Draft Responsive Patents (Class 172/7)
  • Patent number: 10405478
    Abstract: An agricultural implement including a frame, a hydraulic system, a controller and a plurality of sensors. The hydraulic system is coupled to the frame and has a plurality of hydraulic actuators fluidically coupled in a series arrangement. The controller is in control of the hydraulic system. The plurality of sensors have at least one sensor coupled to each of the plurality of hydraulic actuators. The sensors are in communication with the controller, with the controller executing the steps of receiving at least one signal from the sensors indicating a need to rephase the hydraulic actuators; and operating the hydraulic system to rephase the hydraulic actuators dependent upon the signal.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: September 10, 2019
    Assignee: CNH Industrial Canada, Ltd.
    Inventor: James W. Henry
  • Patent number: 10294630
    Abstract: In one aspect, a method for creating a final graded soil surface may include controlling an operation of a grading implement of a work vehicle such that the grading implement removes a layer of soil from a current soil surface as the work vehicle is moved in a forward direction. The method may also include receiving an input indicative of the current soil surface being at an offset soil depth relative to the initial ungraded soil surface, with the offset soil depth differing from the final soil depth. When the current soil surface is at the offset soil depth, the method may further include adjusting a position of the grading implement to add or remove soil based on a depth differential defined between the offset soil depth and the final soil depth to create the final graded soil surface as the work vehicle is moved in the reverse direction.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 21, 2019
    Assignee: CNH Industrial America LLC
    Inventor: Scott Andrew Elkins
  • Patent number: 10293874
    Abstract: A working vehicle has a ballast weight system including a fulcrum mounted on the vehicle frame and a ballast weight configured to pivot between a mounting configuration with the ballast weight is resting on the ground and an operational configuration with the ballast weight is carried by the vehicle frame. The ballast weight has a mounting arm and a lower corner portion. The mounting arm has a recess configured to interact with the fulcrum, wherein in the mounting configuration, the recess faces sideways such that the work vehicle is driven towards the ballast weight until the fulcrum interfaces with the recess. A catch mechanism secures the ballast weight to the fulcrum. A lift mechanism attaches between the ballast weight and the vehicle frame such that the lift mechanism pushes on the corner portion to pivot the ballast weight about the fulcrum. A latch mechanism pins the ballast weight in the operational position.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: May 21, 2019
    Assignee: AGCO Corporation
    Inventors: Evan Thomas Smith, Derek Hruska
  • Patent number: 10172273
    Abstract: A vehicle control system for controlling the height of a linkage on a vehicle having a continuously variable transmission (CVT) in which the linkage is automatically raised and lowered depending on a draft force detected by the vehicle including an input draft force detected by sensors in the CVT or driveline is inputted into the control system and the system further processes the input draft force to provide an output draft force upon which movement of the linkage is based and the control system processes the input draft force by compensating the input draft force detected during acceleration or deceleration and/or compensating the input draft detected whilst travelling along a slope, and/or equalizing the input draft force by applying a ramp function, and/or reducing the input draft force when the linkage is at a predetermined height.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: January 8, 2019
    Assignee: AGCO International GmbH
    Inventors: Christian Gschwendtner, Guenther Ostenried, Werner Unsinn
  • Patent number: 9980422
    Abstract: A system includes an agricultural implement, a sensor, and a control system. The agricultural implement is configured to be coupled to an agricultural vehicle. The sensor is coupled to the agricultural implement and configured to output a signal indicative of a pitch angle of the agricultural implement. The control system is configured to receive the signal indicative of the pitch angle from the sensor, determine whether the pitch angle is within a pitch angle range, generate a hitch height control signal indicative of instructions to adjust a hitch actuator if the pitch angle is not within the pitch angle range, and communicate the hitch height control signal.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: May 29, 2018
    Assignee: CNH Industrial America LLC
    Inventors: Jason Czapka, Keith Walter Wendte
  • Patent number: 9883622
    Abstract: A tractor control system, which controls an operating condition of an implement attached to the tractor. The control system includes a sensing means providing a force signal which indicates the pull force necessary to pull an implement in a desired position; a control which receives the force signal; and means for measuring at least one parameter associated with the tractor mode and/or the implement mode and the implement position is adjusted to a new position when the force signal varies. The control system includes pre-determined values associated with certain tractor and/or implement modes. A measured parameter is compared with a pre-determined parameter value and if the measured parameter would result in an undesired movement of the implement, the force signal is deactivated, or the response to the force signal is deactivated to prevent undesired movement of the attachment.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: February 6, 2018
