Patent ID: 8136847
Filing Date: 2012-03-20
Classification: F16L,Y10T

Abstract:
1. A coupling for joining pipe elements together in end to end relation, said coupling comprising: a plurality of segments attached to one another end to end surrounding a central space, at least one of said segments having a cavity therein, said cavity facing said central space and extending lengthwise along said one segment; said one segment further comprising an arcuate key extending lengthwise along said one segment, said arcuate key being positioned in spaced relation to said cavity and projecting inwardly toward said central space; said one segment further comprising a first arcuate shoulder surface extending circumferentially along the length of said one segment, said first arcuate shoulder surface facing said central space and being positioned contiguous with said cavity and between said cavity and said arcuate key, said first arcuate shoulder surface being angularly oriented with respect to an axis oriented perpendicularly to a plane containing said segments, said first arcuate shoulder surface being engageable with an outer surface of one of said pipe elements when said one pipe element is positioned within said central space.