Drainage unit having a quilt exterior
AssigneeInfiltrator Water Technologies, LLC
InventorsRoy E. Moore, Jr., Paul R. Holbrook, Daniel Swistak
Life of this patent
Estimating the term…
Abstract
A substantially cylindrical drainage unit for use when buried in soil as part of a wastewater leach field comprises a first plastic aggregate mass that is contained within netting, with an optional central perforated pipe. A segmented quilt comprises the exterior surface of the drainage unit which is in contact with soil. Pebble aggregate that is smaller in particle size than the first aggregate is contained with the cavities of the quilt segments. Quilts having different segment shapes and sizes are manufactured by specialized apparatus which creates rectilinear or serpentine seams.
Claims22
A drainage unit, for receiving and collecting water when buried in soil or other particulate material, having a length, a diameter, a nominally cylindrical exterior, and opposing ends, comprising:
- a generally cylindrical mass of first aggregate;
- and, a quilt made of water permeable geotextile running around all or part of the circumference of said first aggregate mass, the quilt comprised of a multiplicity of interconnected segments, each segment comprising an internal cavity containing a second aggregate, wherein the second aggregate has an average particle size which is smaller than the average particle size of the first aggregate.
The drainage unit for receiving and collecting water when buried in soil or other particulate material, having a length, a diameter, a nominally cylindrical exterior, and opposing ends, comprising:
- a generally cylindrical mass of first aggregate;
- and, a quilt made of water permeable geotextile running around all or part of the circumference of said first aggregate mass, the quilt comprised of a multiplicity of interconnected segments, each segment comprising an internal cavity containing a second aggregate;
- wherein the quilt is comprised of a first layer of geotextile which is fastened to a second layer of geotextile at seams formed by a process selected from the group consisting of ultrasonic welding, stitching, adhesive bonding, fusion welding, stapling and combinations thereof;
- wherein the first layer of the geotextile faces the cylindrical mass of aggregate and the second layer of geotextile faces the exterior of the drainage unit, wherein the first layer has a water permeability which is different from the water permeability of the second layer.
A drainage unit, for receiving and collecting water when buried in soil or other particulate material, having a length, a diameter, a nominally cylindrical exterior, and opposing ends, comprising:
- a generally cylindrical mass of first aggregate;
- and, a quilt made of water permeable geotextile running around all or part of the circumference of said first aggregate mass, the quilt comprised of a multiplicity of interconnected segments, each segment comprising an internal cavity containing a second aggregate;
- wherein the quilt comprises two layers of geotextile fastened to each other at seams which define quilt segments, each layer undulating as an effect of the seams and one layer presenting the exterior surface of the drainage unit, wherein the undulation of the exterior surface area layer provides the drainage unit with a surface area per unit length that is greater than the surface area of a same exterior dimension drainage unit having a smooth surface made of the same geotextile which comprises the exterior surface layer.
Dependencies are inferred from the claim text.