Patents Assigned to Dura-Line
  • 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
  • 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
  • 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
  • Patent number: 10870382
    Abstract: This disclosure discloses various technologies for loading, transporting, and unloading of loads, such as reels, cylinders, containers, and others.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: December 22, 2020
    Assignee: Dura-Line Corporation
    Inventor: Timothy A. Grimsley
  • Patent number: 10429267
    Abstract: Disclosed herein is a pipe assembly containing a pipe, an insulating jacket coupled to the pipe via an attachment base; and a tracer wire within the insulating jacket. The width of the attachment base is greater than width of the insulating jacket. Also disclosed herein are methods of locating a pipe concealed below a ground surface, and detecting the presence and the position of a leak in a pipe concealed below a ground surface.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: October 1, 2019
    Assignee: DURA-LINE CORPORATION
    Inventor: Timothy A Grimsley
  • Patent number: 10197660
    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: April 13, 2017
    Date of Patent: February 5, 2019
    Assignee: DURA-LINE CORPORATION
    Inventors: Timothy A. Grimsley, Thomas McCall
  • Publication number: 20180194262
    Abstract: This disclosure discloses various technologies for loading, transporting, and unloading of loads, such as reels, cylinders, containers, and others.
    Type: Application
    Filed: January 5, 2018
    Publication date: July 12, 2018
    Applicant: Dura-Line Corporation
    Inventor: Timothy A. GRIMSLEY
  • Patent number: 9915380
    Abstract: Methods and devices related to multi-layer tubular conduit are disclosed. The method of making the multi-layer tubular conduit includes providing a hermetically sealed metal tube, inserting a thermoplastic conduit within the tube, and surrounding the exterior of the tube with an overjacket. The multi-layer tubular conduit device includes three layers: a layer of thermaplastic conduit, a layer of hermetically sealed metal tube, and a layer of overjacket. The three layers are arranged coaxially such that they share a common central axis. The method of use includes installing a multi-layer tubular conduit device in a public or non-public environment. The multi-layer tubular conduit offers mechanical protection from harsh and/or hostile environments while still offering the flexibility of traditional conduit.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: March 13, 2018
    Assignee: Dura-Line Corporation
    Inventors: Scott Gardner, Timothy A. Grimsley
  • Patent number: 9625560
    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: April 28, 2016
    Date of Patent: April 18, 2017
    Assignee: DURA-LINE CORPORATION
    Inventors: Timothy A. Grimsley, Thomas McCall
  • Publication number: 20160377503
    Abstract: Disclosed herein is a pipe assembly containing a pipe, an insulating jacket coupled to the pipe via an attachment base; and a tracer wire within the insulating jacket. The width of the attachment base is greater than width of the insulating jacket. Also disclosed herein are methods of locating a pipe concealed below a ground surface, and detecting the presence and the position of a leak in a pipe concealed below a ground surface.
    Type: Application
    Filed: June 22, 2016
    Publication date: December 29, 2016
    Applicant: DURA-LINE CORPORATION
    Inventor: Timothy A. Grimsley
  • Patent number: 9383427
    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: January 3, 2014
    Date of Patent: July 5, 2016
    Assignee: Dura-Line Corporation
    Inventors: Timothy A Grimsley, Thomas McCall
  • Publication number: 20140191845
    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: Application
    Filed: January 3, 2014
    Publication date: July 10, 2014
    Applicant: Dura-Line Corporation
    Inventors: Timothy A Grimsley, Thomas McCall
  • Publication number: 20140191844
    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: Application
    Filed: January 2, 2014
    Publication date: July 10, 2014
    Applicant: Dura-Line Corporation
    Inventors: Timothy A. Grimsley, Thomas McCall
  • Patent number: 4892442
    Abstract: An innerduct is disclosed which can fit inside a preexisting conduit and extend along the length thereof or can be directly buried with a plow or in an open trench, for receiving transmission cables and, in particular, fiber optic cables. The innerduct is formed by coextruding first and second materials, the material for the inner portion of the innerduct including a lubricous material impregnated therein so that friction is reduced between the inner surface of the interduct and cables which are pulled therethrough. Ribs can be provided on the inner and outer surfaces of the innerduct of the duct can be formed with undulated walls so as to further reduce friction between same and cables slid therethrough by minimizing the surface contact between these elments. The ribs and/or undulations also faciliate the dissipation of heat due to friction of assembly, heat during the extrusion process, and from ambient sources of heat.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: January 9, 1990
    Assignee: Dura-Line
    Inventor: John Shoffner