Patent ID: 9739028
Date: 2017-08-22
CPC Classifications: E02D

Claim:
1. An irregular trapezoidal structural unit configured to be arranged with other like units in courses to form a structure, the unit comprising: an upper surface and a lower surface, the lower surface being opposed to the upper surface; a front face and an opposed rear face disposed between the upper surface and the lower surface, the front face being longer than the rear face, the front and rear faces having an irregular configuration; a first side face and an opposed second side face disposed between the upper surface and the lower surface, wherein both the first side face and the second side face generally extend inwardly in plan view from the front face to the rear face; wherein the first side face and the second side face each include a general S-shape section; wherein the S-shape section of the first side face and the S-shape section of the second side face each are center rotational images; and wherein the S-shape section of the first side face is a translated image of the S-shape section of the second side face such that the first side of said unit will mate with either a first or second side face of another like unit and the second side face of said unit will mate with either a first or second side face of another like unit; wherein the front face and the rear face each include a general S-shape section; wherein the S-shape section of the front face and the S-shape section of the rear face each are center rotational images; and wherein the S-shape section of the front face is a translated image of the S-shape section of the rear face.