Patent ID: 7220078

Claim:
An angular ground covering element of artificial stone material having a periphery corresponding to a unification of several square basic elements, the ground covering element comprising projections and recesses around its circumference, retractions on the circumference for drainage of water, said projections and recesses are complementary in shape whereby projections on said element are capable of being received within recesses of an adjacently laid ground covering element, said retractions extend further into the ground covering element than the recesses; said projections and recesses on each circumferential basic element side are defined by a profile, extending from a first end to a second end of the basic element side, said profile being chosen from the group of profiles consisting of: (a) a first profile having a first end neighboring projection adjacent the first end of the basic element side, a second end neighboring projection adjacent the second end of the basic element side and a third projection there-between, said third projection being spaced from the ends, said retraction is positioned between said second projection and one of said first and third projections; (b) a second profile having a first end neighboring projection adjacent the first end of the basic element side and a second end neighboring projection adjacent the second end of the basic element side, said retraction is positioned between said first and second projections; and (c) a third profile having a first projection spaced from said first and second ends and a second end neighboring projection adjacent the second end of the basic element side, said retraction is positioned between said first and second projections.