Patent ID: 7448830

Claim:
A retaining wall block having parallel top and bottom faces, a front face, a rear face, first and second side wall faces and a vertical plane of symmetry extending between the front and rear faces, the block comprising: a body portion including the front face, a head portion including the rear face, a neck portion connecting the body portion and the head portion, the body, head and neck portions each extending between the top and bottom faces and between the first and second side wall faces, an opening extending through the neck portion from the top face to the bottom face, the opening dividing the neck portion into first and second neck wall members extending rearwardly from the body portion to the head portion, first and second pin holes each disposed in the body portion and opening onto the top face for receiving a pin with a free end of the pin protruding beyond the top face, first and second pin receiving cavities each disposed in the body portion and opening onto the bottom face for receiving the free end of a pin received in a pin hole of an adjacent block disposed therebeneath so as to interlock the blocks with a predetermined setback, wherein the neck wall members, are positioned such that a first plane extending parallel to the plane of symmetry and passing generally centrally through the first neck wall member lies midway between the plane of symmetry and a laterally outermost point of the first sidewall face and a second plane extending parallel to the plane of symmetry and passing generally centrally through the second neck wall member lies midway between the plane of symmetry and a laterally outermost point of the second sidewall face.