Patents by Inventor Gary Ligman

Gary Ligman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Drive system for screeding concrete
    Patent number: 11885078
    Abstract: An apparatus for steering and driving a concrete screed having a frame and a screed head secured thereto includes a plurality of spaced drive wheels rotatably and pivotably secured to the frame at a plurality of points, and a steering member coupled to one or more of the drive wheels for controlling the directional orientation thereof.
    Type: Grant
    Filed: November 1, 2021
    Date of Patent: January 30, 2024
    Assignee: Ligchine International Corporation
    Inventors: Peter A. Ligman, Gary Ligman
  • Electronically actuated leveling system for screeding concrete
    Patent number: 11788304
    Abstract: An apparatus for leveling a concrete screed having a frame and a screed head secured thereto includes a plurality of vertically adjustable leveling legs driven by a plurality of electrical actuators responsive to a command supplied by a user interface.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: October 17, 2023
    Assignee: Ligchine International Corporation
    Inventors: Peter A. Ligman, Gary Ligman
  • Electronically Actuated Leveling System for Screeding Concrete
    Publication number: 20230279680
    Abstract: An apparatus for leveling a concrete screed having a frame and a screed head secured thereto includes a plurality of vertically adjustable leveling legs driven by a plurality of electrical actuators responsive to a command supplied by a user interface.
    Type: Application
    Filed: May 11, 2023
    Publication date: September 7, 2023
    Inventors: Peter A. Ligman, Gary Ligman
  • Apparatus for screeding concrete
    Patent number: 11560727
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having an integral screed head having at least one member for contacting said concrete, a leveling assembly secured to the frame assembly having a plurality of vertically adjustable leveling legs capable of extension and retraction and a plurality of wheels secured to the leveling legs, each capable of rotation around a vertical axis for steering.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: January 24, 2023
    Assignee: Ligchine International Corporation
    Inventors: Peter A. Ligman, Gary Ligman
  • Drive System for Screeding Concrete
    Publication number: 20220049436
    Abstract: An apparatus for steering and driving a concrete screed having a frame and a screed head secured thereto includes a plurality of spaced drive wheels rotatably and pivotably secured to the frame at a plurality of points, and a steering member coupled to one or more of the drive wheels for controlling the directional orientation thereof.
    Type: Application
    Filed: November 1, 2021
    Publication date: February 17, 2022
    Inventors: Peter A. Ligman, Gary Ligman
  • Drive system for screeding concrete
    Patent number: 11162232
    Abstract: An apparatus for steering and driving a concrete screed having a frame and a screed head secured thereto includes a plurality of spaced drive wheels rotatably and pivotably secured to the frame at a plurality of points, and a steering member coupled to one or more of the drive wheels for controlling the directional orientation thereof.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: November 2, 2021
    Assignee: Ligchine International Corporation
    Inventors: Peter A. Ligman, Gary Ligman
  • APPARATUS FOR SCREEDING CONCRETE
    Publication number: 20200109573
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having an integral screed head having at least one member for contacting said concrete, a leveling assembly secured to the frame assembly having a plurality of vertically adjustable leveling legs capable of extension and retraction and a plurality of wheels secured to the leveling legs, each capable of rotation around a vertical axis for steering.
    Type: Application
    Filed: August 26, 2019
    Publication date: April 9, 2020
    Inventors: Peter A. Ligman, Gary Ligman
  • Drive for Apparatus for Screeding Concrete
    Publication number: 20200109525
    Abstract: An apparatus for steering and driving a concrete screed having a frame and a screed head secured thereto includes a plurality of spaced drive wheels rotatably and pivotably secured to the frame at a plurality of points, and a steering member coupled to one or more of the drive wheels for controlling the directional orientation thereof.
    Type: Application
    Filed: September 6, 2019
    Publication date: April 9, 2020
    Inventors: Peter A. Ligman, Gary Ligman
  • Electronically Actuated Leveling System for Screeding Concrete
    Publication number: 20200109526
    Abstract: An apparatus for leveling a concrete screed having a frame and a screed head secured thereto includes a plurality of vertically adjustable leveling legs driven by a plurality of electrical actuators responsive to a command supplied by a user interface.
    Type: Application
    Filed: September 10, 2019
    Publication date: April 9, 2020
    Inventors: Peter A. Ligman, Gary Ligman