Pipe joint restraint systems
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United States of America Patent
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Jul 19, 2016
Grant Date -
Jan 12, 2012
app pub date -
Jul 8, 2011
filing date -
Jul 9, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
System is a pipe joint restraint for restraining two coupled pipe ends or a pipe end and at least one fitting. The system is used in conjunction with a hubless coupling designed for drainage and sewer pipes of no pressure or low pressure. At least two adjustable circumferential bands with an abrasive grit material adhesively attached to the interior contact portion of the bands are situated one on each side of the hubless coupling; and are fixedly joined by a plurality of spread restrictor braces. The spread restrictor braces contain 45-degree upward bends to create a space between the adjustable circumferential bands and the pipe for the coupling, which serve to prevent separation of the pipe connection under pressure conditions. The pipe joint restraint assembly may be tightened by a fastener assembly containing fully threaded bolts, a barrel nut, and a trunnion.
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