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US 12,089,666 B2Granted
Energy absorbing systems
AssigneeRheon Labs Ltd
InventorDaniel James Plant
Life of this patent
Estimating the term…
Abstract
Disclosed herein are flexible energy absorbing systems and methods of manufacturing flexible energy absorbing systems. The systems include one or more cells of a strain rate sensitive material and having a re-entrant geometry. Some of the systems have an anisotropic geometry to provide a different response to impacts from different directions.
Claims13
A flexible energy absorbing system comprising:
- a plurality of cells formed from a strain rate sensitive material and connected to a base element, wherein:
- each respective cell of a first subset of the plurality of cells comprises a cell wall continuously tapering in a single direction from a first cell wall width at a first end of the cell wall attached to the base element to a second cell wall width at a second end of the cell wall opposite the base element, the cell wall having a continuous concave curvature,
- each respective cell of the first subset of the plurality of cells comprises a hole at a top of the respective cell opposite the base element,
- the plurality of cells comprise a re-entrant geometry along a re-entrant geometry axis,
- each respective cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising a major axis and a minor axis, the major axis and the minor axis being perpendicular to the re-entrant geometry axis, and
- the hole at the top of each cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising the major axis and the minor axis.
3 more elements
A body armor, comprising:
- a flexible energy absorbing system, comprising:
- a plurality of cells formed from a strain rate sensitive material and connected to a base element, wherein:
- each respective cell of a first subset of the plurality of cells comprises a cell wall continuously tapering in a single direction from a first cell wall width at a first end of the cell wall attached to the base element to a second cell wall width at a second end of the cell wall opposite the base element, the cell wall having a continuous concave curvature,
- each respective cell of the first subset of the plurality of cells further comprises a hole at a top of the cell opposite the base element,
- the plurality of cells comprise a re-entrant geometry along a re-entrant geometry axis,
- each respective cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising a major axis and a minor axis, the major axis and the minor axis being perpendicular to the re-entrant geometry axis, and
- the hole at the top of each cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising the major axis and the minor axis.
4 more elements
A helmet, comprising:
- a flexible energy absorbing system, comprising:
- a plurality of cells formed from a strain rate sensitive material and connected to a base element, wherein:
- each respective cell of a first subset of the plurality of cells comprises a cell wall continuously tapering in a single direction from a first cell wall width at a first end of the cell wall attached to the base element to a second cell wall width at a second end of the cell wall opposite the base element, the cell wall having a continuous concave curvature,
- each respective cell of the first subset of the plurality of cells further comprises a hole at a top of the cell opposite the base element,
- the plurality of cells comprise a re-entrant geometry along a re-entrant geometry axis,
- each respective cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising a major axis and a minor axis, the major axis and the minor axis being perpendicular to the re-entrant geometry axis, and
- the hole at the top of each cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising the major axis and the minor axis.
4 more elements
A method of manufacturing a flexible energy absorbing system, comprising:
- forming a plurality of cells from a strain rate sensitive material on a base element, wherein:
- a first subset of the plurality of cells comprises a cell wall continuously tapering in a single direction from a first cell wall width at a first end attached to the base element to a second cell wall width at a second end of the cell wall opposite the base element, the cell wall having a continuous concave curvature,
- each respective cell of the first subset of the plurality of cells comprises a hole at a top of the respective cell opposite the base element,
- the plurality of cells comprise a re-entrant geometry along a re-entrant geometry axis,
- each respective cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising a major axis and a minor axis, the major axis and the minor axis being perpendicular to the re-entrant geometry axis, and
- the hole at the top of each cell of the first subset of the plurality of cells comprises an anisotropic geometry comprising the major axis and the minor axis.
3 more elements
Dependencies are inferred from the claim text.