The invention relates to a protective helmet, comprising an outer shell (1) for distributing impact forces and an antenna (2) for transferring a radio signal, which antenna is arranged at least partially inside the outer shell (1). The outer shell (1) consists of a main material in a main region (5). The protective helmet is characterized in that the outer shell (1) consists of a cut-out material in a cut-out region (6), the cut-out material having a lesser damping effect on the radio signal in comparison with the main material. The invention further relates to a method for producing a protective helmet.

The invention relates to a protective helmet, comprising an outer shell (1) for distributing impact forces and an antenna (2) for transferring a radio signal, which antenna is arranged at least partially inside the outer shell (1). The outer shell (1) consists of a main material in a main region (5). The protective helmet is characterized in that the outer shell (1) consists of a cut-out material in a cut-out region (6), the cut-out material having a lesser damping effect on the radio signal in comparison with the main material. The invention further relates to a method for producing a protective helmet.

A helmet to be worn on a head having an annular headband shaped area. The headband shaped area positioned near an upper junction of the ears and the wearer's head. A top area is centered about a top of the wearer's head. A middle area defined between the headband area and the top area. The helmet includes a shell having an inner surface. A first type of subliner elements extend from the inner surface at a location such that the first type of subliner elements are aligned with the headband area. A second type of subliner elements extend from the inner surface at a location such that the second type of subliner elements are aligned with the middle area. A third type of subliner element extends from the inner surface at a location such that the third type of subliner element is aligned with the top area.

A helmet may have an inner liner forming a body of the helmet, the inner liner having a concave inner surface defining a cavity configured for receiving a wearer's head. A plurality of slippage pads are disposed at selected locations on the concave inner surface and connected to the inner liner, the slippage pads having an elongated shape with a length and a width, the length being greater than the width, the slippage pads each defining a number of integrally connected side-by-side tubes each having an opening adapted to be oriented toward the wearer's head, the openings aligned longitudinally along the length of the slippage pads. A plurality of projecting cushioning pads are disposed adjacent to the slippage pads, and have a greater height than the slippage pads and exhibiting a greater deformability than the slippage pads.

A helmet may have an inner liner forming a body of the helmet, the inner liner having a concave inner surface defining a cavity configured for receiving a wearer's head. A plurality of slippage pads are disposed at selected locations on the concave inner surface and connected to the inner liner, the slippage pads having an elongated shape with a length and a width, the length being greater than the width, the slippage pads each defining a number of integrally connected side-by-side tubes each having an opening adapted to be oriented toward the wearer's head, the openings aligned longitudinally along the length of the slippage pads. A plurality of projecting cushioning pads are disposed adjacent to the slippage pads, and have a greater height than the slippage pads and exhibiting a greater deformability than the slippage pads.

A helmet with an adjustable helmet shell is provided for use in sports including baseball and softball. The helmet shell is expandable and contractable to fit a variety of head shapes and sizes, and hairstyles. The helmet shell may be a single, molded piece or it may include a base member and a flap member. Gaps or slots may be located between flexible side portions and a flexible rear portion of the helmet shell. The slots facilitate outward deflection of the side portions and the rear portion when the helmet is donned. The helmet shell may be biased toward a smaller size such that once the helmet shell is expanded by the force of a wearer's head, it contracts to fit snugly and securely.

A helmet with an adjustable helmet shell is provided for use in sports including baseball and softball. The helmet shell is expandable and contractable to fit a variety of head shapes and sizes, and hairstyles. The helmet shell may be a single, molded piece or it may include a base member and a flap member. Gaps or slots may be located between flexible side portions and a flexible rear portion of the helmet shell. The slots facilitate outward deflection of the side portions and the rear portion when the helmet is donned. The helmet shell may be biased toward a smaller size such that once the helmet shell is expanded by the force of a wearer's head, it contracts to fit snugly and securely.

Personal protective devices with an impact reduction system that includes a first bladder system including a fluid and a second bladder system are disclosed. A passage couples the first bladder system to the second bladder system and includes a first series of Tesla valves that resist flow of the fluid from the first bladder system to a common point of the passageway when an impact occurs to the first bladder system. In some embodiments, the passage further includes a second series of Tesla valves that resist flow of the fluid from the second bladder system to the common point of the passageway when an impact occurs to the second bladder system. The impact reduction system is a passive, closed system.

Personal protective devices with an impact reduction system that includes a first bladder system including a fluid and a second bladder system are disclosed. A passage couples the first bladder system to the second bladder system and includes a first series of Tesla valves that resist flow of the fluid from the first bladder system to a common point of the passageway when an impact occurs to the first bladder system. In some embodiments, the passage further includes a second series of Tesla valves that resist flow of the fluid from the second bladder system to the common point of the passageway when an impact occurs to the second bladder system. The impact reduction system is a passive, closed system.

A method of forming a plate for an article of footwear is disclosed. The method includes applying a first strand portion to a base layer including positioning adjacent segments of the first strand portion to form a first layer on the base layer. The adjacent segments of the first strand portion having a greater density across a width of the plate between a medial side and a lateral side at a forefoot region of the plate than at a midfoot region of the plate and at a heel region of the plate. The method also includes applying at least one of heat and pressure to the first strand portion and to the base layer to conform the first strand portion and the base layer to a predetermined shape.