Patents Assigned to Douglas Dynamics, L.L.C.
  • Patent number: 12644244
    Abstract: A containment plow adapted to be mounted to a vehicle such as a skid steer, a wheeled loader, or a tractor comprises a moldboard frame, a moldboard mounted to the moldboard frame, a wing pivotally connected to the moldboard frame adjacent each end of the moldboard, a moldboard cutting edge mounted to a lower edge of the moldboard and comprising a plurality of cutting edge segments, and a wing cutting edge mounted to a lower edge of each wing. Each moldboard cutting edge segment is mounted so as to have two rotational degrees of freedom movement relative to the moldboard and one translational degree of freedom movement relative to the moldboard. Each wing cutting edge is mounted so as to have two rotational degrees of freedom movement relative to the wing.
    Type: Grant
    Filed: November 9, 2022
    Date of Patent: June 2, 2026
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Derek William Adam, Benjamin Chadwick Altfillisch, David N. Bloxdorf, Christopher David Damon
  • Patent number: 12630989
    Abstract: A vehicle mounted sprayer for spreading liquid treatment material for treatment or pre-treatment of road surfaces comprises a plurality of tanks for containing main brine material to be spread, a hot mix tank supplying hot mix, a mix valve for mixing the main brine and hot mix, pumps for controllably delivering main brine and hot mix to the mix valve, and a flow sensor for measuring the flow rate of liquid treatment material. A controller determines the intended density and flow rate of liquid based on sensor inputs.
    Type: Grant
    Filed: March 24, 2023
    Date of Patent: May 19, 2026
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Bob W. Iverson, Jeffery Scott De Ruyter, Tucker Evans Hill, Andrew Joseph Janowicz, Jason Nathanael Sievert
  • Patent number: 12497743
    Abstract: A convertible snow plow comprises a support frame having a forward end and a rearward end, the rearward end adapted to be mounted to a vehicle, a pair of plow blades hinged together along inboard ends of the blades at a hinge at the forward end of the support frame, an actuator having opposite ends, one end connected to the support frame, and a two-position linkage connected to the other end of the actuator and to at least one of the blades. When the linkage is in the first position the blades are in a straight blade configuration and the actuator is operable to position the blades in straight blade forward, straight blade left, and straight blade right positions, and when the linkage is in the second position the blades are in a V-blade configuration and the actuator is operable to position the blades in forward swept V and rearward swept V positions.
    Type: Grant
    Filed: March 17, 2022
    Date of Patent: December 16, 2025
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Gatesy R.C.D. Gates, Andre Valmont Leblond
  • Patent number: 12497744
    Abstract: A containment plow adapted to be mounted to a vehicle such as a skid steer, a wheeled loader, or a tractor comprises a moldboard frame, a moldboard mounted to the moldboard frame, a wing pivotally connected to the moldboard frame adjacent each end of the moldboard, a moldboard cutting edge mounted to a lower edge of the moldboard and comprising a plurality of cutting edge segments, and a wing cutting edge mounted to a lower edge of each wing. Each moldboard cutting edge segment is mounted so as to have two rotational degrees of freedom movement relative to the moldboard and one translational degree of freedom movement relative to the moldboard. Each wing cutting edge is mounted so as to have two rotational degrees of freedom movement relative to the wing.
    Type: Grant
    Filed: June 14, 2022
    Date of Patent: December 16, 2025
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Derek William Adam, Benjamin Chadwick Altfillisch, David N. Bloxdorf, Christopher David Damon, Christopher Aaron Horn
  • Patent number: 12281453
    Abstract: A snow plow assembly comprises an angle frame adapted to be operably mounted to a vehicle, a quadrant frame, a plow blade mounted to the quadrant frame, a drive link pivotally connected to the angle frame and the quadrant frame at first and second pivot points, respectively, a swing link pivotally connected to the angle frame and the quadrant frame at third and fourth pivot points, respectively, the angle frame, quadrant frame, drive link, and swing link, and the first, second, third, and fourth pivot points defining a four-bar linkage, and a first actuator pivotally connected on one end to the angle frame at a fifth pivot point and pivotally connected on the other end to the drive link at a sixth pivot point, wherein extending the first actuator causes the quadrant frame and hence the plow blade to rotate in a first direction from a neutral position generally perpendicular to a longitudinal axis of the vehicle, and retracting the first actuator causes the quadrant frame and hence the plow blade to rotate in
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: April 22, 2025
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Gatesy R. C. D. Gates, Andre Valmont Leblond, Craig D. MacIntosh
  • Patent number: 12188190
    Abstract: A spreader comprises a hopper for containing sand, salt or other granular material to be spread upon snow or ice on paved surfaces, the hopper being adapted to be installed in or on a bed of a truck, the hopper having a trough, a shaftless auger positioned in the trough, an auger motor for driving the auger, a spinner positioned at one end of the auger for slinging the granular material upon the snow or ice, a spinner motor for driving the spinner, and at least one keeper supported by the trough and extending over the auger for retaining the auger in place during operation and thereby reducing flexure of the auger and resulting loss of efficiency of material transport by the auger during operation of the spreader.
