Abstract: A bed foundation may be retrofitted or otherwise converted in the field to include one or more additional function. In one illustrative embodiment, the bed foundation may be retrofitted or otherwise converted by incorporating a drop-in articulation unit. Such an articulation unit may permit a user to raise and/or lower the head of their bed. In some cases, a second articulation unit may be placed at the foot of a bed foundation to permit the user to independently raise and/or lower the head and the foot of their bed. In other illustrative embodiments, drop-in units may add other functions to existing bed foundations. In some cases, the bed foundation and/or drop-in units may be configured such that it can be easily shipped and assembled in the field by a user.

Abstract: A sleep surface is formed by joining longitudinal sides of two juxtaposed air bladders, thereby providing a continuous sleep surface having two independently inflatable air chambers. The union of the two bladders ensures that the bladders remain in a desired position despite being repeated inflated, deflated, folded and unfolded. A support member can be inserted and secured between the two independently inflatable air bladders to provide an enhanced continuous sleep surface.

Abstract: A bed foundation capable of being assembled by the end user or a retailer. The bed foundation utilizes support members having I-beam construction, thereby reducing noise and greatly increasing the strength of the foundation. The foundation is also constructed to provide a flush, uniform top surface onto which top panels are attached. The flush uniform top surface also contributes to noise reduction and increased strength. The foundation, when unassembled, can be packed into a single, relatively small container, thereby significantly reducing shipping costs.