Abstract Tesselation or paving element or tile comprising an underpart having two by two symmetrical side surfaces, of which one pair is converging and the other diverging in the direction of the upper surface, said part carrying at its upper surface a prism, the base of which is congruent with the upper surface, wherein said prismatic part makes up at least one-third, preferably more than half of the height of the element in order to improve the mutual interlocking in directions perpendicular to the surface of the paving as well as making the joints impenetrable for loose underlayer. Tesselation of paving element or tile having parallel upper surfaces and bottom faces and oblique, two by two symmetrical side surfaces, of which at least one pair is converging in the upper surface and at least another pair in the bottom face, are known. Thus, these bodies make up shortened cross prisms, the axis of which is parallel with the upper surface and the bottom face. By joining these bodies together the elements are fixed in upwards as well as in downwards direction, when the tesselated or tiled pattern has been arranged. Each element may on its upper surface as well as on its bottom face carry a prism, the base of which is corresponding to or smaller than the surface in question, said base having such a form that the elements when joined may form a continuous surface. By these known elements the height of the prism in question is small in comparison with that of the cross prism.
Units for use in tesselation, as paving elements, as tiles and the like covering, each of the units consisting of a prism having parallel top and bottom surfaces, the upper at least onethird portion of each of said units having pairs of symmetrical, parallel side walls the outer surfaces of which are normal to the top and bottom surfaces, and the lower remaining portion of said unit consisting of oblique in pairs of symmetrical planar side walls of which at least one pair of the oblique planar side walls is converging from the bottom surface and at least the other pair of the oblique planar side walls is diverging from the bottom surface, said units being assembled with the upper at least onethird portion of the side walls of adjacent said units in closely spaced parallel relationship.
Claim 2
Dependent Claim
137 words
Units for use in tesselation, as paving elements, as tiles and the like covering, each of the units consisting of a prism having parallel top and bottom surfaces, the upper at least onethird portion of each of said units having pairs of symmetrical, parallel side walls the outer surfaces of which are normal to the top and bottom surfaces, and the lower remaining portion of said unit consisting of oblique in pairs of symmetrical planar side walls of which at least one pair of the oblique planar side walls is converging from the bottom surface and at least the other pair of the oblique planar side walls is diverging from the bottom surface, said units being assembled with the upper at least onethird portion of the side walls of adjacent said units in closely spaced parallel relationship.
Claim 3
Dependent Claim
22 words
The invention defined in claim 1 wherein the upper portion of each unit exceeds half of the total height of the unit.
Claim 4
Dependent Claim
17 words
The invention defined in claim 1 wherein the top and bottom surfaces of each unit are square.