    Type: Grant
    Filed: April 17, 2023
    Date of Patent: January 7, 2025
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Ryan Fossett, Christopher Aaron Horn, Gregory B. Neilson, Paul Yagiela
  • Patent number: 11680379
    Abstract: A spreader comprises a hopper for containing sand, salt or other granular material to be spread upon snow or ice on paved surfaces, the hopper being adapted to be installed in or on a bed of a truck, the hopper having a trough, a shaftless auger positioned in the trough, an auger motor for driving the auger, a spinner positioned at one end of the auger for slinging the granular material upon the snow or ice, a spinner motor for driving the spinner, and at least one keeper supported by the trough and extending over the auger for retaining the auger in place during operation and thereby reducing flexure of the auger and resulting loss of efficiency of material transport by the auger during operation of the spreader.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: June 20, 2023
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Ryan Fossett, Christopher Aaron Horn, Gregory B. Neilson, Paul Yagiela
  • Patent number: 11499280
    Abstract: A snow plow and mount frame assembly permits an operator to attach a snow plow to a mount frame secured to a vehicle, without the operator exiting a cab of the vehicle.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: November 15, 2022
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Chad Thomas Barker, David N. Bloxdorf, Matthew Thoma Curran, Gerald L. Depies, Christopher Aaron Horn, Bob Iverson, Leonard D. Morris
  • Patent number: 11427978
    Abstract: A snow plow and mount assembly has a mount frame, an A-frame, a lift frame, a plow blade, an actuator, arms, receivers, recesses, hitch pins, a latch mechanism, and a latch lever. The elements are arranged such that the vehicle is driven toward the snow plow so that the arms are received in the receivers, the actuator is energized to pivot the lift frame relative to the A-frame so that the hitch pins are received in the recesses, and the lever is moved to move the latch mechanism to the latched position. The snow plow frame is thereby removably secured to the mount frame.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: August 30, 2022
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Chad Thomas Barker, David N. Bloxdorf, Matthew Thoma Curran, Christopher A. Dominguez, Matthew Terran Kaminecki
  • Patent number: 11332899
    Abstract: A snow plow and mount assembly has a mount frame, an A-frame, a lift frame, a plow blade, an actuator, arms, receivers, recesses, hitch pins, a latch mechanism, and a latch lever. The elements are arranged such that the vehicle is driven toward the snow plow so that the arms are received in the receivers, the actuator is energized to pivot the lift frame relative to the A-frame so that the hitch pins are received in the recesses, and the lever is moved to move the latch mechanism to the latched position. The snow plow frame is thereby removably secured to the mount frame.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: May 17, 2022
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Chad Thomas Barker, David N. Bloxdorf, Matthew Thoma Curran, Christopher A. Dominguez, Matthew Terran Kaminecki
  • Patent number: 10900183
    Abstract: A snow plow and mount assembly has a mount frame, an A-frame, a lift frame, a plow blade, an actuator, arms, receivers, recesses, hitch pins, a latch mechanism, and a latch lever. The elements are arranged such that the vehicle is driven toward the snow plow so that the arms are received in the receivers, the actuator is energized to pivot the lift frame relative to the A-frame so that the hitch pins are received in the recesses, and the lever is moved to move the latch mechanism to the latched position. The snow plow frame is thereby removably secured to the mount frame.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: January 26, 2021
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Chad Thomas Barker, David N. Bloxdorf, Matthew Thoma Curran, Christopher A. Dominguez, Matthew Terran Kaminecki
  • Patent number: 10793056
    Abstract: A snow plow headlamp comprises a housing adapted to be mounted to a frame member of a snow plow assembly, at least a first forwardly directed LED mounted in the housing between opposite ends of the housing and configured to illuminate ahead of a vehicle to which the snow plow assembly is mounted, a second forwardly directed LED mounted in the housing adjacent one of the ends of the housing, a reflector mounted in the housing on a side of the second LED opposite the one end of the housing and configured to reflect light from the second LED to illuminate to a side of the vehicle to which the snow plow assembly is mounted, and a transparent cover mounted to the housing.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: October 6, 2020
    Assignee: Douglas Dynamics, L.L.C.
