HensNest v2

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The HensNestAbout the Design The HensNest was created to address pressing issues with current face mask hacks. Inspired by The NanoHack and DIY Face Mask, it features a flexible printed hoop frame that conforms to the face without post-processing steps. This design addresses breathability issues with hard-sided mask designs and keeps the filter surface away from the mouth and nose. The HensNest is mostly planar and fast and cheap to print. Release Notes for v2.0 The v2.0 HensNest design is production ready and includes complete assembly instructions. Minor tweaks are being made, and release notes will be updated as progress is made. 1. DESIGN MODIFICATIONS: HensNest v2.0 features two important design improvements from v1.0. An interior retaining ring secures the filter in place, and ergonomic improvements fit more comfortably around the nose while holding the filter material further from the face. 2. FILTER MATERIAL: Commonly available filter materials are being experimented with, and one ply of a clean furnace filter is currently recommended. Higher performance filters like 3M Filtrete Ultra Allergen Air Filters have an MPR rating of 1500. 3. SECUREMENT STRAPS: Household rubber bands secure the mask to the face in current assembly instructions. A 4-point and 2-point securement option are presented, with the 4-point being more strongly recommended. Release Notes for v1.0 HensNest v1.0 was released to give the maker community a chance to further “hack” an improved wireframe design. Continuous design improvements and updates will be released related to the wireframe design and assembly instructions. 1. ASSEMBLY: Assembly is similar to the DIY Face Mask by Mark Fuller, involving securing the disposable filter within the wireframe. Rubber bands or elastic straps should be connected at the four tabs on the wireframe. 2. STERILIZATION: The HensNest was designed with a disposable filter and a reusable wireframe in mind. Printing the wireframe in ABS allows for heavy disinfectant use and steam sterilization via hospital sterilizer or home dishwasher. 3. FILTERS: Different filter types are being experimented with to achieve an N95 rating. Vacuum cleaner bags, household heater air filters, and other common filters are being tested. About the Team The HensNest is a collaborative project from the University of Delaware’s (UD) Department of Mechanical Engineering. The design was conceived in The Design Studio, an undergraduate teaching and learning makerspace. Mr. Whitney Sample led the project as Co-Director of The Design Studio and industrial designer by training. Design and CAD support for the project was provided by Design Studio teaching assistant Arnav Prasad, with logistical support from faculty members Prof. Jenni Buckley and Prof. Ajay Prasad. Extensive clinical consultation and inspiration were provided by Dr. Lisa Lattanza, Chair of the Department of Orthopaedic Surgery at Yale University. Liability The HensNest should be used only as a last resort when FDA-regulated masks are not available for home or medical use. The HensNest design files and manufacturing notes are presented “as is” in a good faith effort to help with the COVID-19 pandemic. If you use, copy or share this Item, you agree to utilize these files at your own risk and comply with any state and federal guidelines for use of these devices.