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Adjustable lumbar support

  • US 6,254,186 B1
  • Filed: 03/01/1999
  • Issued: 07/03/2001
  • Est. Priority Date: 09/05/1996
  • Status: Expired due to Term
First Claim
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1. A lumbar support for use with the backrest of a seat, said support including, an elongate band having a first end and a second end and a front load bearing surface located between said ends, each said end being connectable to a respective one of two sides of said backrest between which the band extends when in use, drive means connected to said band and being operable to vary longitudinal tension in the band, said load bearing surface having a rearward curvature between said ends at least when said longitudinal tension is relatively low, and a plurality of pleats located between said first and second ends, each said pleat forming part of said band and being responsive to variation in said longitudinal tension so as to fold or unfold and thereby vary said rearward curvature.

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