Patent ID: 9099857
Filing Date: 2015-08-04
Classification: B29C,H02G

Abstract:
1. A tubular helical support for the radial support of resiliently expanded tubing, made of at least one extruded element, which is wound to form a plurality of windings having an internal hollow region, a first portion of the extruded element being connected to the plurality of windings at a first end of the plurality of windings and extending through the internal hollow region of the plurality of windings along a longitudinal direction of the plurality of windings to a location proximate a second end of the plurality of windings, the extruded element is provided on both sides with connection portions with complementary contours, the adjacent connection portions of two adjacent windings overlapping radially at least in portions and comprising connection surfaces that are connected by a connection seam, that are not transparent to laser beams, and that the connection surfaces of the adjacent windings overlap in the overlap region which extends along a winding direction which is perpendicular to the longitudinal direction, the connection seam being a laser connection seam that mainly extends in the overlap region, the entire laser connection seam of the two adjacent windings of the plurality of windings is located between an exterior of the two adjacent windings of the plurality of windings and the internal hollow region of the two adjacent windings of the plurality of windings and is not accessible from the exterior of the two adjacent windings of the plurality of windings.