Sporting goods including microlattice structures
A sport helmet may include a first surface and a second surface opposite one another, and a lattice formed of flexible polymeric material, configured to deform from an initial shape upon an impact on the sport helmet and recover the initial shape thereafter to absorb at least part of the impact.
1 . A sport helmet comprising:
a first surface and a second surface opposite one another; and
a lattice formed of flexible polymeric material, configured to deform from an initial shape upon an impact on the sport helmet and recover the initial shape thereafter to absorb at least part of the impact;
wherein: the lattice comprises a regular geometrical arrangement of structural members that are formed of the flexible polymeric material, intersect one another at nodes, are integral and polymerized together at the nodes, and have designed dimensions, orientations and positions relative to one another individually controlled during formation of the structural members from the flexible polymeric material; and respective ones of the nodes of the lattice are spaced from one another in three orthogonal directions that include a thickness-wise direction of the sport helmet from the first surface of the sport helmet to the second surface of the sport helmet.
2 . The sport helmet of claim 1 , comprising a liner that comprises the lattice.
3 . The sport helmet of claim 1 , wherein a spacing of the structural members of the lattice is variable.
4 . The sport helmet of claim 1 , wherein respective ones of the structural members of the lattice vary in size.
5 . The sport helmet of claim 1 , wherein respective ones of the structural members of the lattice vary in orientation.
6 . The sport helmet of claim 1 , wherein a resistance to compression of the lattice is variable.
7 . The sport helmet of claim 1 , wherein a stiffness of the lattice is variable.
8 . The sport helmet of claim 1 , wherein a first zone of the lattice is stiffer than a second zone of the lattice.
9 . The sport helmet of claim 8 , wherein: a third zone of the lattice is stiffer than the second zone of the lattice; and the second zone of the lattice is disposed between the first zone of the lattice and the third zone of the lattice.
10 . The sport helmet of claim 1 , wherein a first zone of the lattice is more open than a second zone of the lattice.
11 . The sport helmet of claim 10 , wherein: a third zone of the lattice is less open than the first zone of the lattice; and the first zone of the lattice is disposed between the second zone of the lattice and the third zone of the lattice.
12 . The sport helmet of claim 1 , comprising: a first layer adjacent to the lattice and constituting at least part of the first surface of the sport helmet; and a second layer adjacent to the lattice and constituting at least part of the second surface of the sport helmet.
13 . The sport helmet of claim 12 , wherein the first layer is injection-molded.
14 . The sport helmet of claim 13 , wherein the second layer comprises textile material.
15 . The sport helmet of claim 12 , wherein a material of the first layer and a material of the second layer are different.
16 . The sport helmet of claim 1 , wherein the lattice is curved.
17 . The sport helmet of claim 1 , comprising filling material that fills at least part of hollow space of the lattice.
18 . The sport helmet of claim 17 , wherein the filling material comprises foam.
19 . The sport helmet of claim 17 , wherein the filling material comprises elastomeric material.
20 . The sport helmet of claim 17 , wherein the filling material is configured to dampen vibrations.
21 . The sport helmet of claim 1 , wherein the lattice is optically formed.
22 . The sport helmet of claim 21 , wherein the lattice is optically formed by collimated light beams.
23 . The sport helmet of claim 21 , wherein the lattice is optically formed by ultraviolet light.
24 . The sport helmet of claim 1 , wherein the nodes of the lattice are disposed in at least three levels that are spaced apart from one another in the thickness-wise direction of the sport helmet from the first surface of the sport helmet to the second surface of the sport helmet.
25 . The sport helmet of claim 1 , wherein the nodes of the lattice are disposed in at least four levels that are spaced apart from one another in the thickness-wise direction of the sport helmet from the first surface of the sport helmet to the second surface of the sport helmet.
26 . The sport helmet of claim 1 , wherein the nodes of the lattice are disposed in at least five levels that are spaced apart from one another in the thickness-wise direction of the sport helmet from the first surface of the sport helmet to the second surface of the sport helmet.
27 . The sport helmet of claim 1 , comprising an outer shell and a liner disposed within the outer shell, wherein: the first surface of the sport helmet is an exterior surface of the outer shell; and the second surface of the sport helmet is an interior surface of the liner.
