Patents Assigned to Dura-Line LLC
  • CONTROLLING COOLING RATE TO AVOID THERMAL WELDING OF SHEATH AND DUCT AT HIGHER SPEED
    Publication number: 20250162231
    Abstract: An apparatus for making a product comprising a plurality of microducts bundled within a protective outer sheath, wherein the apparatus functions to inhibit thermal welding of the sheath and the microducts, and a corresponding method of making the bundled microducts.
    Type: Application
    Filed: November 21, 2023
    Publication date: May 22, 2025
    Applicant: Dura-Line LLC
    Inventor: Moonpil Choi
  • MULTI-LAYER MATERIAL INCORPORATING SUSTAINABLE RESINS AND HAVING IMPROVED MECHANICAL PROPERTIES
    Publication number: 20250019529
    Abstract: A multi-layer device, such as a tube, a conduit, a tubular member, a housing, an enclosure, a fabric, a material, or any other mechanical form factor, in which at least one layer of the multi-layer device contains a mixture of a virgin high density polyethylene (HDPE) and a recycled HDPE.
    Type: Application
    Filed: March 22, 2024
    Publication date: January 16, 2025
    Applicant: Dura-Line LLC
    Inventors: Sungki Cho, Arturo Valencia, Sam Lukubira, Jonghan Choi
  • Ultra-low friction materials for lubricating surfaces, devices therewith, and methods of manufacture and use thereof
    Patent number: 11753601
    Abstract: A polymeric material mixture comprising a fluorine-containing polymer, a siloxane polymer, and at least two polymer processing additives (PPA), wherein the at least two polymer processing additives have different chemistries. For example, there can be a flexible coextruded pipe for providing a protective housing for cables, fluids, sludge or solids, the pipe comprising a pair of telescopically related inner and outer layers, where said inner layer is lubricated with the polymeric material mixture.
    Type: Grant
    Filed: February 14, 2022
    Date of Patent: September 12, 2023
    Assignee: Dura-Line LLC
    Inventors: H. Thomas Chung, Fei Fan, Sung Ki Cho, Sam Lukubira, Caleb Michael Spradling, Arturo Valencia
  • Ultra-low friction materials for lubricating surfaces, devices therewith, and methods of manufacture and use thereof
    Patent number: 11702612
    Abstract: A polymeric material mixture comprising a fluorine-containing polymer, a siloxane polymer, and at least two polymer processing additives (PPA), wherein the at least two polymer processing additives have different chemistries. For example, there can be a flexible coextruded pipe for providing a protective housing for cables, fluids, sludge or solids, the pipe comprising a pair of telescopically related inner and outer layers, where said inner layer is lubricated with the polymeric material mixture.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: July 18, 2023
    Assignee: Dura-Line LLC
    Inventors: H. Thomas Chung, Fei Fan, Sung Ki Cho, Sam Lukubira, Caleb Michael Spradling, Arturo Valencia
  • Ducts with information modules and methods of use and manufacture thereof
    Patent number: 11609297
    Abstract: The present inventive concept includes a duct system and method for using same to map and locate ducts. A preferred embodiment of the duct system includes a duct, a plurality of electronic information modules and an oversheath at least partially covering the plurality of information modules and fixing the information modules to the duct. The plurality of information modules are configured to emit a positional signal to enable location of the information modules and associated duct(s) and/or mapping of the duct system.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: March 21, 2023
    Assignee: Dura-Line LLC
    Inventors: Timothy A. Grimsley, Thomas McCall