| 主权项 |
1. A head and neck restraint system comprising:
a vertical support; and a head and neck restraint assembly coupled to said vertical support, said head and neck restraint assembly comprising:
a pair of spaced members coupled to said vertical support, said pair of spaced members having a spring memory that permits movement of one of said pair of spaced members toward and away from the other of said pair of spaced members or movement of both of said pair of spaced members toward and away from each other; andmeans for avoiding the spring memory from returning one or both of said pair of spaced members to a starting position prior to movement after movement of one of said pair of spaced members toward the other of pair of spaced member or movement of both of said pair of spaced members towards each other, wherein the means for avoiding includes:a base supporting said pair of spaced members in spaced relation;a back plate supported by the vertical support and supporting the base in spaced relation to the back plate; andmeans for moving into a space between the back plate and the base in response to movement of one of said pair of spaced members towards the other of said pair of spaced members or movement of both of said pair of spaced members toward each other thereby avoiding the spring memory thereof from returning one or both of said pair of spaced member(s) to the starting position prior to movement, wherein the means for moving includes a wedge that is biased toward the space between the back plate and the base and which is operative, in response to an increase in the space between the back plate and the base, for moving into said increased space thereby avoiding the spring memory from returning at least one of said pair of spaced members to a starting position prior to movement of said at least one of said pair of spaced members. |
