Patent ID: 9649186
Date: 2017-05-16
CPC Classifications: A61F,B29C,B29K,B29L

Claim:
1. A tubular conduit comprising: a flexible tubular portion made from a flexible material and being of unitary construction, the tubular portion having an exterior, an interior, and an axis; an external helical formation extending around the exterior of, and parallel to the axis of, the tubular portion and defining a first region of the tubular portion, the external helical formation being for supporting the tubular portion; and an internal helical formation, protruding inwardly of the interior of the tubular portion and extending parallel to the axis of the tubular portion and defining a second region of the tubular portion, the internal helical formation being for imparting helical flow on fluid passing through the tubular portion, wherein the first region does not overlap completely with the second region.