perpendicular to the direction of travel to prevent undo stress on the frames. Both the angle of deployment of the secondary frames as well as the distance between the frames is adjustable to accommodate different swath widths and windrow sizes. A unique rake suspension assembly provides for the easy shifting of the rake bases between the raking and transport positions while providing for desired tensioning of the rakes during raking operations and elevating the rake frames during transport. In an embodiment, castors are included to support the rake suspension assembly.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: April 26, 1994
    Assignee: H & S Manufacturing Co., Inc.
    Inventor: Kenneth J. Peeters
  • Patent number: 5241809
    Abstract: A cutting machine (1) intended to be coupled to a motor vehicle (2) includes a draw spring (59) and a locking element (28) to lock the pivoting of a support beam (5) relative to a hitching structure (4) around an axis (11A) of a first journal (11) during transport, and whose action is cancelled during work and set down.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: September 7, 1993
    Assignee: Kuhn S.A.
    Inventors: Michel Wolff, Horst Neuerburg
  • Patent number: 5138819
    Abstract: A sugar cane harvester has a base cutter elevation control system that compensates for changes in terrain such as ruts, small hills, etc. by raising or lowering the base cutter. A forwardly positioned slipper assembly gives feedback as to upcoming changes in terrain. A sensor also monitors tire position as when the harvester sinks into soft spots, muddy spots and the like wherein base cutter position is adjusted to compensate for sinkage of the tires.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: August 18, 1992
    Assignee: Cameco Industries, Inc.
    Inventor: Robert T. Andre
  • Patent number: 5133174
    Abstract: A mower is propelled along the ground by a tractor and the mower includes three cutting units mounted on a frame. The three cutting units are transversely mounted on the frame to cut in overlapping parallel patterns with each cutting unit being free floating on the frame such that each unit cuts at an elevation controlled by the ground immediately under the cutting unit.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: July 28, 1992
    Inventor: Ralph L. Parsons, Jr.
  • Patent number: 5115628
    Abstract: An improved height control system for adjusting the elevation of a harvesting unit supportd for vertical movement on a cotton harvester. The height control system includes a signal receiving apparatus movable within a range of movement and arranged in combination with a lift mechanism for adjusting the elevation of the harvesting unit. A signal transmitting mechanism carried on the harvesting unit for ground engagement is connected to the signal receiving apparatus for causing the lift mechanism to effect harvesting unit elevation correlated with vertical movement of the signal transmitting mechanism relative to the harvesting unit. A linkage assembly interconnects the signal receiving apparatus and signal transmitting mechanism.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: May 26, 1992
    Assignee: J. I. Case Company
    Inventors: Lee F. Garter, G. Neil Thedford
  • Patent number: 5111636
    Abstract: This invention relates to a haymaking machine which includes a frame having a central section and three lateral sections which are connected to one another and which carry rotors rotatably driven during working operation. The lateral sections can be folded for transport by hydraulic cylinders. On each side of central section there are located the three lateral sections, each of which includes a pipe and a housing equipped with a rotor. A hydraulic cylinder extends directly from the central section to each third lateral section and in the transporting position, the first and second lateral sections are directed upward and the third lateral sections are directed downward.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: May 12, 1992
    Assignee: Kuhn S.A.
    Inventor: Michel Quirin
  • Patent number: 5109655
    Abstract: A gang mower assembly comprising a rigid frame elongated in the direction of forward movement of the assembly, the frame including a forward end portion, a central portion, and a trailing end portion. A central rotary mower deck is disposed adjacent the central portion and a universal joint for connecting the central deck to the central portion for at least limited universal movement relative to the frame about axes generally parallel to the frame and generally perpendicular to the frame is provided. The assembly further comprises at least one outboard rotary mower deck and at least one inboard rotary mower deck, and ground-engaging wheels for individually supporting each deck for independent movement relative to the frame. Each of the decks comprises a rotary blade assembly defining a centrally located, upwardly extending rotary axis and pulleys mounted on the axis to provide an input drive for the blade assembly.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: May 5, 1992
    Inventor: Daniel R. Tekulve
  • Patent number: 5107663
    Abstract: A farm machine comprises at least one group of working elements and a structure having a hitching mechanism for hitching the farm machine to a motor vehicle during work. The group of working elements is connected to the structure which comprises a tongue (hitching mechanism), and a frame through a deformable quadrilateral suspension device which comprises suspension elements each one of which is connected to the structure through a first joint and to the group of working elements through a second joint.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: April 28, 1992
    Assignee: Kuhn s.a.
