Back to results
US 6,471,440 B1Granted
Paving stone
OwnerRolf Scheiwillerinventor
Life of this patent
Estimating the term…
Abstract
A paving stone (1) has a linkage securing against displacement. This is achieved by overengaging interlocking elements (6) and underengaging interlocking elements (5) being respectively provided on each side (3, 4) of the paving stone (1).
Claims21
A paving stone comprising:
- an upper surface;
- side walls perpendicular to the upper surface,
- at least a first side wall of the side walls having at least one underengaging lug projecting therefrom, wherein the at least one underengaging lug has a face surface parallel to the first side wall and edge surfaces joining the face surface, the underengaging lug having a trapezoidal-shaped cross section taken perpendicular to the face surface with first and second of the edge surfaces being parallel to each other and third and fourth of the edge surfaces inclined toward each other relative to the direction of the upper surface, and
- at least a second side wall of the side walls having at least one overengaging lug, wherein the at least one overengaging lug has a face surface parallel to the second side wall and edge surfaces joining the face surface, with two of the edge surfaces being inclined away from each other relative to the direction of the upper surface,
- wherein the underengaging lug and the overengaging lug form a vertical interlocking system when the underengaging lug engages with an overengaging lug of a first adjacent paving stone and the overengaging lug engages with an underengaging lug of a second adjacent paving stone.
2 more elements
A paving stone comprising:
- an upper surface;
- side walls perpendicular to the upper surface;
- at least a first side wall of the side walls having at least one underengaging lug projecting therefrom, wherein the at least one underengaging lug has a face surface parallel to the first side wall and edge surfaces joining the face surface, the underengaging lug having a trapezoidal-shaped cross section taken perpendicular to the face surface with first and second of the edge surfaces being parallel to each other and third and fourth of the edge surfaces inclined toward each other relative to the direction of the upper surface, and
- at least a second side wall of the side walls having at least one overengaging setback, wherein the at least one overengaging setback has a face surface parallel to the second side wall and edge surfaces joining the face surface, with two of the edge surfaces being inclined toward each other relative to the direction of the upper surface;
- wherein the underengaging lug and the overengaging setback form a vertical interlocking system when the underengaging lug engages with an overengaging setback of a first adjacent paving stone and the overengaging setback engages with an underengaging lug of a second adjacent paving stone.
2 more elements
Dependencies are inferred from the claim text.