Gutter pipe elbow for rain water, has nestable segment of least diameter and receiver segment of larger inner diameter, both having cylindrical shape to extend curved central segment through respective transition zones

摘要

The elbow has a receiving zone and a nestable zone that are constituted of unbend end segments. A nestable segment (4) of least diameter and a receiver segment (6) of larger inner diameter have cylindrical shape along their entire length to extend a curved central segment (2) through transition zones (5, 7) that taper and widen in a conical manner, respectively.