作者: Raymond O. Keltner
DOI:
关键词: Compressed air 、 Cushioning 、 Engineering 、 Protective gear 、 Air chamber 、 Shield 、 Composite material
摘要: Helmets, shoulder pads, thigh pads and other protective equipment employ a cushioning fluid such as layer of compressed air to protect both the wearer an opposing player in contact sports. The helmet or device has outer inner walls resilient material spaced apart form chamber. A central plastic shield disposed between imparts shape rigidity multiple perforations equalize pressure throughout chamber when flex under impact.