US Patent 11344461 Support cushion liners comprising artificial muscles

A support cushion liner includes a liner body having a cavity disposed between an outer layer and an inner layer and a plurality of artificial muscles disposed in the cavity of the liner body. Each of the plurality of artificial muscles include a housing having an electrode region and an expandable fluid region, a dielectric fluid housed within the housing, and an electrode pair positioned in the electrode region of the housing. The electrode pair includes a first electrode fixed to a first surface of the housing and a second electrode fixed to a second surface of the housing. The electrode pair is actuatable between a non-actuated state and an actuated state such that actuation from the non-actuated state to the actuated state directs the dielectric fluid into the expandable fluid region, expanding the expandable fluid region thereby applying pressure to the outer layer of the liner body.