Control Of Attitude Or Depth Of Cut Patents (Class 37/415)
  • Patent number: 9038289
    Abstract: There is here disclosed an excavation machine having an automatic controlled excavation implement that adjusts the excavation implement to maximize the earth moved in accordance with vehicle operating parameters, and finished terrain parameters.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: May 26, 2015
    Assignee: Deere & Company
    Inventor: Andrew Wayne Kelly
  • Patent number: 8762010
    Abstract: This disclosure relates to a control system for a machine implement. The control system includes a measurement sensor configured to provide an implement measurement signal indicative of a velocity of a machine implement, and a controller. The controller is configured to provide an implement measurement signal and an operator command signal, and to determine an adjusted implement command based signal based on the implement measurement signal and the operator command signal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 24, 2014
    Assignee: Caterpillar Inc.
    Inventors: Todd R. Farmer, Charles W. Grant, Gregory A. Epplin, Michael J. Chadwick, Joshua D. Callaway
  • Patent number: 8726543
    Abstract: There is here disclosed an excavation machine having an automatic controlled excavation implement that adjusts the excavation implement to maximize the earth moved in accordance with vehicle operating parameters, and finished terrain parameters.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: May 20, 2014
    Assignee: Deere & Company
    Inventor: Andrew W Kelly
  • Patent number: 8700273
    Abstract: This disclosure relates to a control system for a machine. The control system includes a sensor configured to provide an implement measurement signal indicative of a velocity of a machine implement, and a controller. The controller is configured to receive the implement measurement signal, determine whether a main threshold condition is met, and to determine an adjusted implement command based at least in part on the implement measurement signal.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: April 15, 2014
    Assignee: Caterpillar Inc.
    Inventors: Todd R. Farmer, Charles W. Grant, Gregory A. Epplin, Michael J. Chadwick, Joshua D. Callaway
  • Patent number: 8527158
    Abstract: A control system and method operate to store target signals indicative of end of travel positions of components of a machine. The positions and velocities of the components of a machine are determined at least in part based upon signals received from sensors and command signals are generated to control movement of the components based upon input from an operator, proximate to the end of travel positions and the velocities of the components. Command signals are transmitted to control movement of the components. Multiple end of travel positions may also be defined.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: September 3, 2013
    Assignee: Caterpillar Inc.
    Inventors: Joseph Faivre, Lyle Post
  • Patent number: 8437925
    Abstract: A leveling control system and method for heavy equipment, in which a lower frame having a traveling unit and an upper frame are combined together by a tilting unit, includes a sensor unit, provided in the equipment, for measuring twist angles of the lower frame and the upper frame against a reference horizontal surface and a traveling speed of the equipment, and detecting working state information of working devices; a control unit for receiving the twist angles, the traveling speed, and the working state information, calculating a correction angle for the leveling control of the upper frame, and generating a control signal for instructing an operation of an actuator in accordance with the correction angle; and a driving unit for performing the leveling through the actuator in accordance with the control signal received therein.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: May 7, 2013
    Assignee: Volvo Construction Equipment Holding Sweden AB
    Inventors: Jin Seop Kim, Chang Soo Lee, In Woo Kim
  • Patent number: 8406963
    Abstract: This disclosure relates to a control system for a machine implement. The control system includes a measurement sensor configured to provide an implement measurement signal indicative of a velocity of a machine implement, and a controller. The controller is configured to provide an implement measurement signal and an operator command signal, and to determine an adjusted implement command based signal based on the implement measurement signal and the operator command signal.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: March 26, 2013
    Assignee: Caterpillar Inc.
