Artificial paving stone with identical spacer elements having a tooth and a tooth recess

Claim 1

An artificial concrete stone for strengthening of traffic-bearing surfaces in the open, in which said stone has integrally formed, comprising a plurality of completely identical spacer elements provided on edge surfaces of said stone, said edge surfaces being disposed perpendicularly to a laying plane and extending substantially parallel to one another; individual edge surface of said stone having a length, parallel to the laying plane, which is a whole number multiple of a smallest basic dimension; each segment of an edge surface element which has a length corresponding to the smallest basic dimension being provided with said spacer element; a central axis of said spacer element lying parallel to the laying plane and perpendicular to the corresponding edge surface and, being positioned in the middle of the corresponding edge surface segment; end surfaces of said spacer elements having, in the direction of said laying plane and of mutually facing edge surfaces, a tooth and a recessed contact surface for the tooth of the adjacently laid stone; said recessed contact surface corresponding to the size of said tooth of the adjacently laid stone and enclosing said tooth of the adjacently laid stone on both sides in the direction parallel to said laying plane; flanks of said tooth of the adjacently laid stone and of said recessed contact surface each enclosing an angle of at least 90 degrees with a bisector of said angle being essentially parallel to a line perpendicular to the corresponding edge surface; the sequence of said tooth and recess, in one peripheral direction of said stone, being the same for all spacer elements; wherein said spacers elements on the adjacent laid stones cooperate to provide wide grooves between the adjacently laid stones.