Patent ID: 6685391
Filing Date: 2004-02-03
Classification: E01C,E01D,E02B,Y02A

Abstract:
A ground surface cover system for use in controlling erosion caused by water upon a ground surface, the ground surface cover comprising at least one layer upon the ground surface of a plurality of interlocking elements, wherein opposing ends of a pair of opposing said interlocking elements are flexibly interlocked by a flexible interlocking joint, said flexible interlocking joint defining mechanical engagement of an interlocking element tongue transversely extending outward from one said opposing end of a first said interlocking element of said pair to an interlocking channel transversely extending outward from one said opposing end of a second said interlocking element of said pair, such that engagement and disengagement of said tongue and said channel is limited to a first range of positions and angles of said tongue relative to said channel, wherein said first range of positions and angles is less than, and falls within, a full range of positions and angles available to said tongue relative to said channel while said tongue is engaged in said channel.