Abstract: Car platform chassis structure adapted to have an open-bottomed body balloon structure assembled thereon, the platform structure comprising main side sills extending beyond wheel-wells with inwardly displaced end portions at the wheel wells, the main side sills having a plurality of longitudinally spaced cross-members secured therebetween providing dash-firewall, front seat support and back seat support and vertically spaced horizontal plate-like members secured on cross-members therebetween to form a box-like structure in the front wheel-well zone, a floor pan secured beneath the cross-members between wheel-well zones, longitudinally spaced vertical bulkheads secured to the outer sides of the main side sills in the space between wheel-well zones, and outer auxiliary side sills between the wheel-well zones secured to the main side sills over the bulkheads, the hollow spaces of the side sills being filled, if desired, with rigidifying material, as of plastic foam, either pre-formed or injected.

Abstract: Vehicle bumper having high yield strength and extensive movement under impact loads with full shape restoration, comprising a thin transversely curved high strength resilient front plate, a high strength resilient rear backing plate located at a distance behind the front plate and anchored to the vehicle, and an intermediate body of an elastomeric material between the front plate and the rear plate to absorb impacts, increase the yield distance and to assist in restoring the front plate to original shape, together with a soft yieldable front jacket with a scuff-resistant outer surface which covers the bumper and, if desired, adjacent parts of the front of the vehicle.