    Assignee: AGCO International GmbH
    Inventors: Christian Gschwendtner, Guenther Ostenried, Ulrich Stich, Werner Unsinn
  • Patent number: 9845101
    Abstract: A pushcart includes a left wheel, a right wheel, a left wheel driver, a right wheel driver, a control unit, a left wheel rotary encoder, and a right wheel rotary encoder. The left wheel driver rotates the left wheel. The right wheel driver rotates the right wheel. The left wheel rotary encoder detects a rotational angle of the left wheel. The right wheel rotary encoder detects a rotational angle of the right wheel. The pushcart performs feedback control on angular velocities of the left wheel and the right wheel at least using an integral operation. The control unit calculates a weighted average of an integral element with respect to the angular velocity of the left wheel and an integral element with respect to the angular velocity of the right wheel, and then separately controls the left wheel driver and the right wheel driver based on the weighted average.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: December 19, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Takanori Hayashi
  • Patent number: 9815471
    Abstract: A work vehicle is equipped with an engine, a hydraulic pump, a work implement, a travel device, an accelerator operating member, a work implement operating member, and a control unit. The hydraulic pump is driven by the engine. The work implement is driven by hydraulic fluid discharged from the hydraulic pump. The travel device is driven by the engine. The accelerator operating member changes the engine rotation speed. The work implement operating member operates the work implement. The control unit causes the speed of the work implement to increase by causing the engine rotation speed to increase when an operation amount of the work implement operating member is increased.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: November 14, 2017
    Assignee: KOMATSU LTD.
    Inventors: Masao Yoshizawa, Shunsuke Miyamoto, Kenichi Yamada
  • Patent number: 9790663
    Abstract: A work vehicle is equipped with an engine, a hydraulic pump, a work implement, a work implement operating member, a work implement control valve, a capacity control device, a travel device, an accelerator operating member, and a control unit. The hydraulic pump is driven by the engine. The work implement is driven by hydraulic fluid discharged from the hydraulic pump. The work implement control valve controls the hydraulic pressure supplied to the work implement. The capacity control device controls a differential pressure between a discharge pressure of the hydraulic pump and an outlet hydraulic pressure of the work implement control valve. The travel device is driven by the engine. The accelerator operating member changes the engine rotation speed. The control unit causes the speed of the work implement to increase by causing the engine rotation speed to increase when an operation amount of the work implement operating member is increased.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 17, 2017
    Assignee: KOMATSU LTD.
    Inventors: Masao Yoshizawa, Shunsuke Miyamoto, Kenichi Yamada
  • Patent number: 9505140
    Abstract: A robot includes a body and a bumper. The body is movable relative to a surface and includes a first portion of a sensor. The bumper is mounted on the body and movable relative to the body and includes a backing and a second portion of the sensor. The backing is movable relative to the body in response to a force applied to the bumper. The second portion of the sensor is attached to the backing and movable with the backing relative to the first portion of the sensor in response to a force applied to the bumper. The sensor is configured to output an electrical signal in response to a movement of the backing. The electrical signal is proportional to an amount of displacement of the second portion relative to the first portion.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: November 29, 2016
    Assignee: iRobot Corporation
    Inventors: Victor Fay, Seth Blitzblau, Samuel Duffley, Kyle Dumont, Justin H. Woodman
  • Patent number: 9347844
    Abstract: A draft sensing mechanism for a three point hitch includes a hitch frame attached to a frame of a vehicle. The hitch frame includes left and right link supports for coupling to left and right draft links and left and right draft bars. Each draft bar has a first portion attached to a corresponding one of the link supports, and a second portion positioned rearwardly and inwardly with respect to its first portion. Draft forces applied by the draft links to the link supports are transmitted to the second portions of the draft bars. A linkage unit sums the draft forces from the draft bars and includes a draft force transducer which generates a draft force signal in response to deflection of the draft bars.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: May 24, 2016
    Assignee: DEERE & COMPANY
    Inventors: Andrew M. Tilkes, Benjamin J. Heimbuch, Edwin R. Kreis, Mark S. Earley, Dennis A. Bowman, Jonathan T. Roth, Douglas R. Fischer, Michael D. Kollath
  • Patent number: 9199616
    Abstract: The disclosure describes, in one aspect, a method for determining a machine ground speed. The method includes determining a first speed from a position determining system, determining a direction the machine is traveling at the first speed, determining a machine rate of inclination, and determining a compensated ground speed as a function of the first speed and the machine rate of inclination.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: December 1, 2015
    Assignee: Caterpillar Inc.
