Adjustable bed

Abstract

An adjustable bed having mattress supporting portions for supporting a mattress for an occupant and in a variety of positions, a base frame for supporting the mattress supporting portions, and position controlling mechanism operatively interconnecting the mattress supporting portions and the base frame. The position controlling mechanism comprises an upper frame operatively connected with the mattress supporting portions for moving the portions relative to one another, lifting arms operatively connecting the upper frame and the base frame, and a plurality of drive motors operatively connected with the upper frame and with the lifting arms for moving the upper frame and the lifting arms and thereby positioning the mattress supporting portions in the desired positions. The operation of the position controlling mechanism is such that the portions of the bed may be moved both vertically and angularly through raised and lowered horizontal positions, Trendelenburg and reverse Trendelenburg positions, headlift and seated positions. Movement to and from headlift positions is accomplished with coordinated translation of the mattress supporting portions so as to move the head of an occupant essentially directly vertically rather than arcuately. A foot drop position approximating vertical is available so as to accommodate seated positioning of an occupant.