Patent ID: 8296863

Claim:
A method for mitigating injury, the method comprising: providing a helmet wearable on a head of a user, the helmet comprising: an outer member, a portion of which is shaped to cover at least one of a crown of the user's head and a back of the user's head, the outer member defining a concavity; and an inner member, at least a portion of which is located within the concavity; in response to an impact force, facilitating guided relative movement between the inner member and the outer member using a path-motion guide mechanism coupling the inner member to the outer member; wherein facilitating guided relative movement between the inner member and outer member comprises constraining the guided relative movement to one or more predetermined paths, each of the one or more predetermined paths involving relative translation and relative rotation between the inner and outer members, wherein the axis of relative rotation moves with the relative translation between the inner and outer members.