1. P14006 Bath Tub Lift Phase V Review Amos Baptiste Jeremy Czeczulin Andrew Hughes Richard Prilenski

2. Introductions NameMajor/Role Amos BaptisteIndustrial & Systems Engineer/Team Leader Jeremy CzeczulinMechanical Engineer Andrew HughesMechanical Engineer Richard PrilenskiMechanical Engineer

3. Agenda Phase IV Overview Problem Definition Action Items Refined Drawings Prototype Materials Actuator and System Stress Analysis Customer/Engineering Requirement Risk Assessment MSD II Plan Questions

4. Problem Statement Bathtub lift – a device that provides assistance to an individual with physical disabilities, including limited balance, coordination, or mobility Can reduce the difficulties of raising and/or lowering an individual into the tub by utilizing a powered seat and a simple control module As population grows the number of aged individuals will greatly increase making demand for assist devices increase Project motivation – Theresa Loce Improve the current design Current device does not meet her needs Powered lift that is sturdy, comfortable, easy to use/clean, makes minimal noise, and takes into account physical limitations of user Ultimate goal – user maintains autonomy and privacy

5. Deliverables Effectively assist the user for bathing purposes Device is easy to access from starting position Minimized operating time Provide a comfortable and supportive seating area Accessible to 10 th -70 th percentile for both genders, regardless of age Reasonably lightweight and portable, able to be transported

6. Current and Desired State Current Unstable Out of production Damaged Difficult access Obstructions prevent full use Desired Easy use Easy access Portable Lightweight

7. Stakeholder(s) Primary Customer: Theresa Loce Contact: 585-647-2329 Secondary Customer (s): Wheel chair users/handicap public & Elizabeth DeBartalo, Hospitals (RGH), Nursing Homes, suppliers/vendors, individuals recovering from knee surgeries, Linak, & Acrylix. Contact: eademe@rit.edueademe@rit.edu Faculty Guide: Art North Contact: ajnddm@rit.eduajnddm@rit.edu Sponsor (financial support): RIT & Theresa Loce

8. Issues to Address from Phase IV Include actuator on CAD design Free body diagram of the Actuator Putting locking mechanism for rotation and lateral movement Make controller longer and wider Limitations of actuator Reorganize risk assessment to importance & severity ratings

9. Action Items from Phase IV Action ItemOwnerIssue(s) to Address Include actuator in the CAD design and perform FBD Andrew & Jeremy Stresses on the actuator Length of the rod needed to ensure seat about bath tub Refine a design and prototype for controller Amos & Jeremy Controller being too small having ability to slip out of hand. Refine CAD designAndrew Ensure the chair fits the target percentile Determine location of bearing and pins Locking mechanism Conduct stress analysisRichard Stress from bending with materials chosen Stresses on pins and bearings Refine BOMAmos Ensure material is waterproof and is strong for safety reasons. Contact Linak Sales ManagerJeremy Specific model code of actuator to order Limitation of actuator

10. Function Diagram

11. Refined CAD Model Click Here

12. Continued

17. Prototype

18. Controller Consist of: Power button Directional pads to move the chair Home button

19. HB60 Handset

20. IPX Ratings

21. LA31 Careline Linear Actuator Provided by Linak 6,000N (1350lb) max push, 4,000N (900lb) pull IPX6 protection class Emergency lowering/retraction 24V DC magnet motor, 2.25m cable Custom stroke length

22. BAJ1 Battery Pack Compact design 40 lifts per charge 4hr charge time Low battery indicator Up to 6000N thrust IPX5 Protection

23. CHJ2 Wall Charger Charges in 4 hrs Indicator light for charging status Compact IPX5 rating

24. MBJ & MBJ2 Mounts Mounting brackets for controller and charger (2) MBJ MBJ2

25. CBJ2 Control box Combines actuator, controls, battery, and charger into one system Central hub IPX5 rating 7 different parts overall

26. Materials

27. Actuator $ 500.00 Total $ 1,357.00 Total with 30% increase $ 1,764.10 Amount Left with 30% increase $ 1,264.10

28. Material Layout

29. Stress Analysis

30. Stress Analysis – Zoomed in Recorded stress values are 6.7 – 15.2 ksi. The limit for acrylic is 10 ksi. Therefore the scissor supports will be thickened.

31. Displacement (in)

32. Factor of Safety Recorded values ranged from 1.9 – 5 where appropriate

33. Updated Customer Requirements

34. Updated Engineering Requirements

35. Updated Engineering Matrix

36. Risk Assessment

39. Plan for MSD II

40. Questions?