Fabricating a drainage unit having a quilted exterior surface
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United States of America Patent
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Mar 1, 2016
Grant Date -
N/A
app pub date -
Jul 13, 2014
filing date -
Jul 12, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A substantially cylindrical drainage unit for use when buried in soil as part of a wastewater leach field comprises a first plastic bead aggregate mass, optionally with a central perforated pipe, surrounded by a segmented-quilt exterior surface. Quilts are captured around the drainage unit by straps, a circumscribing netting sleeve, or by being themselves in the form of tubular sleeves. Preferred rectangular quilt segments contain a second pebble aggregate that is smaller than the first aggregate. Quilts are fabricated by mating two layers of geotextile and inserting the second aggregate into channels or cavities that are defined by seams that join the layers to each other.
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