Alternative design 1




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Alternative Design 1 report Adjustable Back Angle Controller ABAC By Alaena DeStefano Steven Frisk Raymond Pennoyer Team No 8 Funded by Rehabilitation Education Research Center Client Contact Information Dr John Enderle University of Connecticut Biomedical Engineering Department Program Director Professor of Biomedical Engineering Bronwell Building Room 217C 260 Glendale Road Storrs Connecticut 06269 2247 Voice 860 486 2500 Email jenderle bme uconn edu Website www eng2 uconn edu jenderle BME Program Homepage www bme uconn edu EMB Magazine Homepage www EMB Magazine bme uconn edu Table of Contents 1 Alternative Design Project No 1 1 1 Introduction 1 2 Subunits Control Lever Lever Hydraulic Control Valves Resistance Springs Hydraulic Pump Motor Hydraulic Tubing and Fixtures Pressure Valves Pressure Gauge and Adapter Hydraulic Lift Polycarbonate Box 2 Realistic Constraints 3 Safety Issues 4 Impact of Engineering Solutions 5 Life Long Learning 6 References Page 2 2 3 13 3 3 4 4 5 5 6 7 8 8 9 9 10 10 11 11 12 13 14 15 16 17 17 19 19 20 20 21 Figures and Tables Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure 1 2 3 4 5 6 7 8 9 10 11 12 13 Basic Design of Handle Operation of a Control Valve Calculation of Input Force on Springs Free Body Diagrams PROCON Series 4 Pump 48YZ Frame Motor Hydraulic Fixtures and Hosing Pressure Valve Regulator Pressure Gauge and Adapter Prince Double Acting Hydraulic Cylinder View of the Intermediate Trunnion Mounting Style Clear Polycarbonate Sheets thick Overall Schematic of Design 4 5 6 6 8 9 10 10 11 12 12 13 13 Table Table 1 2 Bore Size vs Weight Lifted Proposed Budget 11 19 1 1 Alternative Design Project No 1 1 1 Introduction Nursing is among one of the highest risk occupations for the development of back pain and injuries Currently 17 of nurses experience chronic back pain due to working in a hospital setting 36 of these back injuries in nurses can be contributed to patient handling In addition to






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