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Seatback frame having retrorse connection of a concave resilient lumbar support member

  • US 5,129,707 A
  • Filed: 06/17/1991
  • Issued: 07/14/1992
  • Est. Priority Date: 06/28/1990
  • Status: Expired due to Fees
First Claim
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1. A seatback frame comprising:

  • an inverted U-shaped frame member including an elongated and generally horizontal upper member and a pair of elongated side members respectively extending generally downwardly from the extremities of the upper member;

    a pair of side panels respectively secured to and extending generally forwardly from each side member and having inwardly facing surfaces that oppose each other, each side member and associated side panel cooperating to form a side support assembly; and

    a lumbar supporting panel having lateral extremities extending toward the side support assemblies and having a central portion extending generally upwardly and being secured to a central portion of the upper member, the lumbar supporting panel being formed of a resilient material and being forwardly spaced from the side members proximate the side panels and being generally concave therebetween, the lateral extremities of the lumbar supporting panel forming retrorse portions that extend generally rearwardly along the opposed surfaces of the side panels, the retrorse portions including rearmost margins that are respectively attached to the side support assemblies, the resilience of the lumbar supporting panel allowing the retrorse portions to flex generally about their attached margins to damp forces acting to accelerate a passenger toward the seatback frame or vice versa.

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