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The American National Highway Traffic Safety Administration – FMVSS no. 202:
"…A new "backset" requirement would limit the distance between the back of the occupant's head and the front of the head restraint to 2 inches.".
European and American Regulations: - FMVSS no. 201, ECE25:
"… the distance between the back of the head from representing the position of a 50 th percentile head, in a normally seated position, and the head restraint (defined as backset) be no farther than 50mm (2 inches) in any adjustment position."
Recommendations
The motor insurance repair research centre – THATCHAM:
"….To be effective, a head restraint must be as close to the back of the head as possible (touching is best) and the top of the restraint should be as high as the top of the head."
© MIRA Ltd. 2004
"The Whipguard whiplash protector has successfully complied with the energy dissipation requirements laid down in many international legislative regulations and standards, achieving the 80g which exceeds the requirement even when used in a worst-case scenario, as detailed in Test 01. As it is used in conjunction with an already compliant system then the Whipguard can only be of benefit to any head restraint system it is used on. By significantly reducing the occupant head to vehicle head restraint gap and providing a high energy dissipation face, the device tackles two areas that have been highlighted by research institutes, such as Thatcham, as being a major cause of whiplash injuries."
