Positive seal coupling system

摘要

A hollow coupling for joining together two pipe ends and having a center, two coupling ends, and an inner profile. The inner profile can include a serrated section having a plurality of threads extending radially around the inner diameter of the coupling, a curved section proximate the serrated section and defining a recess for the deposition of debris and other material during installation of a pipe into the coupling, a smooth section adjacent an end of the coupling and having a diameter slightly less than the outside diameter of a pipe to be inserted into the coupling, and a transition section between the curved section and the smooth section, the transition section having a smooth, rounded profile that minimizes stress concentrations.

主权项

1. A hollow coupling for joining together two pipe ends and having a center, two coupling ends, and an inner profile, the coupling having a longitudinal axis, the inner profile comprising:
a serrated section having a plurality of threads extending circumferentially around the inner diameter of the coupling; a curved section proximate the serrated section, and having a surface that curves radially outward relative to the longitudinal axis from the serrated section toward one of the two coupling ends; a smooth section adjacent an end of the coupling; and a transition section between the curved section and the smooth section, the transition section curving radially inward toward the longitudinal axis from the curved section to the smooth section, and having a smooth, rounded profile that minimizes stress concentrations.