    Inventors: Nathaniel Doy, Erik Eddington, Eric Dishman, Robert Shockency
  • Patent number: 9200426
    Abstract: A blade control system includes an angle obtaining part, an open ratio setting part and a lift cylinder controlling part. The angle obtaining part is configured to obtain an angle of a lift frame with respect to a designed surface. The open ratio setting part is configured to set an open ratio based on the angle. The lift cylinder controlling part is configured to open a proportional control valve at the open ratio for elevating the blade when a distance between the designed surface and an edge of a blade is determined to be less than or equal to a threshold.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: December 1, 2015
    Assignee: KOMATSU LTD.
    Inventors: Kazuhiko Hayashi, Kenji Okamoto, Kenjiro Shimada
  • Patent number: 9185838
    Abstract: A pull-type crop engaging machine such as a rotary mower comprises a frame mounted on transversely spaced field ground wheels for movement with a hitch arm extending to a tractor and a transport assembly attached behind the frame for moving downwardly to a transport position so that in the transport position the hitch arm extends from one end of the frame generally in the transverse direction for towing the machine in the transverse direction. The transport includes a transport ground wheel which acts to raise the frame to pass underneath the crop engaging system to support the machine on the wheel, on a second wheel behind the frame and on the hitch. The movement of the hitch and the wheel is connected and started at a position of the hitch so that the machine remains balanced. A shield behind the frame includes a portion which moves with the transport wheel.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: November 17, 2015
    Assignees: Macdon Industries Ltd., Maschinenfabrik Bernard Krone GmbH
    Inventors: Ricky Chan, Neil Gordon Barnett, Geoffrey U. Snider, Andreas Afting
  • Patent number: 9066465
    Abstract: A soil compaction reduction system and method determine a path through the field for a mobile machine or control a soil compaction characteristic of the mobile machine based upon a varying soil compaction characteristic of the mobile machine as the mobile machine traverses the field and based upon a soil compaction constraint.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: June 30, 2015
    Assignee: Deere & Company
    Inventors: Larry L. Hendrickson, Noel W. Anderson
  • Patent number: 9033062
    Abstract: A control system for a machine is disclosed. The system includes a ripper sensor associated with a ripper of the machine configured to generate a signal indicative of a position of the ripper. The system includes a steering command sensor associated with a steering control module of the machine. The steering command sensor is configured to generate a signal indicative of a steering command of the machine. The system further includes a controller configured to receive the signals indicative of the position of the ripper and the steering command of the machine. The controller is configured to execute an action based on the engaged state of the ripper and the steering command of the machine.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: May 19, 2015
    Assignee: Caterpillar Inc.
    Inventors: Kenneth L. Stratton, Kimberly N. Stratton, Troy K. Becicka
  • Patent number: 8924102
    Abstract: A dynamic supplemental downforce control system for a planter row unit. The system includes closed-loop feedback circuit that cooperates with a downforce actuator to dynamically control fluid flow to the downforce actuator to maintain balance between the actual gauge wheel downforce and a desired gauge wheel downforce during planting operations.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: December 30, 2014
    Assignee: Precision Planting LLC
    Inventors: Derek A. Sauder, Jeremy J. Hodel
  • Patent number: 8700270
    Abstract: A system and method is provided for determining the magnitude and direction of the draft force applied to the drawbar of a tractor by a towed implement. Orthogonal load sensors can be placed at the drawbar pivot point to measure load on the drawbar. From the measured load on the drawbar, the lateral and longitudinal draft forces applied by the towed implement on the drawbar can be calculated. The magnitude and direction of the draft force can then be determined from the calculated lateral and longitudinal forces.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: April 15, 2014
    Assignee: CNH America LLC
    Inventors: Christopher A. Foster, Kevin M. Smith
  • Patent number: 8668024
    Abstract: A system for correcting skewing in an agricultural implement where the implement includes a plurality of ground engaging tools laterally spaced across a width of the implement and operative to selectively engage the ground to perform a desired operation on a field surface has a skew detecting device operative to sense when the implement is travelling in a skewed orientation and send a correction signal indicating the skewed orientation to a correction mechanism. A drag force is exerted on the ground engaging tools by engagement with the ground when performing the desired operation on the field surface, and the correction mechanism is operative to change the drag forces exerted on at least some ground engaging tools on one side of the implement to correct the skewed orientation.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: March 11, 2014
    Assignee: Straw Track Manufacturing Inc.
