Protective Headgear
OwnerChoon Kee Leeinventor
Life of this patent
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Abstract
The present invention provides a protective headgear having a multi-layered shell to sequentially extend time of collision of a blunt trauma to a human head and to differentially release an average impact force of the collision to the human head wearing the protective headgear across a mid layer of the multi-layered shell. The mid layer is configured to separate centripetal mechanical waves of the collision from centrifugal mechanical waves of the collision in phase with the centripetal mechanical waves so as to reduce summation of in-phase bidirectional mechanical waves of bidirectional mechanical forces upon the collision.
Claims13
A protective headgear, comprising:
- a three-layered shell comprising an outer layer having a pressurizable and ventable sac, a mid layer provided as a linearly corrugated plate, and an inner layer having a plurality of air-release pin holes;
- the outer layer, provided as a compressible and deformable layer in a hemispherical bowl configuration, wherein the outer layer comprises the pressurizable and ventable sac fixedly adjoining a lower circumferential ballooned rim, a polymeric filling filling up the pressurizable and ventable sac, and a polygonal grid in a hemispherical polyhedron configuration enclosed by the pressurizable and ventable sac;
- the pressurizable and ventable sac, provided in a hemispherical bowl configuration, wherein the pressurizable and ventable sac comprises a pressurized-gas intake valve and a plurality of pressure-triggerable gas release valves;
- the mid layer, provided as the linearly corrugated plate in a hemispherical bowl configuration, wherein the mid layer is fixedly adhered to an inner surface of the outer layer;
- and
- the inner layer, wherein the inner layer comprises an outer membrane having a plurality of the air-release pin holes disposed therethrough the outer membrane, wherein the outer membrane is configured to tightly enclose a plurality of compressible and deformable blocks of open-cell polymer foam, and wherein the inner layer is configured to be reversibly adhered to an inner surface of the mid layer.
Dependencies are inferred from the claim text.