Abstract: A body support applicable to a hospital bed, seat or the like includes a substantially horizontal frame on which a series of carriers are mounted for oscillation about parallel axes transverse of the frame, substantially rectangular-section support blocks of resiliently yieldable material being mounted on the carriers, drive means being provided for oscillating the carriers and the support blocks mounted thereon in unison to tilt the upper faces of the support blocks alternately in both directions from horizontal, varying the pressure applied by all parts of a body supported by the support blocks.

Abstract: A body support such as a bed, operating table or seat has a flexible top sheet secured over the sides and ends of a frame, and resting on a series of parallel resiliently deformable rollers located between the sides of the frame and supported, in turn, by a longitudinally reciprocal substantially horizontal bearer plate, which is driven back and forth causing the rollers to roll back and forth under the top sheet, thus constantly changing the main pressure areas of the body supported by the top sheet.