Systems and methods for providing a headgear cooling liner
Patent No. US7028344 (titled "Systems and methods for providing a headgear cooling liner") on Mar 25, 2004. The application was issued on Apr 18, 2006.
What is this patent about?
’344 is related to the field of protective headgear accessories, specifically focusing on thermal management and wearer comfort for industrial, military, and recreational helmets. It addresses the physiological strain caused by heat exhaustion and scalp irritation when wearing non-breathable protective equipment in high-temperature environments.
The underlying idea behind ’344 is the integration of a dual-purpose structural element that simultaneously provides evaporative cooling and mechanical cushioning. By encapsulating a super-absorbent polymer around a dedicated internal cushioning member within a breathable fabric housing, the invention transforms a simple liner into a dynamic thermal regulator that swells into a protective gel-pad when hydrated.
The claims of ’344 focus on a modular liner assembly featuring liquid-permeable pocket partitions that house both a liquid-absorbing material and a distinct cushioning device. These pockets are strategically spaced apart by a mesh ventilation substrate to create dedicated air channels, ensuring that the cooling effect of the evaporating liquid is enhanced by constant airflow across the wearer's scalp.
In practice, the liner functions as a concave insert that attaches to a helmet's internal harness using hook-and-loop fasteners or straps. The internal polyacrylamide beads act as a reservoir, soaking up water to form a thick gel that conforms to the head. This gel layer serves a secondary role as a shock-absorbing interface, shielding the scalp from the abrasive webbing and hard surfaces of the helmet’s suspension system.
This approach differs from prior art by moving away from solid, cap-like liners that trap heat and moisture against the skin. By utilizing a mesh webbing lattice to separate the cooling pockets, the design ensures that perspiration can evaporate naturally. The inclusion of a specific cushioning device within the polymer pocket ensures the liner maintains its protective geometry even if the liquid-absorbing material is not fully saturated.
How does this patent fit in bigger picture?
Technical Landscape
In the early 2000s when ’344 was filed, thermal management in protective headgear was typically implemented using solid fabric liners or moisture-wicking textiles that covered the entirety of the scalp. At a time when systems commonly relied on passive material properties rather than integrated fluid-retention architectures, these liners often created a trade-off between cushioning and thermal regulation. When hardware constraints made the simultaneous provision of impact protection and evaporative cooling non-trivial, standard headgear configurations frequently resulted in trapped heat and moisture, as the solid construction of existing liners obstructed natural airflow and scalp respiration.
Prosecution Position
The disclosed invention represents a technical advancement through the integration of a hybrid structural architecture that simultaneously addresses thermal regulation and mechanical cushioning. By coupling discrete, non-impervious pocket partitions containing liquid-absorbing polymers to a concave mesh lattice, the system enables a dual-action technical effect: the polymer-filled pockets expand into gel-like cushions to protect the scalp from harness abrasion, while the intervening mesh zones provide dedicated ventilation channels. This architectural shift overcomes the constraint of traditional solid liners by facilitating the natural evaporation of perspiration through the mesh while utilizing the latent heat of the absorbed liquid in the partitions to provide active cooling.
Claims
The patent contains a total of 19 claims, with claims 1, 7, 8, 9, and 17 being independent. These independent claims focus on the structural components and assembly of a headgear cooling liner, specifically featuring liquid-permeable partitions filled with absorbent material, cushioning elements, and integrated ventilation zones designed to create air space within a helmet or hat. The dependent claims serve to further define the specific absorbent polymers used, the materials for the cushioning devices, various orientations of the pocket partitions, the specific types of headgear compatible with the system, and methods for cooling or freezing the liquid-absorbing material prior to use.
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US7028344
- Application Number
- US10809878A
- Filing Date
- Mar 25, 2004
- Publication Date
- Apr 18, 2006
- External Links
- Slate, USPTO , Google Patents