Patent ID: 9631758
Date: 2017-04-25
CPC Classifications: B29C,B29K,B29L,F16L

Claim:
1. Coupling piece for an outer end of a multilayered conduit, comprising: a coupling pipe; a radially upright wall formed on and extending from an outer side of the coupling pipe, wherein the wall includes a widened portion that is wider than the wall in an axial direction of the pipe at a radial distance from the outer side, wherein the outer side of the coupling pipe, the upright wall and the widened portion form an annular insertion space into which an outer end of the multilayered conduit is directly insertable, and wherein the radial distance between the widened portion of the wall and the outer side of the coupling pipe, at a position of entry to the annular insertion space is equal to or greater than a wall thickness of the multilayered conduit; an adjacent reinforcing layer of reinforced plastic or of metal on an inner wall of the coupling pipe, the reinforcing layer including a material of greater strength than the coupling pipe; and axial engaging elements provided on the adjacent reinforcing layer, wherein the inner wall is provided with axial connecting elements which respectively correspond with and connect to the axial engaging elements.