I am just suggesting to develop a mechanical hoist mounted on a ground frame with wheels to assist patients and mobility disabled persons.
It shall be used with a suspension safety vest
It is also recommended to develop another mechanical mobility aid on wheels to lift and move patients from beds and wheelchairs.
I recommend to make it with 4 points of lifting instead of a single one.
It shall be used with underneath safety cargo web These two rough sketches would explain the proposed two aids