| 摘要 |
FIELD: personal use articles.SUBSTANCE: in the absence of load there is no stud, i.e. there is only a shell folded in the form of concentric rings, taking a parabolic shape when filling it with liquid from the surrounding capsule under pressure that occurs when supporting of the boot on the ground. This hydro-stud is strong enough to sink into the soft football pitch, and at the same time, is soft enough for not to damage the feet of the rivals. There are disadvantages in this means: it is impossible to walk on the pavement in these boots, they would not work on hard pitch without grass, the choice of materials is very difficult (flexible plastics, durable elastic technical fabric).EFFECT: reduction of injuries.1 dwg |