    Inventors: Bernard Wattron, Roland Helfer
  • Patent number: 5090184
    Abstract: A system for controlling the elevation of a harvesting unit of a cotton harvester relative to a ground surface. The control system includes a valve assembly whose position controls operation of a lift mechanism connected to the harvesting unit and which is operated by a ground contour sensor assembly carried by the harvesting unit. Harvesting unit elevation is correlated with the extent that the ground contour sensor assembly moves relative to the harvesting unit. The ground contour sensor assembly includes a shoe with a ground engaging surface wherein such surface is movable vertically relative to the harvesting unit and also is pivotable sideways about a fore-and-aft extending axis thereby enhancing ground contact of the sensor assembly with the ground contour.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: February 25, 1992
    Assignee: J. I. Case Company
    Inventors: Lee F. Garter, Jesse H. Orsborn, Kevin S. Richman, Joel Soto
  • Patent number: 5085042
    Abstract: A riding mower includes a frame, front steering wheel, two rear wheels and two mower blade housings located laterally relative to the frame with blades located within the housings. Telescoping drive shafts extend generally longitudinally from a belt drive mechanism located at a rearward end of the frame to the blade housings to drive each of the blades within the housings. Hydraulic cylinder assemblies and a leveling system are provided to pivot the frame with respect to the rear wheels and about a longitudinal axis in response to changes in slope of the surrounding terrain, maintaining the frame in a generally upright orientation. The telescoping drive shafts extend and retract in response to the angular movement of the frame with respect to the blade housings that remain close to the ground surface.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: February 4, 1992
    Assignee: DewEze Manufacturing, Inc.
    Inventor: David L. Lansdowne
  • Patent number: 5060462
    Abstract: A mower includes a frame having a connecting mechanism for connecting the frame to a motor vehicle. The mower also includes at least one harvesting mechanism which comprises cutting elements and is connected to the frame through a suspension device. The suspension device permits the displacement in height of the harvesting mechanism relative to the frame. The mower further includes a lightening device operatively connected to the harvesting mechanism and comprising at least one spring connected directly to the harvesting mechanism. The lightening device makes it possible to reduce the pressure with which the harvesting mechanism rests on the ground by transferring a part of the weight of the harvesting mechanism to the frame.
    Type: Grant
    Filed: November 26, 1990
    Date of Patent: October 29, 1991
    Assignee: Kuhn S.A.
    Inventors: Roland Helfer, Bernard Wattron
  • Patent number: 5031389
    Abstract: A construction having two separately operable mowers driven by a single tractor unit. The tractor drives our double gear box, which is operably connected to drive two laterally spaced separate gear boxes, each of which drives grass cutting blades. Each of the two mowers has four wheels at the rear to permit elevating or lowering the grass cutting blade to control the degree of cut. With this construction it is possible to cut the grass regardless of the elevation of the grass. One of the units can be mowing the grass on a horizontal portion of a bed, while the other unit is operating on the slope of one of the beds. It is also readily possible to mow the grass at the bottom of the v shaped area between two beds.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: July 16, 1991
    Inventors: Valda E. Yawn, Patricia Yawn
  • Patent number: 5024053
    Abstract: An agricultural machine comprises a frame which is adapted to be hooked to a drive tractor and carries at least one rotor equipped with work tools controlled by a central cam to move products such as hay which are on the ground. The rotor is connected to the frame by a pin which is positioned substantially perpendicular to the direction of advance of the machine and comprises a central support pin on which carrying wheels are connected. The agricultural machine further comprises an actuating mechanism positioned between the frame and the rotor of the machine which acts on the rotor to pivot the rotor around its hinge pin. With this arrangement, a partial load transfer from the front wheels onto the rear wheels or wheels can be obtained and the agricultural machine can adapt to the unevenness of the ground as well as clear all obstacles.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: June 18, 1991
    Assignee: Kuhn S.A.
    Inventor: M. Jerome Aron
  • Patent number: 5005342
    Abstract: An auger cutter, windrower and conditioner for standing crops such as hay, a cutter and a feed mechanism for feeding forage harvesters crops such as corn and sorghum, including a cutter auger with cutting teeth attached to the auger flight and a conveyor auger to move the cut crop to a central area to be discharged as a window or as a mass of material to be fed to a second crop processing device such as a forage harvester.
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: April 9, 1991
    Assignee: Ezra C. Lundahl, Inc.
    Inventors: E. Cordell Lundahl, Laurel H. Jensen
  • Patent number: 4998948
    Abstract: A lawn mower comprises a riding and a steering frame pivotally connected to an engine and cutter assembly which includes an engine and transmission mounted on an engine deck and cutter blades driven by the engine and mounted below the cutter deck. The steering frame is pivotally attached to the engine deck and supports a rider seat and a steering assembly. A shock absorber extends between the pivotally connected engine and riding and steering frame.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: March 12, 1991
    Assignee: Scag Power Equipment, Inc.
    Inventor: Lloyd A. Osterling
  • Patent number: 4993216
    Abstract: A system for mounting and supporting cotton harvesting units for vertical displacement on a forward end of a cotton harvester frame. The mounting and supporting system includes a parallelogram-type linkage assembly for connecting the harvesting units to the frame such that the harvesting units maintain a generally level attitude in either lowered or raised positions. The linkage assembly includes vertically spaced and generally parallel lift arms and tension arms. Each lift arm and tension arm is pivotally attached at its rear end to the frame and at its forward end to the harvesting units. A tilting mechanism connects the rear end of the tension arms to the frame and is operable to move the harvesting units about their pivot attachment to the lift arm to a tilted position and thereby facilitate an increase in ground clearance for the cotton harvester.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: February 19, 1991
    Assignee: J. I. Case Company
    Inventors: Michael J. Covington, G. Neil Thedford, Jesse H. Orsborn