Patent ID: 8898832

Claim:
A foldable mattress support comprising: a first upper frame that extends in a first plane; a first lower frame that extends in a second plane; a second upper frame that extends in a third plane, wherein the foldable mattress support is adapted to support a mattress lying on the first upper frame and the second upper frame when the foldable mattress support is completely unfolded; a second lower frame that extends in a fourth plane; a plate, wherein the first upper frame is pivotally attached to the plate and pivots about a first axis, wherein the second upper frame is pivotally attached to the plate and pivots about a second axis, wherein the first lower frame is pivotally attached to the plate and pivots about a third axis, wherein the second lower frame is pivotally attached to the plate and pivots about a fourth axis, wherein each of the first axis, the second axis, the third axis and the fourth axis is orthogonal to the plate and passes through the plate at a separate fixed location; and a hinge extension attached to the first lower frame, wherein the third axis passes through the hinge extension and does not pass through the second plane, and wherein the hinge extension allows the second plane of the first lower frame to be parallel to the first plane of the first upper frame when the foldable mattress support is completely folded.