Patent ID: 11906099
Assignee: PHOENIX ENVIRONMENTAL, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 12:
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.