Project: Assistive Jar Opening Device

Human-Centered Product Design

I designed a low-part-count assistive device specifically engineered for elderly users with arthritis, who often face a 10% reduction in grip strength. The project moved from deep anthropometric research into a rigorous iterative design phase where I evaluated four distinct concepts using a PUGH matrix to find the optimal balance of torque transmission and user comfort.

The final product features a dual-action mechanism: as the user squeezes the ergonomic rubber-padded handles, the device simultaneously clamps the jar body and applies counter-torque to the lid. I selected 304 Stainless Steel for its corrosion resistance and stiffness, alongside high-friction butyl rubber grippers to ensure a secure, slip-free hold. Beyond the mechanical assembly, I conducted a full Eco Audit and manufacturing assessment, optimizing the design for forging and CNC machining to ensure it was both sustainable and commercially viable.