    Inventor: Norbert Beaujot
  • Patent number: 8634992
    Abstract: A dynamic supplemental downforce control system for a planter row unit. The system includes closed-loop feedback circuit that cooperates with a downforce actuator to dynamically control fluid flow to the downforce actuator to maintain balance between the actual gauge wheel downforce and a desired gauge wheel downforce during planting operations.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: January 21, 2014
    Assignee: Precision Planting LLC
    Inventors: Derek A. Sauder, Jeremy J. Hodel
  • Patent number: 8549828
    Abstract: A harvesting system is provided that includes a primary harvester for harvesting grain and biomass, a biomass harvester for further processing the biomass, and a tugger and accumulator coupled between the primary harvester and the biomass harvester. The tugger and accumulator includes an onboard power plant and an onboard propulsion system.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: October 8, 2013
    Assignee: Deere & Company
    Inventor: John David Burger
  • Publication number: 20130192854
    Abstract: A draft sensing mechanism includes a draft frame adapted to be attached to a frame of a vehicle. The draft frame has left and right supports adapted to be coupled to corresponding left and right draft links. A draft strap has a left end fixed to a front side of the left support and a right end fixed to a front side of the right support. The draft strap is deflectable in response to draft forces applied to the left and right supports. A draft sensor is attached to the draft strap. The sensor generates a draft signal in response to deflection of the draft strap.
    Type: Application
    Filed: February 1, 2012
    Publication date: August 1, 2013
    Inventors: PETER A. KOSMICKI, Benjamin J. Heimuch, Mark S. Earley, Edwin R. Kreis, Andrew M. Tilkes
  • Patent number: 8496068
    Abstract: A draft sensing mechanism includes a draft frame adapted to be attached to a frame of a vehicle. The draft frame has left and right supports adapted to be coupled to corresponding left and right draft links. A draft strap has a left end fixed to a front side of the left support and a right end fixed to a front side of the right support. The draft strap is deflectable in response to draft forces applied to the left and right supports. A draft sensor is attached to the draft strap. The sensor generates a draft signal in response to deflection of the draft strap.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: July 30, 2013
    Assignee: Deere & Company
    Inventors: Peter A. Kosmicki, Benjamin J. Heimbuch, Mark S. Earley, Edwin R. Kreis, Andrew M. Tilkes
  • Patent number: 8494727
    Abstract: In order to achieve a solution which assists a farmer in working land in a way which reduces the risk of soil compaction of the land there is, among others, a method of determining a work trajectory to be followed by an agricultural work vehicle. The method includes accessing a soil carry capacity map of an area of land to be worked by the agricultural work vehicle, receiving load data of the agricultural work vehicle so as to determine the agricultural work vehicle load and determining the work trajectory to be followed by the agricultural work vehicle. The work trajectory is determined by correlating the soil carry capacity map and the load data of the agricultural work vehicle, so as to optimize that the area to be worked with low carry capacity is worked with low agricultural work vehicle load.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: July 23, 2013
    Assignee: Aarhus Universitet
    Inventors: Ole Green, Dionysios D. Bochtis
  • Patent number: 8453754
    Abstract: A system for correcting skewing in an agricultural implement where the implement includes a plurality of ground engaging tools laterally spaced across a width of the implement and operative to selectively engage the ground to perform a desired operation on a field surface has a skew detecting device operative to sense when the implement is travelling in a skewed orientation and send a correction signal indicating the skewed orientation to a correction mechanism. A drag force is exerted on the ground engaging tools by engagement with the ground when performing the desired operation on the field surface, and the correction mechanism is operative to change the drag forces exerted on at least some ground engaging tools on one side of the implement to correct the skewed orientation.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: June 4, 2013
    Assignee: Straw Track Manufacturing Inc.
