Skids and kickbars for easy sliding in and out of tables
Tilts forward helping the user get up from the chair
Cross dowel screw connections
High straight back helps improve posture
2 tiered armrests for user to push forward and stand up
Flat pack design
Instruction Manual
The tilt assist chair can ship flat pack in under a 3'x2'x1' cubic space, and can be transported and assembled with just a screw driver. The chair is meant to be purchased and taken home by the consumer and built by a caregiver for the target user in mind.
Problem Statement
Parkinson's disease is prevalent disease in my family so I was interested in designing for users with progressive motor issues. Old age and motor disabilities causes tremors, stiffness and a loss of balance, which makes sitting down and getting up difficult. I wanted to design a chair that would ease the action of transporting out of chairs and that would age with the user.
I began by conducting research into Parkinson's disease, interviewing those with it, developing empathy, and seeing what is available.  Some useful resources were the Parkinson's Foundation and the Yorkshire Care Equipment Guide to Specialist Seating

Parkinson's symptoms
Elderly woman struggles to get up from chair
A chair to serve more value than high seat chairs found in nursing homes, but not as mechanically complex as a reclining chair
I was inspired by other handles, bars, and medical bathroom chairs. It was important for me to design with universal design in mind. Universal Design is a principle to make designs accessible to all people, regardless of age, disability or other factors. Universal design is equitable, flexible, easy, intuitive, and simple for everyone. It was also important for me for the chair to feel warm, homey, and modern, and not cold and sterile like the medical chairs that already exist.
Brainstorming and Sketching
I quickly explored concepts that would aid the user to get up by utilizing springs, wheels, and a tilting motion. I made sure to keep some important features like high armrests to grip onto, skids and kickbars for sliding, a high straight back for posture, and a firm shallow seat to make it easier to get up from.
Brainstorming sketches with ease and accessibility in mind
Chosen concept sketches
User Testing and Mock ups
I settled on a chair that would tilt forward to help the user get up and began building quick mockups to test my concept. User testing gave me important information about ergonomics, dimensions, proportions, angles, and ease of use. 
Need to reduce angle of tilt, and to push back tilt axis point and footrest.
A higher armrest would make getting up more comfortable.
3D Modeling
The design was further iterated and finalized in Rhino3D. Measurements were taken from other chairs and my mock up tests, and a small scale model was 3D printed. The seat and back rest are also modeled to fit curve of the body and to be CNCed. 
Iteration of design in Rhino
Backrest and seat are modeled to fit the body
3D Printed scale model
Sketch Models
Hard maple was chosen for its density and hardness, providing for a heavy and sturdy chair for elderly and the mobility impaired to remain stable in. It is finished with poly-acrylic for durability and danish oil for the seat and backrest for it's warm and homey feeling.
Seat and backrest were CNCed
Paper template for side pieces
Cross dowel connections
Glued up side panels ready to be routered
Test fit parts. Ready for finish!
Thanks for viewing! 

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