# US 11,906,099 B2 · Seal on the interstice of double-walled fiberglass pipe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,099 B2 - Document ID: US11906099B2 - Status: Granted - Kind: B2 - Application number: 17/040,498 - Filed: 2019-03-21 - Published: 2021-11-25 - Granted: 2024-02-20 - Earliest claimed: 2018-03-21 - Assignees: Phoenix Environmental, Ltd. - Applicants: Phoenix Environmental, Inc. - Inventors: Casey Joe Smith; Blake A. Bowers; Michael B. Goodwin; Makena Hale - Web page: https://patentgrep.com/patent/US11906099B2 ## CPC - F16L 7/02: and sealing the pipes or cables inside the other pipes, cables or sleeves - F16L 9/20: {Pipe assemblies} - F16L 25/14: Joints for pipes of different diameters or cross-section - F16L 37/56: for double-walled or multi-channel pipes {or pipe assemblies} - F16L 37/565: {Concentric pipes} - F16L 39/005: {for concentric pipes} - Y10T 29/49826: Assembling or joining - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A method of sealing the interstice in double-walled pipe includes the steps of applying a first sealing piece to an inner pipe of the double-walled pipe, wherein the first sealing piece covers a portion of the circumference of the inner pipe; and applying a second sealing piece to the inner pipe of the double-walled pipe, wherein the second sealing piece covers the remainder of the circumference of the inner pipe. The method further includes the step of attaching the first sealing piece to the second sealing piece forming a sealer; wherein the sealer is disposed in an annular space located between the inner pipe and an outer pipe. A sealer configured to seal an opening between pipes in a double-walled pipe includes a first sealing piece having a rounded cross-section with an attachment portion configured to engage a corresponding attachment portion disposed on a second sealing piece. ## Claims ### Claim 1 A method of sealing an annular space in double-walled pipe including the following steps: applying a first sealing piece to an inner pipe of double-walled pipe, wherein the first sealing piece covers a portion of the circumference of the inner pipe; applying a second sealing piece to the inner pipe of double-walled pipe, wherein the second sealing piece covers the remainder of the circumference of the inner pipe, wherein at least one of the first sealing piece and the second sealing piece includes a thread disposed on at least one of a top surface and a front surface; and attaching the first sealing piece to the second sealing piece forming a sealer; wherein the sealer is disposed in the annular space located between the inner pipe and an outer pipe. ### Claim 2 (depends on 1) The method of claim 1, wherein the first sealing piece and the second sealing piece each contain a lip portion configured to engage with an outer rim on the outer pipe forming a seal around the annular space. ### Claim 3 (depends on 2) The method of claim 2, wherein a portion of the sealer, opposite the lip portion, extends into the annular space between the inner pipe and the outer pipe. ### Claim 4 (depends on 1) The method of claim 1, wherein greater than or equal to half of a length of the sealer is disposed in the annular space. ### Claim 5 (depends on 1) The method of claim 1, wherein the first sealing piece and the second sealing piece are connected with tongue and groove portions located on each of the first sealing piece or the second sealing piece. ### Claim 6 (depends on 1) The method of claim 1, wherein the first sealing piece and the second sealing piece are connected by an adhesive, screws, clamps, O rings, retainer screws, or a combination thereof. ### Claim 7 (depends on 1) The method of claim 1, wherein the sealer is removably attached to the inner piper and the outer pipe. ### Claim 8 (depends on 1) The method of claim 1, wherein an outer surface of the sealer is flush with an inner surface of the outer pipe. ### Claim 9 (depends on 1) The method of claim 1, wherein an inner surface of the sealer is flush with an outer surface of the inner pipe. ### Claim 10 (depends on 1) The method of claim 1, wherein the sealer comprises a material compatible with that of double-walled pipe. ### Claim 11 A sealer configured to seal an opening between pipes in a double-walled pipe, the sealer comprising: a first sealing piece having a rounded cross-section with an attachment portion configured to engage a corresponding attachment portion disposed on a second sealing piece, wherein at least one of the first sealing piece and the second sealing piece includes a thread disposed on at least one of a top surface and a front surface, wherein the first sealing piece and the second sealing piece are connected with a tongue and groove configuration. ### Claim 12 (depends on 11) The sealer of claim 11, wherein the first sealing piece and the second sealing piece are connected via an adhesive, screws, clamps, or a combination thereof. ### Claim 13 A double-walled pipe having a sealer between an annular space, comprising: an inner pipe; an outer pipe disposed around the inner pipe, wherein the inner pipe extends beyond the outer pipe; a first sealing piece having a round cross-section with an attachment portion configured to engage a corresponding attachment portion on a second sealing piece, wherein the first sealing piece and the second sealing piece form the sealer, wherein at least one of the first sealing piece and the second sealing piece includes a thread disposed on at least one of a top surface and a front surface; wherein the sealer is disposed in the annular space between the inner pipe and the outer pipe; and wherein the first sealing piece and the second sealing piece are connected with a tongue and groove configuration. ### Claim 14 (depends on 13) The double-walled pipe of claim 13, wherein the sealer is removably attached to the inner pipe and the outer pipe. ### Claim 15 (depends on 13) The double-walled pipe of claim 13, wherein the first sealing piece and the second sealing piece each contain a lip portion configured to engage with an outer rim on the outer pipe forming a seal around the annular space. ### Claim 16 (depends on 13) The double-walled pipe of claim 13, wherein an outer surface of the sealer is flush with an inner surface of the outer pipe. ### Claim 17 (depends on 13) The double-walled pipe of claim 13, wherein an inner surface of the sealer is flush with an outer surface of the inner pipe. ### Claim 18 (depends on 13) The double-walled pipe of claim 13, wherein the first sealing piece and the second sealing piece include a first thread disposed on a top surface and a second thread disposed on a front surface. ### Claim 19 (depends on 18) The double-walled pipe of claim 18, wherein at least one of the threads disposed on the front surface of the first sealing piece and the second sealing piece is connected to an access port extending from the thread and along a longitudinal axis of the sealer configured to provide access to the annular space in double-walled pipe. ### Claim 20 A method of sealing an annular space in double-walled pipe including the following steps: applying a sealing piece to an inner pipe of double-walled pipe, wherein the sealing piece covers a circumference of the inner pipe, wherein the sealing piece includes a thread disposed on at least one of a top surface and a front surface; wherein the sealing piece is disposed in the annular space located between the inner pipe and an outer pipe, wherein the sealing piece comprises greater than or equal to two pieces, and wherein when joined together, the pieces form the sealing piece, wherein the first sealing piece and the second sealing piece are connected with a tongue and groove configuration.