    Inventors: Todd R. Farmer, Charles W. Grant, Gregory A. Epplin, Michael J. Chadwick, Joshua D. Callaway
  • Patent number: 8195367
    Abstract: A leveling control system and method for heavy equipment, in which a lower frame having a traveling unit and an upper frame are combined together by a tilting unit. The system includes a sensor unit, provided in the equipment, for measuring twist angles of the lower frame and the upper frame against a reference horizontal surface and a traveling speed of the equipment, and detecting working state information of working devices; a control unit for receiving the twist angles, the traveling speed, and the working state information, calculating a correction angle for the leveling control of the upper frame, and generating a control signal for instructing an operation of an actuator in accordance with the correction angle; and a driving unit for performing the leveling through the actuator in accordance with the control signal received therein.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: June 5, 2012
    Assignee: Volvo Construction Equipment Holding Sweden AB
    Inventors: Jin Seop Kim, Chang Soo Lee, In Woo Kim
  • Patent number: 7899598
    Abstract: The invention relates to a method for controlling a surface-modifying machine, wherein information on the desired condition and on the actual condition of ground to be prepared is provided and is used to derive control statements for the machine based on a comparison of the desired and the actual condition. The information on the actual condition is represented by a point cloud as a spatial distribution of discrete surface points. In order to derive control statements, at least two surface points each from the point cloud are used for every horizontal position so that non-differentiated information can be derived that for example also allow to identify various planes.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: March 1, 2011
    Assignee: Leica Geosystems AG
    Inventors: Clement Woon, Peter A. Stegmaier, Klaus Schneider, Martin Nix
  • Patent number: 7568300
    Abstract: A combination support stand and bucket locking system for providing both a support stand and a locking device for selectively preventing movement of a bucket with respect to an implement attached to a bucket. The combination support stand and bucket locking system includes a bucket, a locking bracket extending from the bucket, an implement that pivotally attaches to the bucket, an arm member pivotally attached to the implement wherein the distal portion of the arm member is capable of engaging the locking bracket, and an actuator connected between the arm member and the implement. The arm member includes a support stand for supporting the implement when the arm member is within the support position.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: August 4, 2009
    Inventors: David L. McFarland, Clayton A. Melrose
  • Publication number: 20090082929
    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: Application
    Filed: September 25, 2007
    Publication date: March 26, 2009
    Inventor: Larry Ellis Kendrick
  • Patent number: 7293376
    Abstract: A grading control system for a work machine having a work implement for grading along a grade defined by a laser plane generator is disclosed. The system includes tilt and lift actuators associated with the work implement and configured to selectively tilt, raise and lower the work implement. A laser receiver is configured to receive a laser signal indicative of a desired grade. The laser receiver is configured to communicate a height signal indicative of a position of the work machine relative to the laser plane. A lift sensor is configured to communicate a lift signal indicative of a lift position of the work implement. A control module is configured to generate and communicate a control signal based on the height and lift signals to actuate at least one of the lift and tilt actuators to maintain the work implement at a position substantially corresponding to the desired grade.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: November 13, 2007
    Assignee: Caterpillar Inc.
    Inventor: Clarence Matthew Glover
  • Patent number: 6637134
    Abstract: Snow track preparation machine with mill installed in a revolving manner and including a pump driven by a power source, a hydraulic motor connected to the pump on the delivery side and the return side, an actuator supported on the assembly frame and realized for rotation of the mill and driving wheels. The power source is made up of a motor (2) which drives the driving wheels (5,6) and the pump (9) and actuator (16) are influenced by a control unit (17) connected to a sensor of motor rpm nD, to a sensor of the rpm of the driving wheels na1 and na2, to a sensor for the hydraulic motor of the mill and an actuator path sensor with the control unit (17) connecting the magnitudes detected by the sensors by means of an algorithm and controlling on the basis thereof the pump (9) and the actuator.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: October 28, 2003
    Assignee: Prinoth GmbH SRL
    Inventor: Ulrich Hammerle
  • Publication number: 20020078606
    Abstract: A ground surface trimmer 10 has a bin 14 having an open front 22 and a scraper 20 extends across the front edge of the bottom 24 so as to scrape the ground surface and collect material through the front opening into the bin 14. A main frame 12 has a towing hitch 13 for coupling to a tractor. Two rear wheels 31 are mounted behind the bin 14 and a ram 39 is used to adjust the height of the bin and scraper relative to the wheels. A first control 26 comprising a front closure 27 is operative to selectively control collection into the bin 14 through the front opening 22 of material scraped from the ground surface and the second control 40 comprising a movable pusher 43 within the bin is operative to selectively control the discharge from the bin 14 through the front opening 22 of material within the bin 14.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 27, 2002
    Inventor: Trevor Grummett
  • Patent number: 6125561
    Abstract: The present invention generally provides a method of automatic control for a scraper bowl by measuring a first force as applied to the scraper bowl during forward movement of the scraper. Preferably, the first force is derived by measuring the hydraulic pressure within the hydraulic actuator that controls the scraper bowl. A target force value is then subtracted from the first force to obtain a force error signal which is converted into a position command signal. The position command signal is preferably used to automatically adjust the depth of cut performed by the scraper blade without diversion of the operator's attention. Additionally, the scraper blade can be further controlled by constraining the vertical adjustment speed signal of the cutting blade to prevent the cutting blade from digging to deep or breaking through the ground by providing an upper constraint limit and a lower constraint limit which can be set according to tractive effort and the material condition acting upon the scraper blade.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: October 3, 2000
    Assignee: Caterpillar Inc.
