Patents Assigned to Composite Rebar Technologies, Inc.
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Publication number: 20210355640Abstract: Hollow composite dowel bar assemblies, their manufacture, and apparatus for manufacture. The dowel bar assemblies may include an elongate and hollow core, a protective jacket coating at least the sidewall exterior of the core, and a sealing structure coupled with each end of the combined core and jacket, that are configured to protect the core from the environment.Type: ApplicationFiled: December 7, 2020Publication date: November 18, 2021Applicant: Composite Rebar Technologies, Inc.Inventors: Thomas A. Hershberger, Nicholas K. Cray
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Patent number: 10858789Abstract: Hollow composite dowel bar assemblies, their manufacture, and apparatus for manufacture. The dowel bar assemblies may include an elongate and hollow core, a protective jacket coating at least the sidewall exterior of the core, and a sealing structure coupled with each end of the combined core and jacket, that are configured to protect the core from the environment.Type: GrantFiled: September 20, 2017Date of Patent: December 8, 2020Assignee: Composite Rebar Technologies, Inc.Inventors: Thomas A. Hershberger, Nicholas K. Cray
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Patent number: 10508390Abstract: A method for making a plural-component, composite-material, highway dowel-bar including (1) preparing an elongate core train possessing endo-abutting, longitudinally alternating, (a) elongate, high-shear-strength, cylindrical cores having a common cross section, and (b) elongate, but shorter, cylindrical, fibre-reinforced plastic-resin end-plug blanks having opposite ends, and each having a cross section matching the cross section of the cores, (2) using the core train as a longitudinally moving mandrel, pultrusion-forming a fibre-reinforced plastic-resin sleeve continuously and bondedly around the core train so as to produce a pultrusion-result, intermediate, dowel-bar product, and (3) following pultrusion-forming, cross-cutting the intermediate, dowel-bar product at each longitudinal location therein which is intermediate the opposite ends of the end-plug blanks, thereby to form completed dowel bars.Type: GrantFiled: September 10, 2016Date of Patent: December 17, 2019Assignee: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Matthew H. Noble, Trent J. Garber
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Publication number: 20180080181Abstract: Hollow composite dowel bar assemblies, their manufacture, and apparatus for manufacture. The dowel bar assemblies may include an elongate and hollow core, a protective jacket coating at least the sidewall exterior of the core, and a sealing structure coupled with each end of the combined core and jacket, that are configured to protect the core from the environment.Type: ApplicationFiled: September 20, 2017Publication date: March 22, 2018Applicant: Composite Rebar Technologies, Inc.Inventors: Thomas A. Hershberger, Nicholas K. Cray
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Publication number: 20170218630Abstract: A rebar structure for concrete reinforcement may include an elongate tubular central wall portion having an inside surface and an outside surface. The central wall portion may be formed circumferentially around a core axis and may include glass or carbon fibers mostly being oriented longitudinally parallel to the core axis. The rebar structure may include an inner wall portion bonded to the inside surface of the central wall portion. The inner wall portion may include glass or carbon fibers and may have a higher percentage of fibers oriented non-parallel to the core axis as compared to the central wall portion.Type: ApplicationFiled: April 17, 2017Publication date: August 3, 2017Applicant: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Thomas S. Ohnstad, Thomas A. Hershberger, Gregory A. Zjaba, Richard A. Schulte, Sean Walsh
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Patent number: 9624667Abstract: A rebar structure for concrete reinforcement may include an elongate tubular central wall portion having an inside surface and an outside surface. The central wall portion may be formed circumferentially around a core axis and may include glass or carbon fibers mostly being oriented longitudinally parallel to the core axis. The rebar structure may include an inner wall portion bonded to the inside surface of the central wall portion. The inner wall portion may include glass or carbon fibers and may have a higher percentage of fibers oriented non-parallel to the core axis as compared to the central wall portion.Type: GrantFiled: September 17, 2015Date of Patent: April 18, 2017Assignee: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Thomas S. Ohnstad, Thomas A. Hershberger, Gregory A. Zjaba, Richard A. Schulte, Sean Walsh
