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Design of a rugged wheel for application in the Leveraged Freedom Chair

This thesis analyses the front wheel of the
Leveraged Freedom Chair (LFC) an all-terrain, off-road wheelchair
with two distinct models: one for the developing world and one
specifically for American riders. The functional requirements of
performance and price, were designated by the start-up company
Global Research Innovation and Technology (GRIT), which makes the
LFC. This study includes comparisons between the original rubber
wheel, which is currently being used as the front wheel of the LFC,
and alternative wheels available for purchase. The goal was to find
a new wheel which could be implemented for future manufacturing to
increase the lifespan of the LFC, improve the ride quality and
efficiency of production. Based on performance it is concluded that
a pneumatic wheel of comparable geometry to the original rubber
wheel is the best alternative for the American chair where
maintenance is more routine and replacement parts and service are
readily available. For the developing world future work is
necessary to either improve the quality of the original rubber
wheel or select a low cost, low maintenance
alternative.