PATIO BLOCKS WITH INTERIOR DRAINAGE

1 . A paving block having an upper side and a lower side and comprising:

(a) an outer frame member extending around a perimeter of the paving block, the paving block having an interior area defined by the perimeter; and,

(b) at least one interior member subdividing the interior area into at least two interior regions,

wherein the dividing member comprises first and second opposed spaced apart walls and an upper connecting wall that connects an upper end of each of the first and second opposed spaced apart walls, a drainage channel provided between the first and second spaced apart walls and the upper connecting wall having a plurality of drainage openings communicating with the drainage channel.

2 . The paving block of claim 1 wherein the first and second opposed spaced apart walls define a volume located between the first and second opposed spaced apart walls and the drainage channel comprises the volume.

3 . The paving block of claim 2 wherein the volume has at least one drainage opening in the bottom thereof.

4 . The paving block of claim 3 wherein the volume has an open bottom.

5 . The paving block of claim 1 wherein a plurality of interior members sub-divide the interior area into four interior regions, the plurality of interior members providing the upper connecting wall, whereby drainage openings are provided between adjacent interior regions.

6 . The paving block of claim 1 wherein at least a portion of the outer frame member comprises a single wall outer frame.

7 . The paving block of claim 6 wherein at least a portion of the outer frame member comprises a double walled outer frame.

8 . The paving block of claim 7 wherein the double walled outer frame is provided with a first engagement member and the single wall outer frame is provided with a mating second engagement member whereby the first engagement member of one paving block is inter-engageable with the mating second engagement member of a second paving block.

9 . The paving block of claim 8 wherein the double walled outer frame comprises two spaced apart walls that are connected at their upper ends and open at the bottom so as to form the first engagement member, the first engagement member thereby having an open bottom and an interior volume positioned between the two spaced apart walls, and the single wall outer frame is shaped to seat within the interior volume and defines the mating second engagement member.

10 . The paving block of claim 8 wherein the first engagement member provided on the double walled outer frame comprises a male engagement member and the mating second engagement member provided on the single wall outer frame comprises a female engagement member.

11 . The paving block of claim 1 wherein a first portion of the outer frame is provided with a first engagement member and a second portion of the outer frame is provided with a mating second engagement member whereby the first engagement member of one paving block is inter-engageable with the mating second engagement member of a second paving block.

12 . The paving block of claim 11 wherein the first portion of the outer frame and the second portion of the outer frame comprises a single walled outer frame.

13 . The paving block of claim 12 wherein the first engagement member comprises a plurality of openings located in an upper surface of the paving block and the mating second engagement member comprises a plurality of downwardly extending flanges receivable in the openings of the second paving block.

14 . The paving block of claim 1 wherein a first portion of the outer frame is provided with a first engagement member comprising at least one upwardly extending flange, the upwardly extending flange comprising a outwardly extending first portion that extends outwardly from the first portion of the outer frame and an outer upwardly extending portion and a second portion of the outer frame is provided with a mating second engagement member comprising at least one recess provided in a lower surface thereof wherein the outwardly extending first portion seats in the recess of a second paving block.

15 .- 20 . (canceled)