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US 4,452,485 AGranted
Flexible elastic support
OwnerWilhelm Schusterinventor
Life of this patent
Estimating the term…
Abstract
An adjustable-curvature structure, e.g. for seat backs, comprises a pair of support belts which are flexible but substantially inextensible, and a pair of tension belts juxtaposed with the support belts. A grid of transverse bars can span the support belts and a tension device is provided between the two pairs of belts so that the support belts can be bowed when the other belts are placed under tension. The curvature character is controlled by spacers which interconnect the support and tension belts to limit the distance between them at various locations along their lengths.
Claims7
A flexible elastic supporting structure comprising:
- an elongate flexible and longitudinally substantially inextensible and incompressible band forming a support belt;
- an elongate flexible and generally flat element forming a tension belt secured at a first end thereof to a first end of said band, said support and tension belts having mutually confronting broad sides and extending generally codirectionally with each other;
- retaining means engaging second ends of said belts for holding said second ends close to each other while maintaining said tension belt under stress whereby a convex curvature away from said tension belt is imparted to said support belt with a peak at an unrestrained central portion thereof;
- and
- manually displaceable adjustment means coupled with said support belt at a fixed intermediate location disposed between one of said ends thereof and said unrestrained central portion for varying the spacing of said belts from each other at said location, thereby modifying said convex curvature with a shift of said peak in a range lying between said location and said retaining means.
2 more elements
Dependencies are inferred from the claim text.