Respiratory Hood Rigid Component Bonding via Die-Cut Apertures
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Solution Overview
Problem
Existing respiratory protective hoods face challenges in securely and reliably attaching rigid components without adding bulk, weight, or increasing costs, as traditional methods like threaded couplings and flanges are prone to leaks and offer inadequate protection.
Innovation Solution
A flexible respiratory protective hood with die-cut apertures and corresponding fluid ports allows for direct bonding of rigid respiratory components using thermal fusion or thermally activated adhesives, creating a fluid-tight and mechanical seal without the need for additional fittings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If threaded couplings are used to attach rigid components to the flexible hood, then the attachment can be assembled and disassembled, but the reliability of the seal deteriorates due to potential damage, loosening, and leak paths
Solution Approach 1:
The patent replaces the mechanical threaded coupling system with a bonding system that uses adhesive or ultrasonic welding to attach the rigid respiratory component to the flexible hood. This substitution eliminates threads entirely, replacing them with a bonded interface that provides both permanent attachment and fluid-tight sealing without the risks of thread damage or loosening.
Solution Approach 2:
The patent changes the attachment method from mechanical (threaded) to chemical/thermal (bonding). The bonding process creates a permanent, fluid-tight seal by chemically or thermally fusing the rigid component to the flexible hood material, fundamentally changing the attachment mechanism to one that cannot loosen or become damaged like threads.
2Reliability
If flanges are used to bond rigid components to the flexible hood, then the attachment provides a secure bond, but the device complexity and weight increase due to additional bulk
Solution Approach 1:
The patent extracts and eliminates the flange structure from the design. Instead of adding a flange to the rigid respiratory component for bonding purposes, the patent bonds the component directly to the flexible hood at its existing perimeter, removing the unnecessary structural addition while maintaining secure attachment.
Solution Approach 2:
The patent merges the bonding interface directly with the perimeter of the rigid respiratory component, eliminating the need for separate flange structures. The bonding occurs at the interface between the rigid component edge and the flexible hood, combining the attachment function with the existing component geometry rather than adding separate structural elements.
3Reliability
If flanges are increased in size to provide better mounting, then the attachment security improves, but the respiratory component size must be reduced
Solution Approach 1:
The patent removes the flange structure that was causing the trade-off between mounting security and component size. By bonding directly at the perimeter of the respiratory component without adding flanges, the full size of the respiratory component can be maintained while achieving secure attachment through the bonding process itself.
4Reliability
If traditional bonding methods are used to attach rigid components to the flexible hood, then the attachment provides fluid-tight sealing, but the manufacturing cost and complexity increase
Solution Approach 1:
The patent replaces complex traditional bonding methods with simpler alternatives such as ultrasonic welding or direct adhesive bonding. These methods eliminate the need for complex flange structures and multiple bonding steps, reducing manufacturing complexity and cost while maintaining fluid-tight sealing through the direct bonding of the rigid component to the flexible hood.
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
This solution provides a secure, lightweight, and cost-effective attachment method that maintains the compactness and portability of the hood while ensuring a reliable fluid pathway and reduced breathing resistance.
Implementation Method 1
A bond is established between the hood and respiration component thereby forming a fluid impermeable seal between the respiration component and the hood
Implementation Method 2
The bond may include, but is not limited, to direct thermal fusion, thermally activated adhesive and solvent fusion
Implementation Method 3
The fluid ports are raised whereby they extend from the respiration component. The fluid ports are received by corresponding apertures and project through the hood whereby a portion of the hood abuts the respiration component between raised fluid ports
Data Source
AI summary
The present invention is a flexible respiratory protective hood having interior and exterior surfaces. Multiple apertures are die-cut in the hood in a predetermined geometric configuration. A substantially rigid respiration component to provides a fluid pathway between hood interior and exterior. Raised fluid ports extend from the respiration component and are aligned with the apertures. Fluid ports extend from the hood interior surface and project from the hood exterior surface. A bond between the hood interior surface and the respiration component form a fluid impermeable seal between the respiration component and hood.