AHC / Adjustable Height Cushion

The adjustment height cushion that is my design provide that people on wheelchair can rise 10 cm from seat surface by themselves when they need.this cushion is integrable on wheelchairs’ seats thanks to strip holder made of composites(fabric and metal).It has hydraulic system,in plastic durable bottom, this system is made of aluminum like in car seats,so its seat height can be adjust to height wished with handle that is interchangeable according to user’s which hand is used by user made of plastics.On the plastic bottom,there is a vinyl,latex or foam cushion. My changes in my design,it works with mechanic system.