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Publication number: 20170089373Abstract: A dowel bar spring clip may include a central torsion spring portion having leg extensions. The leg extensions may be configured to releasably engage a dowel bar basket. The torsion spring portion may be configured to securely encompass a dowel bar, such that the dowel bar is secured to the dowel bar basket by the clip. The dowel bar spring clip may be removable, for example to replace or reposition the dowel bar relative to the basket.Type: ApplicationFiled: September 26, 2016Publication date: March 30, 2017Applicant: Composite Rebar Technologies, Inc.Inventor: Richard A. Schulte
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Publication number: 20170058463Abstract: A method for making a plural-component, composite-material, highway dowel-bar including (1) preparing an elongate core train possessing endo-abutting, longitudinally alternating, (a) elongate, high-shear-strength, cylindrical cores having a common cross section, and (b) elongate, but shorter, cylindrical, fibre-reinforced plastic-resin end-plug blanks having opposite ends, and each having a cross section matching the cross section of the cores, (2) using the core train as a longitudinally moving mandrel, pultrusion-forming a fibre-reinforced plastic-resin sleeve continuously and bondedly around the core train so as to produce a pultrusion-result, intermediate, dowel-bar product, and (3) following pultrusion-forming, cross-cutting the intermediate, dowel-bar product at each longitudinal location therein which is intermediate the opposite ends of the end-plug blanks, thereby to form completed dowel bars.Type: ApplicationFiled: September 10, 2016Publication date: March 2, 2017Applicant: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Matthew H. Noble, Trent J. Garber
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Patent number: 9440400Abstract: A method for making a plural-component, composite-material, highway dowel-bar including (1) preparing an elongate core train possessing endo-abutting, longitudinally alternating, (a) elongate, high-shear-strength, cylindrical cores having a common cross section, and (b) elongate, but shorter, cylindrical, fiber-reinforced plastic-resin end-plug blanks having opposite ends, and each having a cross section matching the cross section of the cores, (2) using the core train as a longitudinally moving mandrel, pultrusion-forming a fiber-reinforced plastic-resin sleeve continuously and bondedly around the core train so as to produce a pultrusion-result, intermediate, dowel-bar product, and (3) following pultrusion-forming, cross-cutting the intermediate, dowel-bar product at each longitudinal location therein which is intermediate the opposite ends of the end-plug blanks, thereby to form completed dowel bars.Type: GrantFiled: September 21, 2013Date of Patent: September 13, 2016Assignee: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Matthew H. Noble, Trent J. Garber
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Publication number: 20160076249Abstract: A rebar structure for concrete reinforcement may include an elongate tubular central wall portion having an inside surface and an outside surface. The central wall portion may be formed circumferentially around a core axis and may include glass or carbon fibers mostly being oriented longitudinally parallel to the core axis. The rebar structure may include an inner wall portion bonded to the inside surface of the central wall portion. The inner wall portion may include glass or carbon fibers and may have a higher percentage of fibers oriented non-parallel to the core axis as compared to the central wall portion.Type: ApplicationFiled: September 17, 2015Publication date: March 17, 2016Applicant: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Thomas S. Ohnstad, Thomas A. Hershberger, Gregory A. Zjaba, Richard A. Schulte, Sean Walsh
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Patent number: 9156210Abstract: Apparatus possessing elongate, long-axially aligned componentry for making hollow, composite-material rebar including (a) a hollow mandrel disposed upstream in the apparatus, (b) a hollow pultrusion die circumsurrounding the mandrel for forming a composite-material hollow core in the space between it and the mandrel, and (c) a hollow, continuous-transfer-molding die spaced downstream from the pultrusion die, having a central long axis about which it is rotatable, operable to form, along the length of a core which has been formed in the pultrusion die, (1) an elongate, composite-material, core-circumsurrounding, hollow sleeve having an outer surface, and (2), unitarily with the sleeve, and in a manner distributed along the length of the sleeve's outer surface, an external-purchase-enhancing structure possessing radial-dimensionality.Type: GrantFiled: July 30, 2014Date of Patent: October 13, 2015Assignee: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Thomas S. Ohnstad, Matthew H. Noble, Trent J. Garber, Thomas A. Hershberger
