Geometria Kine

ally sound and cleaner design.

Such links can be assembled to form planer and threedimensional structures. In their planar embodiments, retractable structures according to this invention may be comprised exclusively of panels hinged together.

In their three-dimensional embodiments, whether conical, hemispherical or other shapes, panels are connected to one another via small hub elements.

This discovery represents a significant improvement over the earlier invention, and offers the promise of building of practical architectural structures with retractable features (Hoberman 2004).