Patent ID: 8549811

Claim:
An interlocking masonry block for constructing a wall together with other masonry blocks comprising: a front wall and a rear wall connected by at least one web member; at least one aperture extending vertically through said interlocking masonry block for receiving a flowable concrete mixture used in core filling said wall; the front wall including first and second vertical sides adjoining a front face and the rear wall including first and second vertical sides adjoining a rear face, the first vertical sides of the front and rear walls having first engagement members and the second vertical sides of the front and rear walls having second engagement members, said first and second engagement members registerable with a correspondingly shaped engagement member extending down an opposing side of an abutting block or blocks to inhibit movement of said flowable concrete out through a vertical interface between said interlocking masonry block and said abutting block or blocks; wherein each of said first engagement members comprise vertical first, second, and third planar portions, said first and third planar portions at an acute angle to said corresponding front or rear face, said first planar portion adjoined to a vertical edge of the second planar portion and said third planar portion adjoined to an opposite vertical edge of said second planar portion, such that said second planar portion is intermediate said first and third planar portions and is at an obtuse angle to said corresponding front or rear face; wherein each of the second engagement members comprise adjoined vertical first, second, and third planar portions, each of said first, second, and third planar portions being parallel to a corresponding first, second, or third planar portion of said first engagement members; whereby the first and second engagement members are configured to cooperate with said correspondingly shaped engagement member of said abutting block or blocks; and the front and rear walls including respective upper bedding faces, each having a plurality of spaced apart lugs extending upwardly therefrom, or adjacent thereto, for engagement with an underside portion of an overlying block or blocks.