Patent ID: 7845594

Claim:
A deformable deck for a helicopter comprising: at least one longitudinal member and at least one cross member, which extend respectively in a first and second direction intersecting at a point, said cross member being interrupted at said point of intersection; and an anchoring device for connecting said longitudinal member and said cross member at said point of intersection; said anchoring device in a plane parallel to said first and second directions at a section, so as to permanently dissipate the energy absorbed by said deformable deck, in the event of impact, by deformation of said section; said longitudinal member and said cross member comprising respective first edges and second edges, said second edges directly supporting a tread surface; said longitudinal member and said cross member contacting each other at a common third edge extending between said first edges and between said second edges; characterized in that said anchoring device comprises: at least one half hourglass-shaped plate extending between and in contact with said first edge and said second edge of a relative one between said longitudinal member and said cross member; said deck being further characterized in that said half hourglass-shaped plate lies in a plane parallel to the direction of said relative one between said longitudinal member and cross member and is bounded by a first rectilinear continuous segment which is superimposed on said third edge and by a second segment, opposite to said first segment; said plate further comprising: two end first portions fixed respectively to said first and second edge of said relative one between said longitudinal member or said cross member; a second portion smaller than said first portions in said direction of said relative one between said longitudinal member, arranged between said first portions and defining said section; and an undercut which is bounded on a first side by said second portion, and is, on a second side opposite to said first side, open, said undercut being open on the opposite side of said second segment with respect to said first segment, and being bounded by said second segment.