Patents by Inventor Peter A. Ligman

Peter A. 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).

  • Electronically actuated leveling system for screeding concrete
    Patent number: 12680240
    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: May 11, 2023
    Date of Patent: July 14, 2026
    Assignee: Ligchine International Corporation
    Inventors: Peter A. Ligman, Gary Ligman
  • Swing boom concrete screeding apparatus
    Patent number: 12529194
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly is also adjustably mounted on said front member to allow generally lateral motion of the boom.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: January 20, 2026
    Assignee: Ligchine International Corporation
    Inventor: Peter A. Ligman
  • Portable telescopic conveyor belt
    Patent number: 12378082
    Abstract: A portable telescopic conveyor apparatus includes a mounting frame for securing the conveyor to a mobile platform, a boom frame housing a plurality of extendable conveyor sections, and a pair of opposed outriggers for stabilizing the conveyor apparatus when in use.
    Type: Grant
    Filed: October 25, 2022
    Date of Patent: August 5, 2025
    Assignee: Ligchine International Corporation
    Inventors: Peter A. Ligman, Bradley Alan Davis, Carey A. Zielinski
  • SWING BOOM CONCRETE SCREEDING APPARATUS
    Publication number: 20250230615
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly is also adjustably mounted on said front member to allow generally lateral motion of the boom.
    Type: Application
    Filed: April 7, 2025
    Publication date: July 17, 2025
    Inventor: Peter A. Ligman
  • Swing boom concrete screeding apparatus
    Patent number: 12270159
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly is also adjustably mounted on said front member to allow generally lateral motion of the boom.
    Type: Grant
    Filed: March 29, 2024
    Date of Patent: April 8, 2025
    Assignee: Ligchine International Corporation
    Inventor: Peter A. Ligman
  • SIDE-STEP CONCRETE SCREEDING APPARATUS
    Publication number: 20250043519
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a pair of spaced vertically oriented stabilization legs secured to the front end thereof supporting a generally horizontal front member. An extendable boom assembly is secured to the frame assembly at a first end and to a screed head at a second end. A side-step assembly includes an actuator with an extendable arm secured to the boom assembly to impart generally lateral motion.
    Type: Application
    Filed: October 22, 2024
    Publication date: February 6, 2025
    Inventor: Peter A. Ligman
  • Side-step concrete screeding apparatus
    Patent number: 12123152
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a pair of spaced vertically oriented stabilization legs secured to the front end thereof supporting a generally horizontal front member. An extendable boom assembly is secured to said frame assembly at a first end and to a screed head at a second end. A side-step assembly includes an actuator with an extendable arm secured to said boom assembly to impart generally lateral motion.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: October 22, 2024
    Assignee: Ligchine International Corporation
    Inventor: Peter A. Ligman
  • Concrete Screed with Vision System
    Publication number: 20240240414
    Abstract: An apparatus for screeding concrete includes a frame, a plurality of drive wheels secured thereto, an extendable and retractable boom secured to the frame and a screed head secured to a distal end of the boom. The apparatus includes a control system operatively coupled to a plurality of cameras secured at points around the apparatus and an operator interface for displaying the view of each camera.
    Type: Application
    Filed: January 16, 2024
    Publication date: July 18, 2024
    Inventors: Peter A. Ligman, Joshua Rocholl, Kyle Hohmann, Justin Foltz, Brad Davis
  • Electric Apparatus for Screeding Concrete
    Publication number: 20240240413
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly, a hydraulic extendable boom assembly secured to said frame assembly at a first end and to a screed head at a second end, a hydraulic leveling assembly and an electric power source and power management system for driving a hydraulic system to power the apparatus.
    Type: Application
    Filed: January 16, 2024
    Publication date: July 18, 2024
    Inventors: Peter A. Ligman, Joshua Rocholl, Kyle Hohmann, Justin Foltz, Brad Davis
  • SWING BOOM CONCRETE SCREEDING APPARATUS
    Publication number: 20240240415
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly is also adjustably mounted on said front member to allow generally lateral motion of the boom.
    Type: Application
    Filed: March 29, 2024
    Publication date: July 18, 2024
    Inventor: Peter A. Ligman
  • Swing boom concrete screeding apparatus
    Patent number: 11946208
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly is also adjustably mounted on said front member to allow generally lateral motion of the boom.
    Type: Grant
    Filed: May 24, 2023
    Date of Patent: April 2, 2024
    Assignee: Ligchine International Corporation
    Inventor: Peter A. Ligman
  • 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
  • Swing Boom Concrete Screeding Apparatus
    Publication number: 20230295884
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly is also adjustably mounted on said front member to allow generally lateral motion of the boom.
    Type: Application
    Filed: May 24, 2023
    Publication date: September 21, 2023
    Inventor: Peter A. 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
  • Portable Telescopic Conveyor Belt
    Publication number: 20230126101
    Abstract: A portable telescopic conveyor apparatus includes a mounting frame for securing the conveyor to a mobile platform, a boom frame housing a plurality of extendable conveyor sections, and a pair of opposed outriggers for stabilizing the conveyor apparatus when in use.
    Type: Application
    Filed: October 25, 2022
    Publication date: April 27, 2023
    Inventors: Peter A. Ligman, Bradley Alan Davis, Carey A. Zielinski
  • 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
  • Swing Boom Concrete Screeding Apparatus
    Publication number: 20220267967
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a front end and rear ends and a pair of spaced vertically oriented stabilization legs supporting a generally horizontal front member. An extendable boom assembly is provided having front and rear ends, and an exterior boom section pivotably secured to the frame assembly proximate said rear end. The extendable boom assembly is also adjustably mounted on said front member to allow generally lateral motion of the boom.
    Type: Application
    Filed: February 23, 2022
    Publication date: August 25, 2022
    Inventor: Peter A. Ligman
  • Side-Step Concrete Screeding Apparatus
    Publication number: 20220162814
    Abstract: An apparatus for screeding concrete to produce a level finished surface includes a frame assembly having a pair of spaced vertically oriented stabilization legs secured to the front end thereof supporting a generally horizontal front member. An extendable boom assembly is secured to said frame assembly at a first end and to a screed head at a second end. A side-step assembly includes an actuator with an extendable arm secured to said boom assembly to impart generally lateral motion.
    Type: Application
    Filed: June 28, 2021
    Publication date: May 26, 2022
    Inventor: Peter A. 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