    Inventor: Andrew G. Shull
  • Patent number: 6112828
    Abstract: An earth working scraper including a semi-circular scraper assembly having a scraper blade and a plurality of wall sections. The wall sections form a compartmentalized space substantially interior the scraper assembly for carrying soil. A wheeled carriage is journalled to the scraper assembly with a plurality of support arms and is adapted to partially support the scraper assembly. An arched connector is fixedly attached to the scraper assembly and removably attachable to a towing vehicle, the arched connector being adapted to partially support the scraper assembly. At least one hydraulic cylinder is included in the combination which is journalled between the wheeled carriage and the scraper assembly. The hydraulic cylinder assembly is adapted to cooperate with the arched connector to raise and lower the scraper assembly and also to rotate the scraper assembly about a transverse axis therethrough.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: September 5, 2000
    Inventor: Servando Leal
  • Patent number: 5960378
    Abstract: An excavation area setting system for area limiting excavation control in construction machines, with the excavation control being performed to calculate a target speed vector for control of a front device on the basis of a body, modify the target speed vector to limit a moving speed of the front device in the direction toward a boundary of a preset excavation area when the front device comes close to the boundary of the excavation area, and move the front device along the boundary of the excavation area. To set the excavation area, an external reference is installed horizontally outside the hydraulic excavator and a depth from the external reference to the boundary of the excavation area is set by using a setting device. The excavation area is set in a manner matched with the excavation control in which calculation is executed based on the position of the body.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: September 28, 1999
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hiroshi Watanabe, Toichi Hirata, Masakazu Haga, Kazuo Fujishima
  • Patent number: 5682311
    Abstract: A depth measuring apparatus for an excavator which includes an inclination sensor assembly mounted along the pivot axis between the stick arm boom and the bucket, a depth sensor mounted along the same pivot axis as well as a laser receiver for receiving a radiation establishing a reference level mounted coaxially with the pivot axis between the stick arm boom and the bucket such that after the reference level has been established, and the laser receiver is impinged by radiation each time it passes through the reference level, thereby zeroing out the measuring apparatus, the actual depth of a trench may be measured with respect to the reference level by considering the inclination of the bucket as well as the depth displayed by the depth sensor when the bucket is lowered into the trench.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: October 28, 1997
    Inventor: George J. Clark
  • Patent number: 5561924
    Abstract: In a scraper, or the like, having as its purpose the cutting of a level swath in an earthen terrain, and receiving the earth cut from the terrain, in which the cutting blade is mounted, in a level attitude, to a scraper frame, which frame is itself mounted on wheels for movement along the terrain, means for adjusting the wheels relative to the frame so as to maintain the level attitude of the blade over uneven terrain, or under conditions of uneven loading of the earth removed from the swath.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: October 8, 1996
    Inventor: Thomas N. Ramey
  • Patent number: 5559725
    Abstract: A method and apparatus for controlling a trencher having a tractor that is propelled along terrain and a trenching implement adjustably mounted to the tractor at a rearward portion thereof with respect to movement of the tractor along the terrain includes monitoring movement of the tractor as it is propelled along terrain in order to survey the contour of the terrain and adjusting the position of the trenching implement with respect to the tractor as a function of the contour of the terrain in the vicinity of the trencher.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: September 24, 1996
    Assignee: Laser Alignment, Inc.
    Inventors: Edward G. Nielson, Timothy S. DeBruine, Daniel P. Modzeleski, Ross C. Stoepker