Wild! In English, this seems to be a "blind wedged tenon" or a "foxtail joint": http://www.craftsmanspace.com/knowledge/wedged-tenon-and-mortise-joint.html htt

Wild! In English, this seems to be a "blind wedged tenon" or a "foxtail joint": http://www.craftsmanspace.com/knowledge/wedged-tenon-and-mortise-joint.html http://www.craftsmanspace.com/knowledge/wedged-tenon-and-mor... I wonder if this might have useful application for 3D printing, since creating the wedged mortise would can be done easily. Possibly the tenon could even be created with the wedges in place?