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SAFETY SEAT, PARTICULARLY FOR AUTOMOTIVE VEHICLES

  • US 3,802,737 A
  • Filed: 07/07/1972
  • Issued: 04/09/1974
  • Est. Priority Date: 07/07/1972
  • Status: Expired due to Term
First Claim
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1. In a vehicle safety seat of the known type having (a) stationary means affixed to the vehicle floor, (b) a seat portion, (c) a length adjusting means including a detent structure to immobilize said seat portion with respect to said stationary means in any preselected position, (d) a seat carrier frame connecting said length adjusting means with said seat portion, (e) a backrest portion secured to said seat portion and including a backrest frame and a backrest cushion, (f) a headrest secured to said backrest portion, said headrest including a headrest cushion, (g) a height and inclination adjusting means associated with said headrest and including detent means to immobilize said headrest in any selected angular and height position, the improvement including the combination of A. deformable detent elements forming part of said detent structure associated with said length adjusting means, said detent elements deforming in the direction of length adjustment of said seat upon an accident-caused impact, B. a trapezoidal torsion bar assembly constituting said seat carrier frame and deforming upon an accident-caused impact, C. a rigid backup means for supporting said backrest cushion, D. deformable connecting elements attaching said backup means to said backrest frame, said deformable connecting elements deforming upon an accident-caused impact, E. a torsion member forming part of said inclination adjusting means for said headrest, said torsion member deforming upon an accident-caused impact, F. a carrier structure forming part of said headrest and including deformable support members and G. a buckling cover forming part of said headrest and being mounted on said last-named carrier structure, said combination constituting an energy-dissipating system displaceable to a limited extent under the inertia effect of an occupant'"'"''"'"'s body upon accident-caused impacts, said system resulting in a predetermined, impact-caused displacement of the occupant'"'"''"'"'s head and body by means of an overlapping, but timely staggered shift of said seat portion, engagement of the occupant'"'"''"'"'s head by said headrest, limited shift of the occupant'"'"''"'"'s back, tilting of the occupant'"'"''"'"'s body, limited nutation of the occupant'"'"''"'"'s head and limited displacement of the entire seat achieving a limited acceleration course for the duration of the impact.

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