Patent ID: 7654776

Claim:
A wall block system for constructing a wall comprising: a plurality of wall blocks, each wall block having parallel top and bottom faces, a front face, a rear face, and first and second side wall faces, a pin hole opening onto the top face, a pin receiving cavity opening onto the bottom face, wherein the pin receiving cavity opens onto the bottom face to a depth which is less than a distance between the top and bottom faces; and a plurality of pins, each pin having an upper section and a lower section, the upper section having a cross sectional dimension, the lower section having a cross sectional dimension, the cross sectional dimension of the upper section being greater than the cross sectional dimension of the lower section, the plurality of pins being sized such that the lower section is sized to be received in a pin hole in the top face of a wall block and the upper section is sized to be received in a pin receiving cavity in the bottom face of a wall block, the upper section further being sized to prevent the upper section from being received in a pin hole in the top face of a wall block.