Patent ID: 6050044
Filing Date: 2000-04-18
Classification: A63H

Abstract:
A building block having an upper end, a lower end and first and second pairs of opposed side walls extending between said upper and lower ends, one side wall of each of said pairs of opposed side walls having a male dovetail protruding therefrom, said male dovetail extending generally vertically from said upper end of said building block to a position between said upper end and said lower end of said building block; the opposed side wall of each of said pairs of side walls having a female dovetail therein, said female dovetail extending generally vertically from said upper end of said building block to a position between said upper end and said lower end, said male dovetail and said female dovetail being shaped and configured to interlock with a mating female and male dovetail respectively of adjacent such building blocks with a bottom wall of said male dovetail abutting a bottom wall of said female dovetail, to attach said building blocks together horizontally; said one side wall of each of said pairs of opposed side walls having two ribs protruding therefrom, said ribs being spaced laterally from said male dovetail, one on either side thereof, said ribs extending generally vertically from the upper end of said block to a position between the upper end and the lower end thereof; the opposed side wall of each of said pairs of side walls having two grooves therein, said grooves being spaced laterally from said female dovetail, one on either side thereof, said grooves extending generally vertically from said upper end of said block to a position between said upper end and said lower end, said ribs and grooves being positioned, shaped and configured to interfit with mating grooves and ribs respectively of adjacent said building blocks when said building blocks are attached together horizontally, said ribs and grooves being generally rectangular in shape as viewed from said upper end of said building block; and male connecting means on the upper end of said building block and mating female connecting means on the lower end of said building block adapted for attaching said building block vertically to other said building blocks.