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 surgical helmet assembly (30) to be worn by a user during surgical operations. The surgical helmet assembly includes a frame assembly (40) having a helmet shell (42) to be worn over the user's head. A fan (44) is coupled to the helmet shell to circulate air around the helmet shell. A headband assembly (78) is coupled to the helmet shell to secure the surgical helmet assembly to the head of the user. The surgical helmet assembly further includes an adjustment assembly (100) to adjust a sagittal fit of the helmet shell and the headband assembly to the head of the user while keeping a center of mass of the frame assembly in close proximity to the head of the user. The surgical helmet assembly further includes another adjustment assembly (118) concentric to the first adjustment assembly to adjust a circumferential fit of the headband assembly to the head of the user.

Provided is an adsorption filter structure, and more specifically, an adsorption filter structure with easy detachment and increased filter efficiency. The adsorption filter structure includes a filtration unit passing external air through an internal space in a filtration direction, and filtering the external air, an external vent and an internal vent, and the helmet to which the adsorption filter structure is applied includes a protection unit into which the adsorption filter structure is interpolated and the external air entrance hole is formed, a neck packing part, a nose cast, and an exhalation port. Accordingly, the helmet, including the adsorption filter structure, is designed to be easily detached without protrusion so that a wearer's field of vision is secured, wherein the adsorption filter structure that is not restricted in actions during work is applied. The adsorption layer, the filtration layer, and the shielding layer are stacked therein so as to exhibit optimal efficiency, and thus the filtration efficiency is increased.

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 helmet that includes vents in the shell and removable plugs that may be positioned in the vents to provide an airtight seal while maintaining the aerodynamic shape of the helmet. The vent has an outer vent opening in the outer wall surface of the shell and an inner vent opening in the inner wall surface of the shell. The plug includes a resilient lower surface and an upper surface opposite the resilient lower surface. The resilient lower surface has a lower peripheral lip that compresses when the plug is pushed through the outer vent opening and the inner vent opening and that subsequently expands after the lower peripheral lip passes through the inner vent opening so that the lower peripheral lip engages a portion of the inner wall surface of the shell. The upper surface has an upper peripheral lip configured to conform to a portion of the outer wall surface of the shell when the plug is inserted in the vent.

A helmet can include a helmet body and a shield. The helmet body can include a front portion and a tail portion, and the shield can include two ear portions connected by a brow portion. The shield can be releasably coupled to the helmet body. The ears of a helmet user can be exposed with respect to the helmet body and covered with respect to the shield. The brow portion of the shield can extend across the front portion of the helmet. The tail portion of the helmet can be tapered and the front portion of the helmet can have a rounded leading edge, such that the helmet body has a tear drop form factor.

A system and method include a duct including an internal air passage. One or more ultraviolet (UV) light emitters are coupled to the duct. The UV light emitter(s) are configured to emit UV light into air that passes through the internal air passage. An air inlet is coupled to the duct. The air inlet is in fluid communication with the internal air passage. An air outlet is coupled to the duct. The air outlet is in fluid communication with the internal air passage. A blower is disposed within the duct. The blower is configured to draw the air into the internal air passage through the air inlet, and discharge the air from the internal air passage through the air outlet. The air is disinfected within the internal air passage by the UV light emitted by the one or more UV lights. A sensor is coupled to one or more of the duct, the air inlet, or the air outlet. The sensor is configured to output signals. A control unit is in communication with the UV light emitter(s), the blower, and the sensor. The control unit is configured to receive the signals from the sensor and control one or both of the UV light emitter(s) or the blower based on the signals.

A helmet for protection during an impact, wherein an inner liner may slidably couple to the outer liner through at least one return spring. The outer liner includes an interior surface with a shelf extending inward. The shelf includes an arresting surface. The inner liner has an exterior surface, an interior surface and an edge connecting the exterior surface to the interior surface. The edge faces the arresting surface of the shelf. The inner liner is slidably movable relative to the outer liner between a first position in which the edge of the inner liner is separated from the arresting surface of the shelf by a first gap, and an arrested position in which a portion of the edge of the inner liner is in contact with a portion of the arresting surface of the shelf.

An attachment for a helmet includes an external portion, an internal portion distal from the external portion, and a shaft extending between the external portion and the internal portion. The external portion contains an object to be attached to the helmet. An attachment system including a helmet is also described.

A helmet is provided including a helmet shell for spatially defining a head receiving space and an adjustable ventilation arrangement which is in flow-connection with the head receiving space. The ventilation arrangement includes at least one first ventilation device having at least one first ventilation channel running in the helmet shell and a first slider device, which is assigned to the at least one first ventilation channel and which for varying a flow cross section of the at least one first ventilation channel is displaceable between a ventilation channel opening position and a ventilation channel closing position along the helmet shell. The at least one first ventilation device moreover includes a first latching device for latching the first slider device to secure it in at least one predefined latched position.