Abstract: A seating device for aged, infirm and handicapped persons includes a passive, pivotably mounted, energy storage device laterally disposed below a seat base, and a parallelogram linkage between the seat base and a chair seat for controlling elevation and tilting motion of the seat. A lever which can be coupled at selectable points along an arc about the pivot point of the energy storage device exerts torque on the parallelogram linkage to oppose downward movement and aid upward movement. By varying the position of engagement of the energy storage device to the lever, the force exerted can be adjusted to the weight of the user.

Abstract: A system for continuous passive motion of a limb or one or more fingers comprises a reciprocable carriage coupled to a drive belt which is driven by a motor through a disengageable clutch. A second drive belt also driven by the motor, and the first drive belt, carry elements whose positions can be sensed to control limits of motion. Individual finger actuators, adjustable in length and with internal springs, couple engagement means on the fingers to the carriage, which can be driven so as to provide predetermined dwell times at limits of flexion and extension.