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Patent number: 9149993Abstract: A method of making an elongate, composite-material, hollow rebar structure including (a) forming an elongate, composite-material, hollow core, (b) in association with such forming, preparing along the core's length an elongate, composite-material, core-circumsurrounding, hollow sleeve having inner and outer surfaces, (c) in association with such preparing, creating, unitarily with the sleeve, and in a manner distributed along the length of the sleeve's outer surface, an external-purchase-enhancing structure possessing radial-dimensionality, and (d) bonding the inner surface of the sleeve to the outer surface of the core.Type: GrantFiled: July 30, 2014Date of Patent: October 6, 2015Assignee: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Thomas S. Ohnstad, Matthew H. Noble, Trent J. Garber, Thomas A Hershberger
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Publication number: 20140021647Abstract: A method for making a plural-component, composite-material, highway dowel-bar including (1) preparing an elongate core train possessing endo-abutting, longitudinally alternating, (a) elongate, high-shear-strength, cylindrical cores having a common cross section, and (b) elongate, but shorter, cylindrical, fibre-reinforced plastic-resin end-plug blanks having opposite ends, and each having a cross section matching the cross section of the cores, (2) using the core train as a longitudinally moving mandrel, pultrusion-forming a fibre-reinforced plastic-resin sleeve continuously and bondedly around the core train so as to produce a pultrusion-result, intermediate, dowel-bar product, and (3) following pultrusion-forming, cross-cutting the intermediate, dowel-bar product at each longitudinal location therein which is intermediate the opposite ends of the end-plug blanks, thereby to form completed dowel bars.Type: ApplicationFiled: September 21, 2013Publication date: January 23, 2014Applicant: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Matthew H. Noble, Trent J. Garber
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Patent number: 8591139Abstract: A plural-component, composite-material highway dowel bar and an associated fabrication methodology. The dowel bar includes an elongate, solid-cylindrical, high-shear-strength core bar, preferably steel, and an elongate, fiber-reinforced plastic-resin jacket, including an elongate, pultrusion-formed, tubular sleeve, and sleeve-received, opposite-end, end-well sleeve end plugs, fully surrounding and protectively covering the core bar.Type: GrantFiled: January 31, 2013Date of Patent: November 26, 2013Assignee: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Matthew H. Noble, Trent J. Garber
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Publication number: 20130202355Abstract: A plural-component, composite-material highway dowel bar and an associated fabrication methodology. The dowel bar includes an elongate, solid-cylindrical, high-shear-strength core bar, preferably steel, and an elongate, fibre-reinforced plastic-resin jacket, including an elongate, pultrusion-formed, tubular sleeve, and sleeve-received, opposite-end, end-well sleeve end plugs, fully surrounding and protectively covering the core bar.Type: ApplicationFiled: January 31, 2013Publication date: August 8, 2013Applicant: COMPOSITE REBAR TECHNOLOGIES, INC.Inventor: Composite Rebar Technologies, Inc.
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Publication number: 20120066994Abstract: Elongate, composite-material, hollow rebar structure, along with associated components, related fabrication apparatus, and apparatus-implemented, rebar-structure-making methodology. The rebar structure has a long axis, and includes (a) an elongate, hollow core centered on that long axis, (b) an elongate, hollow sleeve having inner and outer surfaces, circumsurrounding the core along the core's length, with the sleeve's inner surface bonded to the core's outer surface along the length thereof, and (c) longitudinally distributed, radial-dimensionality, external-purchase-enhancing structure formed unitarily with the sleeve's outer surface along the length thereof. The bond existing between the core and the sleeve takes the form of a single-cure, reverse-temperature-gradient-cure, plastic-material, molecular bond.Type: ApplicationFiled: August 22, 2011Publication date: March 22, 2012Applicant: Composite Rebar Technologies, Inc.Inventors: Robert C. Gibson, Thomas S. Ohnstad, Matthew H. Noble, Trent J. Garber, Thomas A. Hershberger, John R. Hillman