Safety seat

摘要

An energy absorbing device for carrying a passenger seat; the device comprises a base fixed to a vehicle; a member displaceable from base; at least one energy-absorbing arrangement interconnecting base and displaceable member. The energy-absorbing arrangement comprises a plastically deformable absorbing element in response to stresses greater than a predetermined threshold stress. In some embodiments the plastically deformable absorbing element is a helically configured ribbon having spaced-apart ribbon laps. In other embodiments the plastically deformable absorbing element is compressible, and/or extendable. A method of attenuating the acceleration applied to a passenger due to impact is disclosed; the method comprises steps of: providing an energy absorbing device fixedly attaching the base to the vehicle; fixedly attaching the passenger seat to the base; accidently applying the impact to the vehicle; displacing the displaceable member relative to the base; attenuating the effect of the impact on the passenger.

主权项

1. An energy absorbing device adapted for carrying a passenger seat; said device comprising
(a) a base fixedly attached to a pre-existing vehicle seat, wherein the base rests atop a seat bottom of the pre-existing vehicle seat; (b) a member displaceable relative to said base; and (c) at least one energy-absorbing arrangement interconnecting said base and said displaceable member;said energy-absorbing arrangement comprises a plastically deformable absorbing element in response to stresses greater than a predetermined threshold stress;wherein said energy-absorbing arrangement comprises a hingely interconnected four-bar sub-arrangement configured to be reshaped angularly when said device is stressed; said four-bar sub-arrangement comprises first and second bars substantially parallel to said base; said first bar is mechanically secured to said base; said second bar is mechanically secured to said displaceable member; third and fourth bars each being one piece, the third and fourth bars hingely interconnect terminals of said first and second bars; and wherein angular reshaping is controlled by said deformable element secured to said base and connected to said four-bar sub-arrangement.