Patent ID: 7428760

Claim:
A height adjustable bed comprising: (a) a first bed end and a second bed end, each bed end comprising a lifting mechanism, wherein said lifting mechanism comprises: (i) a base to which at least two spaced base posts are mounted to extend upwardly; (ii) a sleeve slidable on each base post; (iii) a cross member extending between and fixed directly to the sleeves; (iv) an actuator located between the base and the cross member and adapted to vertically move the cross member relative to the base; (v) an upper support member for an object to be lifted slidingly movable along the sleeves; and (vi) a pulley provided on the cross member, the pulley supporting a chain or belt fixed at a first end to the base and at the other end to the upper support member so that, in use, as the actuator raises and lowers the cross member, the upper support member is respectively raised or lowered at a greater speed than the cross member; and (b) a mattress support provided between the first and second bed ends and mounted to each upper support member of each lifting mechanism of the first and second bed ends, wherein the mattress support is vertically movable relative to the first and second bed ends.