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US 4,907,909 AGranted
Paving stone set
OwnerWilli Ruckstuhlinventor
Life of this patent
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OwnerWilli Ruckstuhlinventor
Estimating the term…
The paving stone set consists of stones 11-16 each with six lateral boundary surfaces 1-6, 17-22. Four of these boundary surfaces 1 and 4; 3 and 5; 18 and 21; 19 and 22 are parallel to one of the other of the four surfaces, while the remaining two surfaces 2 and 6; 17 and 20 define planes which intersect at an acute angle. On the straight edges, the stones 11-13 are laid alternatingly. A joint pattern is created with expansion joints, which do not stand vertically to the support joints. The expansion joints are formed from two wedges directed opposite to one another, and therefore have an effect which is irregular in comparison with the support joints. The slotted boundary surfaces 2, 6 make it possible to lay the stones 11-13 according to the sloping angles selected in curves with small radii chosen as desired, whereby the wedge-shaped joints close gradually. The stones 14-16 serve as a supplementary curve set, and make possible the laying of Roman arrow patterns, as well as an Archimedean spiral. The paving stone set can be quickly and simply laid down without trimming the stones.
A paving stone set comprising at least six prefabricated pavement stones, each of said pavement stones having a flat bottom and a substantially structures top surface and, perpendicular thereto, six substantially planar, lateral boundary surfaces, four of said boundary surfaces being parallel to one of the other of said four boundary surfaces, and the remaining two boundary surfaces being opposite one another at an acute angle, at least three of said stones, when being seen in top view, each having a rectangular portion on one half and a trapezoidal portion on the other half with the lateral boundary surfaces defining two sides and a shorter base of said trapezoidal portion and, at least three further stones, when being seen in top view, each having an essentially trapezoidal portion on each half, the lateral boundary surfaces defining two sides and a shorter base of said essentially trapezoidal portions with the shorter bases being oriented opposite one another at an acute angle.
Dependencies are inferred from the claim text.