Martin J Simpson

US Patent:

55648649, Oct 15, 1996

Filed:

Mar 7, 1994

Appl. No.:

8/207008

Inventors:

William J. Simpson - Arlington Heights IL
Martin J. Simpson - Chicago IL

Assignee:

Claymax Corporation - Chicago IL

International Classification:

E02D 312
B09B 100
B32B 306

US Classification:

405270

Abstract:

A flexible clay liner in roll form for use on steep slopes. The liner includes a layer of geotextiles. The geotextiles are stitched together in rows of stitches which extend along the length of the liner. The thread used to make the stitching is a multifilament thread treated with a resin to prevent wicking through the liner. The spacing of the rows of stitches and the frequency of stitches along the rows are sufficient to transfer shear stresses through the bentonite layers, thus preventing the bentonite from becoming a shear plane.

US Patent:

56540647, Aug 5, 1997

Filed:

Jun 4, 1996

Appl. No.:

8/658222

Inventors:

William J. Simpson - Arlington Heights IL
Martin J. Simpson - Chicago IL

Assignee:

Claymax Corporation - Chicago IL

International Classification:

B32B 302
B32B 306
B32B 516

US Classification:

428 86

Abstract:

A flexible clay liner in roll form for use on steep slopes. The liner includes a layer of geotextiles. The geotextiles are stitched together in rows of stitches which extend along the length of the liner. The thread used to make the stitching is a multifilament thread treated with a resin to prevent wicking through the liner. The spacing of the rows of stitches and the frequency of stitches along the rows are sufficient to transfer shear stresses through the bentonite layers, thus preventing the bentonite from becoming a shear plane.