CONTENTS 1. Introduction 11 1.1 Background 11 1.2 Aim 12 1.3 Objective 13 1.4 Project Goal 13 2. Research 14 2.1 Types of mobility device 14 2.2 Wheelchair Mechanics 16 2.3 User Group 18 2.3.1 Poliomyelitis: 18 2.3.2 Amputation: 18 2.3.3 Spinal injury: 18 2.4 Pressure Sores 19 3. Data collection 21 3.1 Further data collection 21 3.1.1. Free Wheelchair Mission GEN_2: 21 3.1.2. Harmony 21 3.1.3. Leveraged Freedom Chair (developing): 22 3.1.4. Etac Cross Active 22 3.1.5. Panthera X 23 3.2. Indoor and outdoor 23 3.3. Re-structure: 23 3.4. Hypothesis: 23 4. Design 24 4.1 Design Specifications 24 4.1.1 Ergonomics: 24 4.1.2 Features: 24 4.1.3 Manufacturing: 24 4.1.4 Materials: 25 4.1.5 Size: 25 4.1.6 Safety: 25 4.1.7 Aesthetics: 25 4.1.8 Cost: 25 4.2. Concept 25 4.2.1. Frame Brainstorming 25 4.2.2. Concept Development 27 4.2.3. Concept Generation 29 4.3 Final prototype Making 31 4.3.1. Frame making 31 4.3.2. Mechanism 34 4.3.3. Assemble 35 4.3.4. Finishing 37 4.4 Final technical Drawings 38 5. Bibliography 43 6. Appendix 44 Interviews 44 6.1. Deepa Malik: 44 6.2. Mr Vikram 45 6.3 User survey 46 6.4 Casters available in the market 47 6.5 Tyres available in market 47 7. List of Figures 49