Cast concrete paver block

Abstract

Precast concrete paver blocks are provided with interlocking edge joints so that abutting edges of adjacent paver blocks align when the blocks are installed and are maintained in alignment. At each joint, each block includes a tapered projection and a recess. When edges of two blocks are moved to abut each other, the tapered joint projection on each block enters the joint recess on the other block. The taper on the projections move the blocks to align the block surfaces. The edges of the blocks are angled or relieved below the joints to ensure a tight fit at the top of the paver blocks.

1 . A cast concrete paver block having a top surface, a bottom, and at least three side edges, and at least two joints on at least one of said side edges, wherein each of said joints is adapted to engage a complementary joint on an edge of another paver block, and wherein each joint includes a portion projecting form said at least one side edge and a recess in said at least one side edge, and wherein said projection is tapered to facilitate alignment with a complementary joint on an edge of another paver block when said block edges are moved together.  
     
     
         2 . A cast concrete paver block, as set forth in  claim 1 , and wherein said joints on said at least one edge are spaced a predetermined distance below the top surface, and wherein said at least one side edge below said joints is angled towards said bottom at an angle greater than 90°.  
     
     
         3 . A cast concrete paver block, as set forth in  claim 2 , and further including a chamfer between said at least one side edge and said bottom.  
     
     
         4 . A cast concrete paver block, as set forth in  claim 2 , and wherein for each joint, said projection is elongated extending along a line substantially parallel to said top surface, and wherein said recess is at least as long as said projection and extends along said line substantially parallel to said top surface.  
     
     
         5 . A cast concrete paver block, as set forth in  claim 4 , and wherein for each joint, said projection has an upper surface and a lower surface angled towards an apex, and opposing ends angled towards said apex, whereby said upper and lower surfaces are trapezoidal shaped and said opposing ends are triangular.  
     
     
         6 . A cast concrete paver block, as set forth in  claim 1 , and wherein for each joint, said projection is elongated extending along a line substantially parallel to said top surface, and wherein said recess is at least as long as said projection and extends along said line substantially parallel to said top surface.  
     
     
         7 . A cast concrete paver block, as set forth in  claim 6 , and wherein for each joint, said projection has an upper surface and a lower surface angled towards an apex, and opposing ends angled towards said apex, whereby said upper and lower surfaces are trapezoidal shaped and said opposing ends are triangular.  
     
     
         8 . A cast concrete paver block, as set forth in  claim 6 , and wherein said block has a predetermined uniform spacing between each two adjacent joints on said at least one side edge.  
     
     
         9 . A cast concrete paver block, as set forth in  claim 1 , and wherein at least said top surface is textured to simulate natural stone.  
     
     
         10 . A cast concrete paver block, as set forth in  claim 9 , and wherein side edges of said block which do not include joints are textured to simulate natural stone.  
     
     
         11 . A cast concrete paver block having a top surface, a bottom, and six side edges, first and second of said side edges extending parallel to each other, third and fourth of said side edges joining opposite ends of said first side edge and each extending at angles of at least 15° to said first side edge, and fifth and sixth of said side edges connecting between opposite ends of said second side edge and ends of said third and forth side edges.  
     
     
         12 . A cast concrete paver block, as set forth in  claim 11 , and wherein said first and second side edges are of the same length and at least as long as said third and forth side edges.