Abstract: The ultra light chair is designed for greater stability, higher performance, higher efficiency and overall better appearance than conventional chairs. A seat frame is provided separate from the main frame with seat mountings permitting longitudinal, tilt and height adjustments of the seat on the main frame. Unique wheel mountings permit simple manual removal and attachment of the wheels to the main frame, using only one hand. The same wheel mountings permit adjustment of the camber angle of each wheel relative to a vertical plane so that propelling and maneuvering of the wheelchair can be made easier than in the absence of any camber. The seat back for the chair is designed to fold down over the seat frame so that this feature in combination with easy removal of the wheels provides for compact storage during travel.

Abstract: The free-wheeling latch disengages the wheels of power type wheelchairs from the motors to permit easy manual use of the wheelchair. The latch itself is in the form of a manually movable pin projecting into a bore in the side of the hub. When the pin is moved inwardly, it engages a flange structure secured to the wheel axle and thereby locks the wheel to the axle for operation by the wheelchair motor. When the pin is manually retracted, the wheel and hub are free to rotate independently of the drive system to the axle.