US 9,809,977 B2
Digital material assembly by passive means and modular isotropic lattice extruder system
Matthew Eli Carney, Brookline, MA (US); Benjamin Jenett, Cambridge, MA (US); and Neil Gershenfeld, Cambridge, MA (US)
Assigned to Massachusetts Institute of Technology, Cambridge, MA (US)
Appl. No. 15/35,009
Filed by Massachusetts Institute of Technology, Cambridge, MA (US)
PCT Filed May 5, 2016, PCT No. PCT/US2016/031069
§ 371(c)(1), (2) Date May 6, 2016,
PCT Pub. No. WO2016/179441, PCT Pub. Date Nov. 10, 2016.
Claims priority of provisional application 62/158,424, filed on May 7, 2015.
Prior Publication US 2017/0145694 A1, May 25, 2017
Int. Cl. E04B 1/19 (2006.01); E04C 3/02 (2006.01); B64C 1/06 (2006.01); B23P 19/04 (2006.01)
CPC E04C 3/02 (2013.01) [B23P 19/04 (2013.01); B64C 1/068 (2013.01); E04B 1/19 (2013.01); B23P 2700/01 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method of constructing a lattice structure, comprising:
defining a path, established by an assembly head mandrel, that tiles track along as they are placed or removed from the lattice, the mandrel having tracks that enforce a trajectory path;
connecting together along respective nodes, the tiles formed of a single geometric shape such that the connected tiles enclose a volume along the trajectory path, wherein the respective nodes comprise a loop interface feature whereby a node of one tile surrounds at least part of the node of one or more adjacent tiles; and
repeating the connecting step by adding new tiles to unconnected nodes of the previously connected tiles to define a lattice volume, such that the lattice volume grows in a single direction along a centroidal axis shared by stacking the tiles consistent with the trajectory enforced by the mandrel.