Guttered paving blocks

Claim 1

A paving block for covering a surface by interlocking with other paving blocks each identical to said paving block, said block being a solid body comprising: a. a pair of identical head portions each of which has a pair of parallel opposite sides the length of which is equal to the distance between said parallel sides, each said head portion closed at each end of said parallel sides by straight edges coming together to a point at right angles to each other; and b. a waist portion of square shape joining said head portions, one parallel side of each head portion forming one side of said waist portion, the two head portions being on opposite sides of said waist portion whereby the only way said paving block can interlock fully with any other identical paving block is where a parallel side of a head portion is nestled against one side of a waist portion of an adjacent paving block and the straight edges adjacent said parallel side rest against straight edges of the adjacent block, said head and waist portions forming a surface on opposite sides of said body being narrower across said waist portion than the lengths of said head portions measured from the points at opposite ends where said straight edges come together, all edges along one surface are chamfered including chamfers along said head and waist portions adjacent each other and gutters formed between the head and waist chamfers, said gutters extending below the bottom edges of the chamfers.