The invalid walker 93, equipped with knee brace 94, is then moved to the end of the bed, with knee brace 94 placed as a support for the person's knees. (Alternatively, a wheelchair or other device equipped with a knee brace structure can be used.) The lift drive mechanism is then activated to rotate the lift arms 19, which raise the sheet 39 and the person 1, at the end of the bed 2, to a standing