    Inventor: Norbert Beaujot
  • Patent number: 8418776
    Abstract: A control system for an implement (10) mounted on a tractor (11) via a three point linkage (10) and which has one or more depth control wheels (13) which contact the ground and which support at least part of the weight of the implement. The three point linkage has an upper link (17) and two lower links (14, 15), the upper link including an adjusting means such as an hydraulic cylinder (18) to vary its effective length and the lower links being provided with raising means (16) to raise the implement. The control system has a control unit (23) which received signals indicative of the level of slippage of one or more wheels of the tractor and which in response to a wheel slippage level above a first level (X) operates the adjusting means (18) to shorten the effective length of the upper link (17) to transfer some of the weight of the implement (10) onto the tractor to reduce wheel slippage.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: April 16, 2013
    Assignee: AGCO SA
    Inventor: Jacques Pirotais
  • Patent number: 8406966
    Abstract: The hitch on a vehicle is moved by a hydraulic actuator. A method for controlling the hydraulic actuator defines a draft force setpoint in response to separately averaging two forces acting on lateral sides of the hitch, while operating in a configuration mode. During regular operation, a draft load is calculated from sensing those two forces and deriving a draft force error from difference between the draft load and the draft force setpoint. The draft force error is used to control fluid flow to and from the hydraulic actuator. One aspect of the control method derates the draft force error as the hitch moves beyond a predefined threshold position.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: March 26, 2013
    Assignee: HUSCO International, Inc.
    Inventors: David James Schedgick, Eric N. Griesbach
  • Patent number: 8296019
    Abstract: A control system for a mobile excavation machine is disclosed. The control system may include a ground engaging work tool, a sensor, and a controller. The sensor may be configured to sense a parameter indicative of a current travel speed of the mobile excavation machine and generate a speed signal in response thereto. The controller may be in communication with the ground engaging work tool and the sensor, and configured to receive the signal. The controller may also be configured to determine a cutting depth of the ground engaging work tool into a material and calculate a current productivity value associated with removal of the material based on the speed signal and the determined cutting depth. The controller may be further configured to control the ground engaging work tool to vary the amount of material currently being removed in response to the current productivity value.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: October 23, 2012
    Assignee: Caterpillar Inc.
    Inventor: Larry Ellis Kendrick
  • Patent number: 8083004
    Abstract: A control system for a machine having a power source, a traction device, and a ripping tool is disclosed. The control system may have a slip sensor configured to generate at least one signal indicative of machine slippage, and at least one actuator operable to position the ripping tool. The control system may also have a controller in communication with the slip sensor, the at least one actuator, and the power source. The controller may be configured to receive at least one operator input indicative of an acceptable slip value, and determine actual machine slippage based on the at least one signal. The controller may also be configured to directly and separately regulate a speed of the machine and a position of the ripping tool during an excavation process based on the acceptable slip value and actual machine slippage.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: December 27, 2011
    Assignee: Caterpillar Inc.
    Inventor: Robert Paul Knight, Jr.
  • Patent number: 7954556
    Abstract: A draft load control system for an agricultural tractor having electronic engine and draft load controllers interconnected by a digital communications bus over which parameters for engine load are made readily available to the draft load controller. The draft load control system is suitable for front-mounted, rear-mounted, or towed implements without requiring additional sensing equipment.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: June 7, 2011
    Assignee: CNH America LLC
    Inventors: Yanming Hou, Haibo Guo
  • Patent number: 7930843
    Abstract: A system and process for controlling propulsion and steering of a track trencher excavation machine powered by an engine includes a multiple mode propulsion and steering control system that performs a plurality of functions depending on a selection of one of a plurality of operational modes. A controller generates a vehicle propulsion hydrostatic drive signal optionally using a track drive hydraulic pressure or a track drive speed as a variable for modifying the propulsion drive signal. The controller optionally uses a hydraulic attachment drive pressure as a variable for further modifying the propulsion drive signal.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: April 26, 2011
    Assignee: Vermeer Manufacturing Company
    Inventor: Ty Hartwick
  • Patent number: 7798241
    Abstract: A mechanical hitch control system for a vehicle includes a draft force sensing member, a mechanical hitch control unit, a hitch valve actuator, and a cable transmitting a draft force signal to the hitch control unit. A draft cam is coupled to the draft force sensing and setting members. A position cam is coupled to the position setting member and to a hitch position sensing member. A draft pickup cam is coupled to the draft cam and pivotally mounted on the hitch position setting member. At least one of the cams is operatively engagable with the hitch valve actuator. The cams are enclosed by housing with an opening covered by a removable side plate. The cams and levers are coupled to input members which are inserted through the side plate. The assembled cams, levers and input members are then installed into the housing through the opening.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: September 21, 2010
    Assignee: Deere & Company
    Inventors: Norman Everett Muzzy, David Leo Sigl, Shawn Robert Simons, Jesse Ray Knight
  • Patent number: 7721813
    Abstract: A draft load control system for a primary motive power source that uses hitch cylinder pressure to provide input to the control system of the draft load on the power source caused by a hitch-connected or a towed, ground-engaging implement.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: May 25, 2010
    Assignee: CNH America LLC
    Inventor: Yanming Hou
  • Publication number: 20100084147
    Abstract: An automatic control system for passive, towed implements is described. The system provides a strategy for optimal control of a towed implement using a nudge input to an autopilot-controlled tractor. Implement path-tracking error, as measured by a GNSS receiver, is consistently corrected to zero.