    Inventor: Christopher Aaron Horn
  • Patent number: 9869067
    Abstract: A snow plow and mount assembly has a mount frame, an A-frame, a lift frame, a plow blade, an actuator, arms, receivers, recesses, hitch pins, a latch mechanism, and a latch lever. The elements are arranged such that the vehicle is driven toward the snow plow so that the arms are received in the receivers, the actuator is energized to pivot the lift frame relative to the A-frame so that the hitch pins are received in the recesses, and the lever is moved to move the latch mechanism to the latched position. The snow plow frame is thereby removably secured to the mount frame.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: January 16, 2018
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Chad Thomas Barker, David N. Bloxdorf, Matthew Thomas Curran, Christopher A. Dominguez, Matthew Terran Kaminecki
  • Patent number: 9822563
    Abstract: For a V-plow having a pair of blades hinged together along inboard ends of the blades at a hinge, a gauge on a lower end of the hinge having a spacer, the spacer having a thickness in a direction generally transverse to a longitudinal axis of the V-plow corresponding to a desired minimum spacing between inboard ends of a pair of cutting edge plates to be installed on the blades, a method of installing the cutting edge plates on the blades is provided. The method comprises positioning one of the cutting edge plates along a lower edge of one of the blades so that the inboard end of the one cutting edge plate abuts one side of the spacer, securing the one cutting edge plate to the one blade, positioning the other cutting edge plate along a lower edge of the other blade so that the inboard end of the other cutting edge plate abuts the other side of the spacer, and securing the other cutting edge plate to the other blade.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: November 21, 2017
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Tyler Jones, Matthew Kaminecki
  • Patent number: 9271441
    Abstract: A material spreader having a beater bar that meters the supply of small quantities of material to the discharge opening of a material spreader hopper eliminating the need for a gate. The beater bar has one and preferably several paddles that rotate adjacent the discharge opening and as the paddle passes the opening, discharges only the amount of material on the paddle. The material spreader uses a high ratio transmission and low rpm motor to allow for extremely slow rotation of the beater bar. The motor speed can be controlled to allow very slow rotation and very small amounts of material to be discharged from the hopper. The spreader does not require a gate. The discharge of material is metered electronically.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: March 1, 2016
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Charles Truan, Barry Truan
  • Patent number: 9200418
    Abstract: For a V-plow having a pair of blades hinged together along inboard ends of the blades at a hinge, a gauge on a lower end of the hinge having a spacer, the spacer having a thickness in a direction generally transverse to a longitudinal axis of the V-plow corresponding to a desired minimum spacing between inboard ends of a pair of cutting edge plates to be installed on the blades, a method of installing the cutting edge plates on the blades is provided. The method comprises positioning one of the cutting edge plates along a lower edge of one of the blades so that the inboard end of the one cutting edge plate abuts one side of the spacer, securing the one cutting edge plate to the one blade, positioning the other cutting edge plate along a lower edge of the other blade so that the inboard end of the other cutting edge plate abuts the other side of the spacer, and securing the other cutting edge plate to the other blade.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: December 1, 2015
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Tyler Jones, Matthew Kaminecki
  • Patent number: 8850724
    Abstract: A plow assembly for attachment to a vehicle having a longitudinal axis comprises a plow blade having first and second ends, a first plow wing pivotally mounted to the first end of the plow blade, and a plow support adapted to be operably mounted to the vehicle. The first plow wing is biased by a first compression. A first connecting member is connected to the first plow wing, passes through the first compression spring generally coaxially therewith, and is connected to the plow support. The first connecting member is configured to pivot the first plow wing relative to the plow blade during pivoting of the plow blade from a center position to a first position such that when the plow blade is in the first position the first plow wing is generally parallel to the plow blade.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: October 7, 2014
    Assignee: Douglas Dynamics, L.L.C.
    Inventor: David N. Bloxdorf
  • Publication number: 20140237865
    Abstract: For a V-plow having a pair of blades hinged together along inboard ends of the blades at a hinge, a gauge on a lower end of the hinge having a spacer, the spacer having a thickness in a direction generally transverse to a longitudinal axis of the V-plow corresponding to a desired minimum spacing between inboard ends of a pair of cutting edge plates to be installed on the blades, a method of installing the cutting edge plates on the blades is provided. The method comprises positioning one of the cutting edge plates along a lower edge of one of the blades so that the inboard end of the one cutting edge plate abuts one side of the spacer, securing the one cutting edge plate to the one blade, positioning the other cutting edge plate along a lower edge of the other blade so that the inboard end of the other cutting edge plate abuts the other side of the spacer, and securing the other cutting edge plate to the other blade.
    Type: Application
    Filed: February 26, 2013
    Publication date: August 28, 2014
    Applicant: DOUGLAS DYNAMICS, L.L.C.
    Inventors: Tyler Jones, Matthew Kaminecki
  • Patent number: D880027
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: March 31, 2020
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Christopher Aaron Horn, Seth Thomas Bergerud, Robert Douglas Clark, Michael Lee Frank, Tyler Barron Jones
  • Patent number: D904654
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: December 8, 2020
    Assignee: Douglas Dynamics, L.L.C.
    Inventors: Christopher Aaron Horn, Seth Thomas Bergerud, Robert Douglas Clark, Michael Lee Frank, Tyler Barron Jones