David N Wilkinson

US Patent:

49603493, Oct 2, 1990

Filed:

Jul 31, 1989

Appl. No.:

7/387653

Inventors:

Gary L. Willibey - Dunwoody GA
John W. Hawkins - Stone Mountain GA
Russell P. Harp - Lithia Springs GA
David M. Wilkinson - Stone Mountain GA

Assignee:

Nicolon Corporation - Norcross GA
Georgia Duck and Cordage Mill - Scottdale GA

International Classification:

E02D 2902

US Classification:

405262

Abstract:

Woven geotextile grid for earth reinforcement applications. The grid is formed of woven fabric which is coated with a suitalbe polyvinylchloride or other plastic coating. The fabric is formed of a plurality of spaced-apart pick yarn bundles which are interwoven with a plurality of spaced-apart warp yarn bundles. The pick yarn bundles are held in place in the warp yarn bundles with locking yarns which run parallel to the pick yarns and which are positioned adjacent to the edges of the pick yarn bundles. The warp yarns extend between the pick yarn bundles and locking yarns to lock the pick yarn bundles into place. A plurality of pairs of leno yarns oriented parallel to the warp yarns additionally strenghten the fabric by interlocking with one another in the spaces between pick yarn bundles and locking yarns. The result is a grid which has wide lateral and longitudinal members that lock together to form large interstices through which soil and water may penetrate. Strength of the grid may be adjusted laterally or longitudinally by varying (1) the number, size and composition of pick yarns and warp yarms; (2) the spacing between pick yarn bundles and warp yarn bundles and (3) the number, position and composition of the leno yarns.

US Patent:

50912470, Feb 25, 1992

Filed:

Sep 5, 1989

Appl. No.:

7/402971

Inventors:

Gary L. Willibey - Dunwoody GA
John W. Hawkins - Stone Mountain GA
Russell P. Harp - Lithia Springs GA
David M. Wilkinson - Stone Mountain GA

Assignee:

Nicolon Corporation - Norcross GA
Georgia Duck and Cordage Mill - Scottdale GA

International Classification:

B32B 310
B32B 508
E02D 1720
D03D 1900
E02B 312

US Classification:

428255

Abstract:

Woven geotextile grid for earth reinforcement applications. The grid is formed of woven fabric which is coated with a suitable polyvinylchloride or other plastic coating. The fabric is formed of a plurality of spaced-apart pick yarn bundles which are interwoven with a plurality of spaced-apart warp yarn bundles. The pick yarn bundles are held in place in the warp yarn bundles with locking yarns which run parallel to the pick yarns and which are positioned adjacent to the edges of the pick yarn bundles. The warp yarns extend between the pick yarn bundles and locking yarns to lock the pick yarn bundles into place. A plurality of pairs of leno yarns oriented parallel to the warp yarns additionally strengthen the fabric by interlocking with one another in the spaces between pick yarn bundles and locking yarns. The result is a grid which has wide lateral and longitudinal members that lock together to form large interstices through which soil and water may penetrate. Strength of the grid may be adjusted laterally or longitudinally by varying (1) the number, size and composition of pick yarns and warp yarns; (2) the spacing between pick yarn bundles and warp yarn bundles and (3) the number, position and composition of the leno yarns.