Abstract
We have developed three new types of wheelchairs, each of which has an original lift mechanism for the object of use. One is an electric wheelchair for a person with muscular dystrophy or quadriplegia. It can vary the height of the seat by its newly developed lift mechanism from the floor level to a level of 50cm by a couple of switch buttons. At the same time, the mechanism can control the seat from a lifting to a reclining position or vice versa by a single toggle switch. The second is also an electric wheelchair for a person with muscular dystrophy or paraplegia with poor muscular strength. It has two masts along which the seat moves smoothly up and down from the floor level to one limited by the mast height. The last one is a hand-operated wheelchair for a person with paraplegia or lower who has had him limbs amputated. It can control the seat level from floor to the mast height by a light lever handle. These are now practically used and appreciated by the handicapped.
