Care must be exercised to keep the proper side of the block up or down while assembling a wall. These arcuate pockets plus a special recess are in the top surface of each block but are not the bottom surface (and vice versa), so the top and bottom surfaces are different and not interchangeable.tiers of concrete blocks are progressively set back by a complex arrangement of multiple through-holes, cavities, recesses and pockets in blocks which are interlocked by pins extending from holes in one tier of blocks into arcuate pockets in blocks of the next tier above or below.Mortarless concrete block retaining walls have the advantages that they are inexpensive, easy to construct with unskilled labor, have long life, and will adapt to ground subsidence which could crack a poured concrete or mortared wall.the field of this invention is mortarless retaining walls.E02D29/025- Retaining or protecting walls made up of similar modular elements stacked without mortar.E02D29/02- Retaining or protecting walls.E02D29/00- Independent underground or underwater structures Retaining walls.E02D- FOUNDATIONS EXCAVATIONS EMBANKMENTS UNDERGROUND OR UNDERWATER STRUCTURES.E02- HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING.Priority to US07/767,678 priority patent/US5252017A/en Application granted granted Critical Publication of US5161918A publication Critical patent/US5161918A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Wedgerock Corp filed Critical Wedgerock Corp Priority to US07/648,011 priority Critical patent/US5161918A/en Assigned to WEDGEROCK CORPORATION reassignment WEDGEROCK CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Original Assignee Wedgerock Corp Priority date (The priority date is an assumption and is not a legal conclusion. ![]() Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Hodel Current Assignee (The listed assignees may be inaccurate. ![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US07/648,011 Inventor Gerald W. Google Patents Set-back retaining wall and concrete block and offset pin thereforÄownload PDF Info Publication number US5161918A US5161918A US07/648,011 US64801191A US5161918A US 5161918 A US5161918 A US 5161918A US 64801191 A US64801191 A US 64801191A US 5161918 A US5161918 A US 5161918A Authority US United States Prior art keywords hole means tier retaining wall block blocks Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US5161918A - Set-back retaining wall and concrete block and offset pin therefor US5161918A - Set-back retaining wall and concrete block and offset pin therefor
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