An artificial ice skating rink floor with a layer of cushion material thereon and a plurality of floor plates formed of ultra-high molecular weight polyethyene laid directly on the layer of cushion material with the floor plates held in position by plate-like and U-shaped insertion members....http://www.google.sh/patents/US4169688?utm_source=gb-gplus-sharePatent US4169688 - Artificial skating-rink floor
