Patent ID: 7597504

Claim:
A block and peg combination for a modular wall construction comprising: a cast block of cementatious material having a front face, a rear face, two sides with each side extending between an edge of the front face and an edge of the rear face; a bottom, and a top parallel to the bottom, the front face, rear face and two sides being substantially normal to the bottom and top; the front face having a width between the two sides which exceeds the width of the rear face between the two sides whereby the block tapers at the sides from a wide dimension at the front face to a narrower dimension at the rear face; one of the top and the bottom defining at least two spaced-apart holes adjacent the respective sides of the block; at least two pegs, each peg having a head portion and a shaft portion; the head portion of each peg defining a conical top truncated at its joinder to the shaft portion with the width of each truncated conical top exceeding the width of the shaft portion; each shaft portion being configured for forced engagement in the at least two spaced-apart holes in said one of the top and the bottom of the block so that upon insertion of the shaft portion of one of the pegs in one of the holes, the conical top protrudes from the corresponding hole and the truncated conical surface abuts said one of the top and the bottom surface of the block, the conical top protruding away from said one of the top and the bottom defining a V-shaped elevation profile; the other one of the top and the bottom defining at least one V-shaped groove having a cross-section configured to snugly receive the V-shaped elevation profile of the head portion of one of the pegs; the pegs being secured to said one of the top and the bottom of the block at the holes with the shaft portions within the hole and the conical tops protruding from said one of the and the bottom, whereby the conical top at said one of the top and the bottom of a block can register in the V-shaped groove on the other one of the top and the bottom of a like underlying block to snugly key the bottom of an underlying or overlying block to the top of an overlying block at the V-shaped groove.