| 摘要 |
A replacement sports helmet face shield assembly has a cold-weather ventilation system for face shield defogging without circulating cold air through the interior of the sports helmet. The assembly has a face shield frame that carries a face shield. The frame has a lower face shield frame vent and an upper face shield frame vent. The upper portion of the frame may have an air flow director which, when the assembly is mounted on a sports helmet, directs air entering the upper frame vent. The directed air flow creates a vacuum that draws air entering the lower frame vent substantially upward along an interior surface of said face shield. A sports helmet assembly has a versatile, adjustable ventilation system which can operate in a defog-only mode in cold weather, a defog and interior ventilation mode in warmer weather, and an interior ventilation-only mode when no defogging is desired. The assembly includes a sports helmet with at least one helmet air entry vent on a front portion of the helmet and at least one air exit vent on a rear helmet portion. The helmet assembly also includes a face shield frame that carries a face shield and is rotatably mounted onto the sports helmet. The frame has lower and upper frame vents located on the lower frame portion. The helmet entry vent and the frame vents may be selectively opened and closed.
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