An improved hinge system for pivotally coupling a skate lower portion to a skate upper cuff. The multi-hinge design incorporates a four link chain mechanism that greatly increases the number of design options for a hinged boot. The pivot axis defined by the four link chain can be designed to shift through...http://www.google.com/patents/US7182347?utm_source=gb-gplus-sharePatent US7182347 - Multi-hinged skate and methods for construction of the same
