Filament-wound composite coupling
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United States of America Patent
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Sep 19, 2006
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N/A
app pub date -
Feb 18, 2004
filing date -
Feb 18, 2004
priority date (Note) -
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Abstract
A filament-wound composite coupling for use in assembling a restrained joint between large diameter pipes with complementary retaining grooves, such as 16 inch or larger outer diameter polyvinyl chloride pipes. The coupling has first and second ends and ported retaining grooves associated with each end. Preferably, the coupling also includes O-ring seals and a pipe stop to index the pipes to be coupled. The composite coupling has a cylindrical composite body with a plurality of concentrically arranged layers of wound filaments in a thermoset plastic matrix. Each of the layers is characterized by a winding angle opposing the winding angle of the adjoining layers.
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