Patent ID: 8061739

Claim:
A thermal insulation device comprising a screwed junction between two sections of pipe, wherein each of the two sections of pipe comprises: an outer pipe surrounding an inner pipe between which thermal insulation material is positioned, said inner pipe of each said section being assembled together by said screwed junction, one of said two sections delimiting a male portion and the other of said sections delimiting a female portion, said two portions being fitted into one another in order to delimit said screwed junction; wherein said male portion comprises: said inner pipe, a narrowed tubular part connected to said inner pipe, a diameter of said narrowed tubular part being less than a diameter of said outer pipe, said male portion incorporating an insulating material; wherein said female portion comprises: a part of said outer pipe, an intermediate tubular part connecting said inner pipe to said outer pipe, an inner diameter of said intermediate tubular part being greater than the outer diameter of said narrowed tubular part of said male portion; and a thermally insulating material being inserted between said part of the outer pipe and said intermediate tubular part.