# US 9,435,480 B2 · Conduit repair system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,435,480 B2 - Document ID: US9435480B2 - Status: Granted - Kind: B2 - Application number: 14/858,233 - Filed: 2015-09-18 - Published: 2016-07-28 - Granted: 2016-09-06 - Earliest claimed: 2015-01-26 - Applicants: Rosetta Higman - Inventors: Rosetta Higman - Web page: https://patentgrep.com/patent/US9435480B2 ## CPC - F16L 55/179: specially adapted for bends, branch units, branching pipes or the like - F16L 55/1653: {and being pressed into contact with the pipe by a tool which moves inside along the pipe} - F16L 55/1656: {materials for flexible liners} - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL ## Abstract A method and apparatus for repairing a leak in a curved section of plumbing includes a conduit repair liner that has a central section made of polyethylene terephthalate and optionally reinforced to conform to a section of plumbing that has up to a 90 degree bend. The conduit repair liner has straps with an end of each of the straps at an edge and a distal end of each of straps has a section of hook and loop material. The conduit repair liner is wrapped around an inflatable carrier after saturating with a bonding agent then both are positioned within the curved section of the plumbing and the inflatable carrier is inflated. After the bonding agent cures, the inflatable carrier is deflated and removed, leaving the conduit repair liner evenly adhered to the inside surfaces of the curved section of the plumbing. ## Claims ### Claim 1 A conduit repair system comprising: a bonding agent; and a conduit repair liner having means for removably affixing to a carrier, surfaces of the conduit repair liner are absorbent and are coated with the bonding agent, at least a central section of the conduit repair liner comprises polyethylene terephthalate so as to be sufficiently resilient as to conform to a section of curved plumbing without forming waves in the surfaces of the conduit repair liner after the conduit repair liner is inserted into the curved plumbing and the carrier is inflated; wherein the central section of the conduit repair liner comprises an outer layer of the polyethylene terephthalate that is adjacent to a middle layer of reinforcement material that is bias-cut, that being adjacent to an inner layer of the polyethylene terephthalate. ### Claim 2 (depends on 1) The conduit repair system of claim 1, wherein section of curved plumbing bends at 90 degrees. ### Claim 3 (depends on 1) The conduit repair system of claim 1, wherein the bonding agent is a resin. ### Claim 4 (depends on 3) The conduit repair system of claim 3, wherein the resin is epoxy. ### Claim 5 (depends on 1) The conduit repair system of claim 1, wherein the central section of the conduit repair liner is made of a two layers of polyethylene terephthalate surrounding a layer of bias-cut reinforcement material. ### Claim 6 (depends on 1) The conduit repair system of claim 1, wherein the conduit repair liner further comprises two end sections and each of the end sections comprises a layer of felt stitched to a layer of woven fiberglass, the woven fiberglass being bias-cut. ### Claim 7 (depends on 1) The conduit repair system of claim 1, wherein the means for removably affixing to the carrier is a plurality of straps, an end of each of the straps affixed to an edge of the conduit repair liner and a distal end of each of the plurality of straps has a section of hook and loop material that mates to a corresponding section of hook and loop material that is affixed to one of the surfaces of the conduit repair liner. ### Claim 8 A method of repairing a crack or leak in a curved section of plumbing, the method comprising: substantially coating a conduit repair liner with a bonding agent, the conduit repair liner having plurality of straps, an end of each of the straps at an edge of the conduit repair liner and a distal end of each of the plurality of straps has a section of hook and loop material, a central section of the conduit repair liner is sufficiently resilient as to conform to a section of curved plumbing and the central section of the conduit repair liner comprises an outer layer of the polyethylene terephthalate that is adjacent to a middle layer of reinforcement material that is bias-cut, that being adjacent to an inner layer of the polyethylene terephthalate; after coating, wrapping the conduit repair liner around an inflatable carrier, engaging the hook and loop material to corresponding hook and loop material on a surface of the conduit repair liner; positioning the inflatable carrier and conduit repair liner within the curved section of the plumbing; inflating the inflatable carrier such that the bonding agent abuts the inside surfaces of the curved section of the plumbing; deflating the inflatable carrier; and removing the inflatable carrier, leaving the conduit repair liner and bonding agent affixed to the inside surfaces of the curved section of the plumbing. ### Claim 9 (depends on 8) The method of claim 8, wherein the curved section of the plumbing bends at 90 degrees. ### Claim 10 (depends on 8) The method of claim 8, wherein the bonding agent is epoxy. ### Claim 11 (depends on 8) The method of claim 8, further comprising: the bonding agent at least partially filling the crack or the leak in the curved section of the plumbing. ### Claim 12 (depends on 8) The method of claim 8, wherein the conduit repair liner further comprises two end sections and each of the end sections comprises a layer of felt stitched to a layer of woven fiberglass. ### Claim 13 A conduit repair system for repairing a curved section of plumbing, the conduit repair system comprising: a bonding agent; and a conduit repair liner having straps for removably affixing the conduit repair liner to a carrier, the conduit repair liner being absorbent and at least a central section of the conduit repair liner comprises polyethylene terephthalate so as to be sufficiently resilient as to conform to a section of plumbing that has a 90 degree bend, thereby conforming to the 90 degree bend of the plumbing without forming waves in a surface of the central section of the conduit repair liner after the conduit repair liner is inserted into the curved section of the plumbing and the carrier is inflated, the conduit repair liner being at least partially coated with the bonding agent; wherein the central section of the conduit repair liner further comprises a layer of bias-cut woven fiberglass bi-axle reinforcement material that is sandwiched between two layers of the polyethylene terephthalate. ### Claim 14 (depends on 13) The conduit repair system of claim 13, wherein the conduit repair liner further comprises two end sections and each of the end sections comprises a layer of felt stitched to a layer of woven fiberglass. ### Claim 15 (depends on 13) The conduit repair system of claim 13, wherein the an end of each of the straps is affixed to an edge of the conduit repair liner and a distal end of each of the of the straps has a section of hook and loop material that mates with and removably holds to a corresponding section of hook and loop material that is affixed to a surface of the conduit repair liner that meets with an inside surface of the curved section of the plumbing. ### Claim 16 (depends on 13) The conduit repair system of claim 13, wherein the carrier is inflatable for forcing the conduit repair liner against an inside surface of the curved section of the plumbing and deflatable for later removal from the plumbing after the conduit repair liner bonds to the inside surface of the curved section of the plumbing.