Patent ID: 8479469

Claim:
A collapsible shuttering block for building walls by assembling the block with other identical or similar blocks, the block comprising: two longitudinal and parallel vertical walls of rigid molded plastic each having an inwardly bent surrounding return; said return including a continuous rigid upper part, a continuous rigid lower part and two continuous rigid ends with vertical edges; one of said upper and lower parts and said vertical edge of one of said ends each having a respective V-shaped section or U-shaped section rebate with an outwardly-facing opening; hinges interconnecting said walls and having hinge elements and vertical pins articulating said hinge elements to one another and to said walls to give the block various configurations; said hinge elements being movable between: a collapsed, storage and transport configuration with said hinge elements folded against one another and the block having a minimum width, a work configuration with the block having a maximum width, and an intermediate configuration with said walls not at a maximum spacing, but configured to rest on blocks beneath and facilitate relative positioning of the block with respect to blocks having already been laid, before bringing the block into said work configuration; said rebates configured to fit over said return of another block having already been laid, upon bringing the block into said work configuration, to provide a connection with the other block, whether the other block is juxtaposed with the block in the same course or in a course below; and plates configured to respectively close off a bottom and at least one end of the block, said plates each including: a solid wall parallel to and having the same dimensions as a face to be shut off; two longitudinal bent returns; and wedging fins projecting into said plate from each of said bent returns and towards an opposite one of said bent returns, said fins configured to fit into said rebates of the block to be closed off.