Patent ID: 6216295
Filing Date: 2001-04-17
Classification: A47C,A61G

Abstract:
An adjustable bed having a head end and a foot end, comprising a lower frame, an upper frame mounted on the lower frame for longitudinal movement with respect thereto; a supporting surface defined by a plurality of support members including at least a back support member adjacent the head end of the bed and connected to the upper frame for pivotal movement about a transverse axis; and back support adjustment means comprising:at least one first arm pivotally connected to the lower frame at a first pivotal connection adjacent the head end thereof;at least one second arm pivotally connected to the upper frame at a second pivotal connection adjacent the said transverse axis;means pivotally connecting the first and second arms to one another at a third pivotal connection intermediate the said first and second pivotal connections;support means, carried by the said third pivotal connection, arranged to support the back support member;and drive means for producing longitudinal movement of the upper frame with respect to the lower frame and, simultaneously, vertical movement of the third pivotal connection and, thereby, upward pivotal movement of the back support member, movement of the upper frame towards the head end occurring when the third pivotal connection moves upwards, and movement of the upper frame towards the foot end occurring when the third pivotal connection moves downwards.