A system and method of synchronizing flashing of a plurality of marker systems includes receiving a signal from at least one global positioning satellite by each marker system, the signal comprising a time value. When initiating illumination of at least one light emitting device of the marker systems, synchronizing of the illumination to the time value.

A face seal for a full-face mask includes a sealing element for sealingly contacting at least a part of a face of a user, and a cradle. The sealing element have a peripheral portion and a forehead portion extending along at least a part of the peripheral portion. The cradle is provided on the peripheral portion and have a channel with an opening extending along the forehead portion. The opening is sized and shaped for receiving a head suspension harness of a hat abutting downwardly therein.

There is disclosed a full-face mask to be worn in combination with a protective helmet having a suspension harness. The mask comprises a receiving channel interfacing with the suspension harness to secure the connection between them while preventing the safety helmet to physically interfere with or hinder wearing the mask. Thus, the combination of protective headgears may be worn with improved comfort and decreased risks of breaking the seal provided by the full-face mask.

An inner buffering structure of a helmet comprising an air bladder, wherein the air bladder comprises a detachable inner-layer air bladder and an outer-layer air bladder, and the inner-layer air bladder is used for being in contact with a user's head; a plurality of ventilation openings is formed in the inner-layer air bladder and the outer-layer air bladder; the portions where the inner-layer air bladder and the outer-layer air bladder correspond to the ventilation openings are provided with inner convex edges extending towards the interior of the ventilation openings; a first air valve is arranged on the inner-layer air bladder, a second air valve is arranged on the outer-layer air bladder, and a reserved hole allowing the first air valve to pass through is formed in the outer-layer air bladder.

Disclosed is an elastic exercise strap with a gripping portion that merges into a loop or aperture. The strap can be connected to a sports helmet by threading the extended gripping portion around a part the helmet and then inserted through the loop or aperture. By pulling on the attached strap the neck muscles can be exercised.

An improved air supply device that is removably securable within a welding hood or similar helmet structure. The air supply device provides two thin sheets of smooth, directed air within the hood. One sheet is directed toward a lens to provide a barrier to humidity. The other sheet of air is provided back toward a user's face to provide a barrier to external fumes and to cool the user. The air supply device is designed to smooth turbulent air flow through multiple structures so supply laminar sheets of air flow within the welding hood to recreate a natural environment for the user.

The present system provides a lightweight fire-resistant photoluminescent identifier system for firefighters, which is suitable for use on the firefighter's facemask, as well as other equipment. The system is lightweight and provides individual recognition of an individual firefighter. The identifier system lights up automatically in a low-light environment without batteries, yet prevents glare to the firefighter using the system. The components that comprise the system are fire-resistant to temperatures up to and exceeding 500 degrees Fahrenheit to facilitate personal recognition of the individual in dark and low-light areas.

A headgear apparatus is disclosed comprising a molded headgear apparatus which includes a cushioned core component to provide impact resistance during an activity. The headgear is configured to be low-profile to reduce the loss of vision caused by thick headgear which extends away from the face. The headgear may be molded to the facial contour of the user to provide complete protection from cuts, scrapes, swelling, and impact encountered in impact sports, such as martial arts, football, or other sports wherein impact to the head region is possible.

A helmet including a lighting system integrated into said helmet, the lighting system comprising a first layer; light emitting means mounted to said first layer; controller means mounted to said first layer for controlling said light emitting means; wiring means for linking said light emitting means to said controller means; a second layer fixably attached to said first layer thereby providing an area between said first and second layer for said light emitting means, controller means, and wiring means; power means fixably attached to said second layer for powering said controller and light emitting means; and operating means functionally linked to said controller means for operating said controller means. The application also discloses lighting system contained in a shell that that can be attached to an existing helmet. This application also discloses a lighting system contained in a flexible material that can be fitted onto an existing helmet.

A smart vehicle flock navigation system includes a plurality of smart vehicles configured to follow a leader smart vehicle, wherein the leader smart vehicle is configured to follow a target vehicle or a target driving plan; each smart vehicle being equipped with: obstacle detection and avoidance capabilities; vehicle-to-vehicle communication means for transmitting information about obstacles and evasive actions to following smart vehicles; a flock control module for adjusting the driving path of the smart vehicle flock based on transmitted obstacle information; a flocking behavior algorithm based on three independent rules: Separation, Alignment, and Cohesion, controlling the motion of each smart vehicle within the flock; and a distributed flocking operation mechanism utilizing wireless network communication for coordinating the behavior of the smart vehicle flock.