Mobile elevator for disabled

This project have been developed in my company. This is our first model of an mobile platform for disabled or persons with limited mobility. We've completed the design but we decided to take another approach for weight and simplicity sake. Few challenges for develop: - The Linak LA34 actuators have a limited stroke and power so we've to discover a position which it work for the desired load and don't interfere with other elements - For gain a certain margin of security in operation springs have to be added in the base - In the same time, this spring cannot generate to many load because the traction load of the actuator is inferior to the compression load - The transport modus have to be simple and compact - The wheels have to be enclosed due to the spring