An apparatus and a method for refining a geographical location based on dynamic characteristics of a helmet are disclosed. A piece of angular velocity information is sensed through a gyroscope and then compared with a piece of basic angular velocity information to generate a piece of dynamic information of the helmet body. The piece of dynamic information, the piece of location information, and the piece of magnetic flux information are marked on an electronic map to generate a piece of refined geographical location information which is then sent to an output unit to be outputted. Thus, a higher resolution of the current geographical location is obtained.

Hat, helmet, and other headgear apparatus includes dry electrophysiological electrodes and, optionally, other physiological and/or environmental sensors to measure signals such as ECG from the head of a subject. Methods of use of such apparatus to provide fitness, health, or other measured or derived, estimated, or predicted metrics are also disclosed.

Aspects of the present invention are directed to helmet padding systems. One helmet padding system includes a rigid shell and a spacing pad. The rigid shell is configured to cover a top of a user's head and be worn under a baseball cap. The rigid shell includes an opening formed in an area of the rigid shell opposite the front of the user's head when the rigid shell is worn on the user's head. The spacing pad is positioned within the rigid shell. The spacing pad includes a layer of elastomeric material. The helmet padding system may further include the baseball cap positioned overtop the rigid shell. The baseball cap has a cut-out in a rear portion thereof.

There is disclosed universal pumper skirt for use with a helmet. The universal pumper skirt is composed of a coif wrapping around a wearer's neck and connected to a helmet. The coif includes an air connection input port on the coif. A wearer can use an air flow unit to pump air through the input port, creating positive air pressure in the coif and helmet that cool the wearer and reduce the intrusion of dust into the helmet. The coif may be removably attached to a motorcycle or motorsport helmet, therefore, a wearer can remove the universal pumper skirt from a helmet or transfer it to a different helmet.

Systems, methods, and devices for protecting a user head are provided. In one example, a computer-implemented method can comprise receiving, by a system operatively coupled to a processor, a set of data detected by one or more sensor embedded within the helmet device. The computer-implemented method can also comprise adjusting, by the system, a pressure condition within a first set of inflatable cells of the helmet device based on the set of data.

Disclosed is a mouth guard retaining device comprising a mounting member capable of being mounted to a helmet or facemask and a retaining member capable of retaining a mouth guard. Certain embodiments may also comprise a flexible connecting member attached to both the mounting member and the retaining member. Some embodiments will be formed of substantially a single piece of rubber.

A protective headgear (1) comprising: a protective helmet (20) that defines an interior space (31), that comprises an inward major surface, and that comprises a forward window with a windowpane (27); a head suspension that is connected to the helmet; and an air supply module (50) mounted at least partially within the interior space defined by the helmet, wherein the air supply module comprises central, right lateral, and left lateral trunks (53, 54, 55) that are configured so that when the module is mounted within the interior space defined by the helmet, selected central, left and right areas of the inward major surface of the helmet combine with the central, left lateral and right lateral trunks of the air supply module to respectively define a central air supply passage and left and right lateral air supply passages for delivering air to a wearer of the protective headgear, and, wherein the air supply module comprises an external, remote handle (70) that is remotely connected to an air valve that is operative to control a rate at which air is directed into the central air supply passage in comparison to a rate at which air is directed into the left and right lateral air supply passages.

A wearable chassis for a helmet has a shape suitable to be worn on a head of a user and being attachable inside a protective structure having a shape protecting the user's from an external impact. The chassis includes one or more connection ports for connecting an electronic device, a control interface for connecting a control unit, a wiring arrangement for connecting the one or more connection ports to the control interface, and a mounting arrangement for attaching an accessory device to the chassis. Moreover, a helmet including such a chassis and the protective structure having a shape protecting a head of a user from an external impact attached to the chassis, as well as a helmet arrangement including such a chassis and one or more protective structures, each having a shape protecting a head of a user from an external impact, removably attachable to the chassis are provided.

A wearable chassis for a helmet has a shape suitable to be worn on a head of a user and being attachable inside a protective structure having a shape protecting the user's from an external impact. The chassis includes one or more connection ports for connecting an electronic device, a control interface for connecting a control unit, a wiring arrangement for connecting the one or more connection ports to the control interface, and a mounting arrangement for attaching an accessory device to the chassis. Moreover, a helmet including such a chassis and the protective structure having a shape protecting a head of a user from an external impact attached to the chassis, as well as a helmet arrangement including such a chassis and one or more protective structures, each having a shape protecting a head of a user from an external impact, removably attachable to the chassis are provided.

A method for testing a helmet for effectiveness of user protection includes moving a load along a predetermined path, supporting a target body at an impact location in the predetermined path, the target body including a head model and a helmet disposed on the head model, and impacting the target body with a force generated by the moving of the load. The impacting of the target body entails contacting the target body with an impactor free to move perpendicularly and tangentially relative to a surface of the target body. The supporting of the target body is at least reduced, if not eliminated, before or during the impact of the impactor with the target body at the location. Forces generated are automatically measured or sensed during the impact of the impactor with the target body at the location.