Patent ID: 9015879
Filing Date: 2015-04-28
Classification: A47C

Abstract:
1. A sleeper sofa comprising: a sofa frame, a foldable bed frame, said foldable bed frame attached to said sofa frame, a foldable mattress, said foldable mattress affixed to said bed frame, said foldable mattress comprising a first section, said first section comprising a coil spring and a sinuous spring, a second section, said second section comprising a collapsible sinuous spring and joined to said first section, a third section, said third section comprising a collapsible sinuous spring, said second section pivotally joined to said third section, a noncollapsible mattress transition section, a fourth section, said fourth section comprising a collapsible sinuous spring, said transition section disposed between and directly pivotally attached to said third section and said fourth section, a foot section, said foot section attached to said fourth section whereby said foldable bed frame and said foldable mattress can be folded within said sofa frame with at least said third and fourth sections collapsing in parallel orientation while said transition section remains erect.