A mechanical refrigeration and heating unit supplies filtered air that is heated or chilled as needed for one or more welding helmets. A portable or transportable cabinet or housing has an air inlet on which a cartridge air filter is mounted. The air passes through an evaporator coil into an evaporator plenum where an evaporator fan moves the air to an outlet that connects with a heater plenum that contains an electric heater module. An outlet of the heater if fitted with an outlet port to which an air hose may be connected. A compressor, condenser coil, receiver, and condenser fan are located in an equipment compartment in the housing. A control board in the unit allows the user to select heated or chilled air. A clogged-filter alarm provides visual and audio alarm signals when pressure in the evaporator plenum falls below a threshold.

A safety helmet includes an outer shell configured for surrounding a head of a user, and an infrared reflective layer disposed in an interior of the outer shell. The infrared reflective layer is configured for reflecting at a least a portion of incident infrared radiation transmitted through the outer shell. The infrared reflective layer has infrared reflectivity of at least 40%. The safety helmet further may have an evaporative cooling pad positioned within a cavity defined by the inner surface of the outer shell. A method of manufacturing a safety helmet is also disclosed.

A helmet, in particular to a bicycle helmet, having a plurality of ventilation openings and at least one evaporation cooler that is arranged in a ventilation opening.

A helmet adapted to control the temperature within the helmet is disclosed. The helmet contains therein a pipe designed to drive therein a cooled or heated liquid. The pipe is positioned with the helmet such that the pipe is in partial contact with the user's head body part when wearing the helmet.

A shock reducing helmet includes a helmet body made of an outer and inner shell, ear openings, and face shield or visor that connects flush to the helmet body.

The outer shell is formed from the strongest and lightest weight materials, such as polycarbonate, or other plastics, Kevlar, carbon fiber, or metal, to provide a high strength to weight ratio and minimize fracture.

The inner chamber includes shock absorbing structures made from materials such as a nickel-titanium shape-memory alloy, polycarbonate, other plastics, Kevlar, carbon fiber, or metal. Some variants have a viscous or gaseous layer around the springs to increase stability upon linear and rotational impact.

The face shield or visor is made of a clear polycarbonate that connects flush with the outer shell to eliminate visibility interference and rotational injuries caused by competitors pulling the metal bars commonly present in football helmets.

Disclosed is a system for regulating body temperature of a subject. The system includes: one or more sensors for monitoring environmental and/or physiological parameters; a multi-layered garment having a plurality of thermoelectric elements distributed throughout the multi-layered garment; a controller for receiving input from the one or more sensors and connected to the plurality of thermoelectric elements to systemically control the thermoelectric elements based on the environmental and/physiological parameters; and a battery for providing power to the one or more sensors, the thermoelectric elements, the controller or a combination of any of these. The system can improve worker safety and comfort in an energy efficient manner.

Baseball caps to be worn on a person's head are provided. According to one embodiment, a baseball cap includes a strap assembly configured to adjust a tightness of the dome on the wearer's head, the strap assembly including an outer strap attached to a first edge portion of the dome and an inner strap attached to a second edge portion of the dome. The inner strap is configured to be movable within the outer strap, and the first cable is configured to draw the inner strap closer to the first edge portion of the dome and the second cable is configured to draw the outer strap closer to the second edge portion of the dome.

A helmet may include a cooling device coupled thereto, where the cooling device may include a fluid absorbing material that is sufficiently porous to facilitate airflow therethrough positioned within an air intake scoop. The air intake scoop may include a basin formed in part by a front edge of the air intake scoop and by a rear barrier in the air intake scoop. At least one vent aperture located behind the rear barrier. A fluid absorbing material may be disposed within at least a portion of the air intake scoop. At least one drainage aperture may be positioned within a sidewall of the air intake scoop and located at least partially below a top surface of the rear barrier.

A headgear for protecting a user from head injury includes a helmet and a cooling unit. The cooling unit is designed to be attachable to, and detachable from, the helmet by the user during normal use of the headgear. In an embodiment, the cooling unit includes one or more inlets, a fan for drawing in air into the cooling unit via the one or more inlets, a pad to hold moisture to cool the air drawn into the cooling unit to generate cooled air, and an air outlet to direct the cooled air into said helmet.

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.