BED HAVING A REDUCED-SHEAR PIVOT AND STEP DECK COMBINATION

摘要

A support assembly for supporting a body, the support assembly comprising a deck (412) including an upper deck portion (414), a lower deck portion (430) coupled to the upper deck portion (414) by a deck side wall (438) so that the lower deck portion is spaced apart from the upper deck portion to define a central, longitudinal recess in the deck, the lower deck portion extending across the deck to provide a lower deck support surface, and a mattress (550) resting on the deck, the mattress including a generally planar upper mattress section (552) having an upwardly-facing body support surface and a bottom surface (580) engaging the upper deck portion, a central projection (582) extending downwardly from the upper mattress section into the recess, the central projection having a bottom surface engaging the lower deck support surface and a side wall being located adjacent the deck side wall.