    Type: Application
    Filed: October 2, 2008
    Publication date: April 8, 2010
    Applicant: Trimble Navigation Ltd.
    Inventor: Gurcan Aral
  • Patent number: 7677323
    Abstract: System and method for automatically adjusting control gains on an earthmoving machine include a control system for controlling mechanisms that supply power to an earthmoving implement. The gains associated with the force to the implement are automatically adjusted depending on a blade load that may be determined by a calculation of torque attributable to a blade load. The control gains include a proportional gain and a derivative gain that may be used to determine a control effort lift command associated with the control gains for supplying an appropriate gain to the mechanisms that control the implement.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: March 16, 2010
    Assignee: Caterpillar Trimble Control Technologies LLC
    Inventors: Kenneth Lee Stratton, Randall Dean Pruitt
  • Patent number: 7658234
    Abstract: A method of increasing efficiency and avoiding or reducing potential stall conditions is accomplished by configuring a ripper of a track type tractor responsive to a net force vector acting on the ripper. The net force vector is indicative of the various forces and pressures acting on the ripper, and the values indicative of these forces can be sensed. For instance, the force and value indicative of the force magnitude can be sensed by monitoring driveline torque, whereas the force vector angle can be derived from ripper tilt and lift actuator pressures. The ripper is configured responsive to the force vector magnitude and direction either via a control algorithm, or by inputs generated by an operator.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: February 9, 2010
    Assignee: Caterpillar Inc.
    Inventors: Everett G. Brandt, Andrew G. Shull
  • Patent number: 7588089
    Abstract: A theorem and method for determining the weight and center of gravity of a ground-engaging implement connected to a three-point hitch on an agricultural tractor or other prime mover using hitch cylinder pressure and hitch position as calibration inputs to a hitch control system.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 15, 2009
    Assignee: CNH America LLC
    Inventors: Haibo Guo, Yanming Hou
  • Publication number: 20090090521
    Abstract: A method for dividing soil is disclosed. The method includes towing a frame via a hitch at a first end of the frame. The method also includes supporting the frame on the soil via an axle extending transversely of the frame, the axle connected to the frame between the first end of the frame and a second end of the frame. The method further includes dividing the soil with a plurality of rotatable discs attached to the frame between the frame and the soil, a first portion of the plurality of discs located between the first end of the frame and the axle, and a second portion of the plurality of discs located between the axle and the second end of the frame, wherein the first portion is aligned non-parallel with respect to the second portion. The method further includes moving the frame relative to the hitch to pivot about the axle.
    Type: Application
    Filed: October 31, 2008
    Publication date: April 9, 2009
    Inventor: John P. Moyna
  • Publication number: 20080257569
    Abstract: A draft load control system for an agricultural tractor towing a trailed, ground-engaging implement that monitors implement height using sensors located on the tractor or sensors coupled to an on-board control communications system and adjusts the implement position in relation to the ground based on draft load, implement height, and tractor wheel-slip to maintain a more accurate, consistent draft load on the tractor while maintaining the implement engaged with the ground and preventing the tractor-implement ground speed from being reduced to zero.
