A temperature-adjusting hat, having a hat having an inside for accommodating a head and an outside, a thermoelectric couple having a first side and a second side having a temperature differential between the first and second sides, and wherein the first side is positioned near the inside of the hat, a power source connected to the thermoelectric couple, and one or more heat pipes connected to the second side, extending over the outside of the hat, wherein the one or more heat pipes has a constant temperature along a length. The hat may have a heat wicking layer in communication with the one or more heat pipes, configured to distribute a temperature from the heat pipes across the outside of the hat. The heat-wicking layer may be graphene or pyrolitic graphite. The heat-wicking layer may be copper sheeting or aluminum, and the first side is positioned to contact a forehead.

A respirator system having a vortex tube with an arcuate hot leg. A respirator helmet has an inlet hose. A vortex tube with an arcuate hot leg and an inlet port is coupled to the respirator helmet. A compressed air source is coupled to the inlet port to supply air to the vortex tube in the range of 110 liter/minute (l/min) to 425 l/min and in the range of 40 pounds per square inch (psi) and 80 psi. This portable arrangement provides effective temperature control within the respirator system.

A helmet attachment is provided, comprising: a shell having a concave bottom; a base having: a convex top affixed to the concave bottom of the shell; a concave bottom affixable to the convex top of a helmet; and an air flow channel formed in the convex top of the base for guiding air through to an exit in the concave bottom of the base; a power and electronics module secured within a cavity in the shell, comprising: a power source; and a 5 volt power output connector electrically coupled to the power source and configured for charging a small electronic device; and a heater electrically coupled to the power source.

A vortex tube with an arcuate hot leg. A vortex tube include a vortex chamber couple to a first tube, a cold leg, to carry a cold air stream and a second tube, the hot leg, to cause the separation of hot and cold air. The hot leg bends in an arc to allow a longer and more efficient hot leg in reduced linear space.

A method and apparatus for the treatment of injuries or pain associated with the head or central nervous system. The present embodiment utilizes a head covering that is activated to produce an endothermic reaction to draw heat from, or apply cold to, the head and central nervous system. Layers are used to accomplish different applications and colors are used to associate with selected sport teams colors or camouflaged as may be required in a battlefield environment.

A head protection pad for insertion into a helmet with a base body made of padding material and a cover which at least partially surrounds the base body, wherein the cover has an outer layer and at least one inner layer, wherein the outer layer is designed as a cooling layer and has a cooling medium integrated into the outer layer.

A protective member such as a helmet includes an outer layer and an inner layer interconnected by multiple connectors, such as extension springs, under tension along their longitudinal axis. The connectors absorb energy from an impact force by resisting further tension along their longitudinal axis and allow the outer layer and inner layer to move relative to each other. In the helmet application, the head of a user experiences less impact force, reduced change in momentum or position of the head and neck, reduced head and neck loads and reduced amounts of linear and rotational acceleration. The protective member can be used in numerous applications and environments, including for participants in sports, in applications including bumpers, passenger cabins, car seats and beds.

A hard hat, including a hat base having a shell, a reservoir disposed within at least a portion of the hat base to store at least one liquid therein, a distribution system disposed within at least a portion of the hat base, the distribution system including an electric pump connected to the reservoir to extract the at least one liquid from the reservoir, and a flexible conduit disposed at a first end on at least a portion of the reservoir and at a second end on at least a portion of the electric pump to direct the at least one liquid from the reservoir to the electric pump, and a misting unit disposed within at least a portion of the hat base to receive the at least one liquid from the distribution system and create a mist therefrom.

A protective member such as a helmet includes an outer layer and an inner layer interconnected by multiple connectors, such as extension springs, under tension along their longitudinal axis. The connectors absorb energy from an impact force by resisting further tension along their longitudinal axis and allow the outer layer and inner layer to move relative to each other. In the helmet application, the head of a user experiences less impact force, reduced change in momentum or position of the head and neck, reduced head and neck loads and reduced amounts of linear and rotational acceleration. The protective member can be used in numerous applications and environments, including for participants in sports, in applications including bumpers, passenger cabins, car seats and beds.

A safety helmet fan system includes a fan housing carrying a first fan on a first side of the fan housing and a second fan on a second side of the fan housing and configured to be mounted, by a mount connector located between the first side and the second side, on an exterior of a safety helmet shell above a brim of the safety helmet shell, and an elongate cooling air duct connected to the fan housing to direct cooling air flow from the fan housing around the brim and into an interior of the safety helmet shell.