Patent attributes
A building frame module comprises first and second parallelogram-collapsible frame sections. Each frame section comprises: a plurality of elongate, rigid first frame members; and a plurality of elongate, rigid second frame members. Each second frame member is single-axis pivotally coupled at spaced apart locations to at least two of the plurality of first frame members and each first frame member is correspondingly coupled to at least two second frame members. The building frame module also comprises a plurality of elongate, rigid cross-link members. Each cross-link member links a second frame member of the first frame section to a second frame member of the second frame section. Each cross-link member is single-axis pivotally coupled to each second frame member that it links for relative pivotal movement therebetween. Each coupling between a cross-link and a corresponding second frame member permits pivotal movement about an axis parallel to the plane in which the corresponding frame section (which includes the second frame member) is parallelogram-collapsible.