    Type: Application
    Filed: April 17, 2007
    Publication date: October 23, 2008
    Inventors: Chris Foster, Johnny Keplinger, Kevin M. Smith, John Posselius
  • Publication number: 20080257570
    Abstract: A draft load control system for an agricultural tractor coupled to a semi-trailed, ground-engaging implement that monitors implement height using sensors located on the tractor or sensors coupled to an on-board control communications system and adjusts the implement position in relation to the ground through coordinated action of the three-point hitch and the on-implement position actuator based on draft load, implement height, and tractor wheel-slip to maintain a more accurate, consistent draft load on the tractor while maintaining the implement engaged with the ground and preventing the tractor-implement ground speed from being reduced to zero.
    Type: Application
    Filed: April 17, 2007
    Publication date: October 23, 2008
    Inventors: Johnny Keplinger, Chris Foster, Kevin M. Smith
  • Publication number: 20080183356
    Abstract: A control system for a mobile excavation machine is disclosed. The control system may have a ground engaging work tool, a sensor, and a controller. The sensor may be configured to sense a parameter indicative of a current travel speed of the mobile excavation machine and generate a speed signal in response thereto. The controller may be in communication with the ground engaging work tool and the sensor, and configured to receive the signal. The controller may also be configured to determine an amount of material currently being moved by the work tool and calculate a current productivity value associated with removal of the material based on the speed signal and the determined amount of material currently being moved. The controller may be further configured to control the ground engaging work tool to vary the amount of material currently being moved in response to the current productivity value.
    Type: Application
    Filed: January 31, 2007
    Publication date: July 31, 2008
    Inventors: Satish L. Kale, Richard G. Ingram
  • Publication number: 20080066934
    Abstract: A draft load control system for a primary motive power source that uses hitch cylinder pressure to provide input to the control system of the draft load on the power source caused by a hitch-connected or a towed, ground-engaging implement.
    Type: Application
    Filed: August 29, 2006
    Publication date: March 20, 2008
    Inventor: Yanming Hou
  • Patent number: 7174966
    Abstract: A process of setting the length of an upper steering arm of an attaching device of a tractor. The attaching device includes the upper steering arm with a power drive provided for length setting purposes; a length sensor to determine the actual length of the upper steering arm; two lower steering arms with a lifting mechanism to lift and lower the lower steering arm; a lift sensor to determine the actual position of lift of the steering unit; as well as a control unit. The nominal lengths of the upper steering arm (7), to be determined as a function of the directions of movement of the lifting mechanism, are stored in the control unit. Determining the actual length of the upper steering arm (7), the actual position of lift of the lifting mechanism and the direction of movement of the lifting mechanism.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: February 13, 2007
    Assignee: GKN Walterscheid GmbH
    Inventor: Horst Ollefs
  • Patent number: 7121355
    Abstract: A dozer blade control system controls the position of a bulldozer blade, maintaining the blade at a constant position as the dozer travels through a worksite. The control system monitors the angle of the dozer blade with respect to the earth and when it senses that the dozer blade is tilting, it corrects the dozer blade's position by extending or retracting hydraulic cylinders that couple the dozer blade to the chassis of the crawler-tractor. When the dozer chassis pitches forwards, the blade begins to tilt forward and to drop closer to the ground. The control system senses this forward rotation of the blade and retracts the hydraulic cylinders that couple the blade to the chassis, causing the blade to return to and maintain its original position.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: October 17, 2006
    Assignee: CNH America LLC
    Inventors: George T. Lumpkins, Peter J. Dix, Daniel B. Shore
  • Patent number: 7104340
    Abstract: A draft force sensor is provided for a coupling member coupled between a towing vehicle and a towed earth engaging implement, such as a scraper. The draft force sensor includes first and second bores extending through the coupling member. Each bore has a horizontal axis which extends perpendicular to a main fore-and-aft axis of the coupling member. The second bore is positioned above the first bore and spaced apart from the first bore. Each of the bores is surrounded by an outer cylindrical wall. Four electrical strain gauges are spaced apart and placed on the wall of each of the bores. A center line bisects an axis line which extends between the axes of the first and second bores. The axis of each bore is spaced apart from the center line by a distance which is less than a diameter of the bores. The strain gauges are connected electrically in a circuit which generates a draft force signal in response to draft forces applied to the coupling member.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: September 12, 2006
