Patent ID: 8037944

Claim:
Fastening device for coupling ploughing elements in an agricultural cultivation machine to a support arm that is part of the agricultural cultivation machine, comprising: an intermediate fastening element which attaches a ploughing element to the support arm, said intermediate fastening element including: a solid body; a fastening arrangement for attaching the intermediate fastening element to the support arm; a guiding arrangement extending in one direction for inserting the intermediate fastening element into the ploughing element; and one through hole transverse to the direction of the guiding arrangement; and a removable pin removably insertable into the one through hole and which, in an insertion position of said pin, acts as a retention element for the ploughing element with respect to intermediate fastening element, said removable pin having an R-shape with a linear portion that extends into the one through hole, a V-shaped portion connected to one end of the linear portion by a connecting portion, and said V-shaped portion is positioned above said solid body and has a downwardly extending apex.