It might sound like a futuristic invention, but Sanyo presented its washing-machine for humans way back in 1970. Officially named Ultrasonic Bath, this human washing machine was introduced as a concept at the 1970 World Expo in Osaka. It was about 2 meters tall and the bather had to use a ladder to get in. After the desired water temperature was set, the 15-minutes-washing process would begin. First a 5-minutes pre-rinse cycle, spraying the baither with jets of hot water.
After that the pod-shaped washing-machine filled up with water and a 3-minute massage-bath began. The soothing massage was supposed to stimulate blood circulation while cleaning your body. A 2-minutes rinse process followerd, and finally a 5-minutes drying program, in which warm air blasted the user, while infrared and ultraviolet light killed any remaining bacteria.
Unfortunately the Sanyo Ultrasonic Bath never made it into our homes, but the Japanese company did release HIRB (Human In Roll-lo Bathing), a compact washing machine for humans, used in elderly homes.