Patent ID: 8561217

Claim:
A motion restrictor device for use with a protective helmet to reduce the risk of head or spine injury caused by injurious movement of the helmet, said motion restrictor device comprising: a harness wearable by a user of the helmet; at least one strut having first and second ends, the first end of the at least one strut adapted to be associated with a protective helmet and the second end of the at least one strut adapted to be associated with a harness assembly worn by the user; said at least one strut permitting relative motion between the first and second ends of the at least one strut; and an arresting assembly associated with the at least one strut, said arresting assembly being shiftable into and out of a first locked configuration in response to the injurious movement to stop substantially all relative motion between the first and second ends of the at least one strut, and thereby generally prevent helmet movement relative to the harness.