    Assignee: Deere & Company
    Inventors: Raymond Dennis Thompson, Peter Alan Kosmicki, Jeffrey David Dawson, Scott Lisle Cook, Edwin Roy Kreis, Michael Dean Kollath, Joe Lyle Schutte, Robert James White
  • Patent number: 6980959
    Abstract: A method and system of managing a configuration of mechanical equipment provides a structured procedure for managing information on parameters of the mechanical equipment to facilitate the maintenance of safety, legal compliance, performance, and reliability of the mechanical equipment. A desired configuration of the mechanical equipment is defined based on a design objective, such as safety, reliability, performance, or any combination of the foregoing objectives. An actual configuration of the mechanical equipment is determined based on an evaluation of the mechanical equipment. Upgrade requirements are planned for upgrading the actual configuration to the desired configuration if the actual configuration is noncompliant with the desired configuration.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: December 27, 2005
    Assignee: Accenture LLP
    Inventors: Gary R. Garrow, Charles P. Newton, III, Patrick E. Weir, David P. West, II, Michael Wetzer
  • Patent number: 6971453
    Abstract: A control system controls a three point implement hitch assembly of a tractor. The three point implement hitch assembly includes an upper link and two lower links. The upper link includes an adjustable length double acting hydraulic unit. The position of each lower link is controlled by an adjustable length double acting hydraulic unit. A hydraulic circuit controls communication between the hydraulic units, a hydraulic supply and a hydraulic tank. The circuit permits each hydraulic unit to be controlled independently of one another.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: December 6, 2005
    Assignee: Deere & Company
    Inventor: Hendrik Nordhoff
  • Patent number: 6971452
    Abstract: A device for controlling the position of a mountable implement relative to an implement carrier vehicle has a mountable implement (2, 3, 4) which can be moved at a predetermined height by the implement carrier 1 following the ground. A support element (11, 19, 20), is coupled to the mountable implement (2, 3, 4) and can be attached to the implement carrier vehicle (1). A coupling device (15, 17, 18), is connected to the mountable implement (2, 3, 4) and to the support element (11, 19, 20). The mountable implement (2, 3, 4) is freely adjusted to a lifting position corresponding to the height path relative to the support element (11, 19, 20). An attachment device (6, 7, 8) attaches the support element (11, 19, 20) to the implement carrier vehicle 1 having a lifting device. A sensor determines the actual lifting position of the mountable implement (2, 3, 4) relative to the support element (11, 19, 20). A control device determines the deviation of the actual lifting position from a desired lifting position.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: December 6, 2005
    Assignee: GKN Walterscheld GmbH
    Inventors: Daniel Ocsenknecht, Karl Coenen, Matthias Grimsel
  • Patent number: 6935434
    Abstract: A hitch control system controls a vehicle hitch to which implements can be attached. The hitch control system includes a spring-centered primary command lever which is manually moveable from a centered position to deflected positions, and which automatically returns to the centered position when released from a deflected position. A control unit generates a hitch command signal in part as a function of the lever position. The control unit has a closed-loop control mode wherein the valve command signal is generated in response to parameter, such as position and draft force, and the hitch command signal. The control unit moves the hitch in a step-wise manner by a predetermined amount in response to momentary deflection of the command lever to one of the deflected positions, and the amount of hitch movement is independent of an amount and duration of deflection of the command lever if the duration is not more than a predetermined duration.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: August 30, 2005
    Assignee: Deere & Company
    Inventors: David Joseph Easton, Bruce Craig Newendorp, Mark Allen Bergene
  • Publication number: 20040244999
    Abstract: A lift cylinder arrangement is disclosed for a hydraulic support frame for underground mining. The support frame has a lift cylinder for lifting the base shoes during advancing, which is supported on the one hand on a return rod and on the other hand, in a pivoting manner, with an end supporting head to a drawbar connected to the base shoes. In order to allow a simple, rapid and reliable connection between the supporting head and the drawbar, the supporting head is connected to the drawbar by a plug-type locking system comprising two plug-type locking elements, which include first locking notches on the drawbar, and arranged complementarily thereto second locking notches on the supporting head, whereby the plug-type locking elements engage in at least one of the locking notches with clearance.
    Type: Application
    Filed: May 13, 2004
    Publication date: December 9, 2004
    Applicant: DBT GmbH
    Inventors: Friedrich Wilhelm Dannehl, Werner Reinelt, Holger Behnert