Balanced Filtered-Air Head Covering with Transparent Face Shield
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Solution Overview
Problem
Existing head covering devices (HCDs) such as helmets and PAPRs are often heavy, bulky, and uncomfortable, causing strain on the user's neck muscles due to an off-center center of gravity and inadequate balance, and may not provide sufficient protection or filtered air.
Innovation Solution
A head covering device with a frame, air movers, and filters that encircles the head, providing filtered air through dual intake and exhaust apertures, with a transparent face shield and fabric components for comfort and visibility, and a power control system for adjustable air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional helmets or PAPRs are used for head protection and air filtration, then protection and air filtering are provided, but the device becomes heavy and bulky causing neck strain
Solution Approach 1:
The device is divided into a lightweight frame structure that encircles the head rather than a single bulky unit. The frame supports distributed filtration elements and air movers, segmenting the protective function across multiple lightweight components rather than concentrating mass in one location.
Solution Approach 2:
The device uses a fabric component that forms a flexible seal around the head and neck, replacing rigid bulky housings. The transparent face shield provides protection while maintaining visibility and being significantly lighter than traditional opaque helmet structures.
2Reliability
If traditional PAPRs are designed with high center of gravity, then air filtration is achieved, but user comfort deteriorates due to neck muscle strain
Solution Approach 1:
The device is designed to distribute weight evenly around the head circumference, creating a balanced center of gravity that eliminates neck strain. The frame encircles the head with components distributed front-to-back and side-to-side, making the device essentially balanced in all directions like an equipotential configuration.
Solution Approach 2:
Instead of concentrating mass in a single location (traditional PAPR design), the device distributes components across the three-dimensional space around the head. The frame and fabric component create a distributed mass configuration that balances forces in multiple dimensions, eliminating the high center of gravity problem.
3Ease of operation
If all-in-one PAPR designs are used, then ease of handling is improved, but device complexity increases due to integration requirements
Solution Approach 1:
The frame serves multiple functions simultaneously: it provides the structural support for the device, acts as the mounting structure for filters and air movers, forms part of the sealing system with the fabric component, and distributes weight for comfort. This multi-functionality reduces the number of separate components needed.
Solution Approach 2:
The device combines the frame, fabric component, filters, and air movers into an integrated all-in-one system that is easy to don and doff. The frame and fabric work together as a unified sealing system, and all air filtration components are integrated into a single wearable unit rather than separate pieces of equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device offers a comfortable and effective filtered air environment, reducing strain and maintaining user visibility while minimizing noise and vibrations, with a balanced center of gravity for enhanced user comfort.
Implementation Method 1
an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet
Implementation Method 2
the air mover can be reversed so there is a negative flow of air in the device
Implementation Method 3
an intake air filter covering the intake aperture
Data Source
AI summary
A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion above the user's head and a lower portion proximate to and spaced apart from the user's chin, an intake aperture formed in the frame, and an intake air filter covering the intake aperture. The device includes an air mover chamber attached with an air-tight seal to an inside surface of the frame and communicating on one end with the intake air filter and communicating on another end with a filtered air supply inlet inside the device and an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet. The device also includes an exhaust aperture formed in the frame and an exhaust air filter covering the exhaust aperture. The device further includes a transparent face shield attached with an air-tight seal to a front surface of the frame, the shield providing a space for air between an inside surface of the face shield and the user's face, and a fabric component comprising a first portion that is air permeable configured to cover the frame and filters and a second portion that is air impermeable extending from a back surface of the frame to cover a remaining portion of the user's head and encircle the user's neck.