Frangible interlocking paving stone

A set of interlocking frangible paving stones of uniform shape, each paving stone comprising in combination:

• a top surface,
• a bottom surface spaced from said top surface by a load supporting material,
• a plurality of linear grooves on said top surface, at least one of said grooves oriented to divide said paving stone into rectangular solid square sectors, each of said sectors extending between said top and bottom surface including substantially rectangular peripheral faces and
• means formed in at least one of said grooves to facilitate substantially linear separation of one of said sectors from remaining portions of said paving stone,
• said means to facilitate substantially linear separation is a linear crease at a lowermost portion of said linear grooves,
• whereby a linear separation is encouraged to form along said linear crease of said linear groove and extend from said top surface down to said bottom surface said mass having a peripheral surface, wherein said peripheral surface is defined by a plurality of said faces with adjacent pairs of said faces intersecting to form corners on said mass, each of said faces having a single protruding rib thereon extending between said top and bottom surfaces and being parallel to said corners to define a spacer, the spacers on each respective pair of intersecting faces being disposed on said faces wherein the spacer on one of said faces is spaced from said intersection a distance substantially equal to one-third the width of said faces, and the spacer on the other of said pair of faces is spaced from said intersection a distance substantially equal to two-thirds the width of said faces.

A frangible interlocking paving stone for covering a surface without the need for secondary edge stones of differing shape, comprising in combination:

• at least one central sector and at least two tip sectors integrally formed together as a unitary mass,
• said tip sectors and said central sector having a substantially constant thickness,
• each said sector extending perpendicularly from a substantially square bottom surface to a substantially square top surface, said surfaces spaced by said thickness, wherein said thickness defines substantially rectangular faces between said top and bottom faces,
• each said sector of substantially equal size,
• each said tip sector spaced from other said tip sectors, of a common paving stone, and contacting at least one of said central sectors,
• a groove between each said tip sector and a contacting said central sector, said groove including means to facilitate substantially perpendicular fracture of said paving stone from said top surface to said bottom surface, severing one of said tip sectors from a previously contacting said central sector, and
• said means to facilitate substantially vertical fracture of said paving stone includes a linear crease at a lowermost portion of said groove, mass having a peripheral surface, wherein said peripheral surface is defined by a plurality of said faces with adjacent pairs of said faces intersecting to form corners on said mass, each of said faces having a single protruding rib thereon extending between said top and bottom surfaces and being parallel to said corners to define a spacer, the spacers on each respective pair of intersecting faces being disposed on said faces wherein the spacer on one of said faces is spaced from said intersection a distance substantially equal to one-third the width of said faces, and the spacer on the other of said pair of faces is spaced from said intersection a distance substantially equal to two-thirds the width of said faces.

A frangible paving stone for covering a surface without the need for secondary edge stones of differing shape, comprising in combination:

• at least one central sector and at least two tip sectors integrally formed together as a unitary mass,
• said tip sectors and said central sector of similar size having a substantially constant thickness,
• each said sector extending perpendicularly from a substantially square bottom surface to a substantially square top surface, said surfaces spaced by said thickness, wherein said thickness defines substantially rectangular faces between said top and bottom surfaces
• each said sector including an edge surrounding said top surface,
• said edge including a bevel,
• each said tip sector spaced from other said tip sectors, of a common paving stone, and contacting at least one of said central sectors,
• a V-shaped groove between each said tip sector and a contacting said central sector, said V-shaped groove including means to facilitate substantially perpendicular fracture of said paving stone from said top surface to said bottom surface, severing one of said tip sectors from a previously contacting said central sector,
• said severed tip sector and said central sector each including one wall of the V-shaped groove wherein each wall of the V-shaped groove simulates the appearance of said bevel, said mass having a peripheral surface, wherein said peripheral surface is defined by a plurality of said faces with adjacent pairs of said faces intersecting to form corners on said mass, each of said faces having a single protruding rib thereon extending between said top and bottom surfaces and being parallel to said corners to define a spacer, the spacers on each respective pair of intersecting faces being disposed on said faces wherein the spacer on one of said faces is spaced from said intersection a distance substantially equal to one-third the width of said faces, and the spacer on the other of said pair of faces is spaced from said intersection a distance substantially equal to two-thirds the width of said faces.