Patent ID: 6134853
Filing Date: 2000-10-24
Classification: E04B,E04C

Abstract:
An interlocking block system for use in a wall construction utilizing a plurality of blocks, at least some of which blocks which comprise:pair of generally rectangular spaced parallel first and second sidewalls having substantially flat upper and lower surfaces and end edges generally perpendicular to said upper and lower surfaces and each having an internal and an external surface;a pair of generally rectangular spaced, parallel endwalls, each transverse to said sidewalls, joined to said sidewalls and each having an internal and an external surface;two spaced inwardly extending ridges along said first sidewall each lying generally parallel to said end edges;said ridges including ridge protrusions extending beyond said first sidewall upper surface;each ridge having a recess extending substantially parallel to said first sidewall internal surface;each said recess bounded by said sidewall internal surface and an extension of said ridge running generally parallel to said sidewall internal surface between said sidewall upper and lower surfaces;each said extension having an end surface adjacent to said ridge protrusion;each extension end surface extending approximately from an intersection between said protrusion and said extension end surface toward said sidewall lower surface at an angle to said sidewall upper surface of from about 45 to 55 degrees; andsaid ridge protrusions located so that when one of said blocks is placed over a second said block with said first sidewalls substantially coplanar and an endwall of the upper block substantially at the center of said lower block, a ridge protrusion on said lower block will interlock in said recess of said upper block.