28 . The sport helmet of claim 1 , wherein the structural members of the lattice extend in at least five different directions.
29 . The sport helmet of claim 1 , wherein the structural members of the lattice comprise struts.
30 . The sport helmet of claim 1 , wherein the lattice is configured to be compressed to half of a volume of the lattice and recover the volume of the lattice.
31 . The sport helmet of claim 1 , wherein the density of the lattice in a first region of the lattice located in a first area of the sport helmet differs from the density of the lattice in a second region of the lattice located in a second area of the sport helmet that is subject to greater impact force than the first area of the sport helmet during a sport.
32 . The sport helmet of claim 1 , wherein the regions of the lattice are distributed in a longitudinal direction of the lattice such that the density of the lattice varies in the longitudinal direction of the lattice.
33 . The sport helmet of claim 1 , wherein the flexible polymeric material comprises a polymeric resin and reinforcing fibers within the polymeric resin.
34 . The sport helmet of claim 1 , wherein each structural member has a constant cross-sectional dimension along its length.
35 . The sport helmet of claim 1 , wherein the designed dimensions, orientations and positions relative to one another of first ones of the structural members in a first region of the lattice located in a first area of the sport helmet differ from the designed dimensions, orientations and positions relative to one another of second ones of the structural members in a second region of the lattice located in a second area of the sport helmet that is subject to greater impact force than the first area of the sport helmet during a sport.
36 . A sport helmet comprising:
an outer shell; and
a liner disposed within the outer shell and comprising a lattice;
wherein: the lattice is formed of flexible polymeric material, is configured to deform from an initial shape upon an impact on the sport helmet and recover the initial shape thereafter to absorb at least part of the impact, and occupies at least a majority of a dimension from an exterior surface of the outer shell to an interior surface of the liner; the lattice comprises a regular geometrical arrangement of structural members that are formed of the flexible polymeric material, intersect one another at nodes, are integral and polymerized together at the nodes, and have designed dimensions, orientations and positions relative to one another individually controlled during formation of the structural members from the flexible polymeric material; and respective ones of the nodes of the lattice are spaced apart from one another in three orthogonal directions that include a thickness-wise direction of the sport helmet from the exterior surface of the outer shell to the interior surface of the liner.
37 . A sport helmet comprising:
an outer shell; and
a liner disposed within the outer shell and comprising a lattice;
wherein: the lattice is formed of flexible polymeric material and configured to deform from an initial shape upon an impact on the sport helmet and recover the initial shape thereafter to absorb at least part of the impact; the lattice comprises a regular geometrical arrangement of structural members that are formed of the flexible polymeric material, intersect one another at nodes, are integral and polymerized together at the nodes, and have designed dimensions, orientations and positions relative to one another individually controlled during formation of the structural members from the flexible polymeric material; respective ones of the nodes of the lattice are spaced apart from one another in three orthogonal directions that include a thickness-wise direction of the sport helmet from an exterior surface of the outer shell to an interior surface of the liner.
38 . A sport helmet comprising:
an outer shell; and
a liner disposed within the outer shell and comprising a lattice;
wherein: the lattice is formed of flexible polymeric material and is configured to deform from an initial shape upon an impact on the sport helmet and recover the initial shape thereafter to absorb at least part of the impact; the lattice comprises struts that are formed of the flexible polymeric material, intersect one another at nodes, are integral and polymerized together at the nodes, and have designed dimensions, orientations and positions relative to one another individually controlled during formation of the struts from the flexible polymeric material; respective ones of the nodes of the lattice are spaced apart from one another in three orthogonal directions that include a thickness-wise direction of the sport helmet from an exterior surface of the outer shell to an interior surface of the liner.
39 . A method of manufacturing a liner for a sport helmet, the method comprises forming a lattice of the liner, the lattice comprising a regular geometrical arrangement of structural members that are formed of flexible polymeric material, intersect one another at nodes, and are integral and are polymerized together at the nodes, wherein said forming comprises individually controlling designed dimensions, orientations and positions of structural members relative to one another during formation of the structural members from the flexible polymeric material.