Bed frame, mattress and bed with enhanced chair egress capability

Abstract

A bed framedisclosed herein includes a calf sectionwith a foot endand an upper endlongitudinally spaced from the foot end, an upper body sectionwith a head endand a lower endlongitudinally spaced from the head end, and a medial sectionlongitudinally intermediate the calf and upper body sections. The bed frame is capable of assuming a chair state and a chair egress state. The upper body section and medial section define a sacral corner, and the calf section and medial section define a popliteal cornerspaced from the sacral corner by an intercorner distance. The intercorner distance is smaller in the chair egress state than in the chair state. A mattressdisclosed herein includes an upper body segment, a calf segment, and a medial segmentThe lower endof the upper body segment cooperates with the upper endof the calf segment to define an intersegment distance. The mattress has a chair state in which the intersegment distance is a distance Dand an egress state in which the intersegment distance is a distance Dwhich is less than D. A bed disclosed herein includes a frame whose intercorner distance is smaller in the chair egress state than in the chair state, and a mattress having a medial segment which is conformable to accommodate smaller and larger intercorner distances.