Hood Elastic Hem Sealing Element for Respirator Interface
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Solution Overview
Problem
The transition between the hood and respirator in NBC protective suits is often inadequately sealed, allowing poisonous materials to pass through and pose a risk to the wearer.
Innovation Solution
A hood with a circumferential elastic hem featuring a circumferential sealing element on the side facing the respirator, which creates a leakproof friction-grip connection by abutting the respirator, ensuring a sealed interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a circumferential elastic hem is used to form a face opening for receiving a respirator, then the hood can accommodate the respirator, but the transition between the hood and respirator is inadequately sealed allowing poisonous materials to pass through
Solution Approach 1:
The patent applies local quality by adding sealing elements specifically at the critical interface between the hood hem and respirator. The sealing elements are concentrated at the transition zone where sealing is most needed, rather than uniformly distributing sealing features throughout the entire hood. This localized enhancement of sealing quality at the face opening periphery resolves the contradiction by maintaining respirator adaptability while improving sealing reliability at the vulnerable transition point.
Solution Approach 2:
The sealing elements act as intermediary components between the hood hem and the respirator. These intermediate sealing features (such as sealing lips, flaps, or elastic sealing elements) create an additional sealing interface that bridges the gap between the hood and respirator, preventing poisonous materials from passing through the transition zone while maintaining the accommodative function of the face opening.
2Device complexity
If the hem abuts the respirator directly, then the structure remains simple, but the seal is inadequate and poisonous materials can pass underneath the respirator rim
Solution Approach 1:
Rather than complicating the entire hood structure, the patent applies local quality by adding sealing elements only at the critical abutment zone where the hem contacts the respirator. This localized enhancement adds minimal complexity while effectively preventing poisonous materials from passing through the seal, thus resolving the contradiction between structural simplicity and protection against harmful factors.
Solution Approach 2:
The patent employs flexible sealing elements (such as elastic sealing lips or thin film sealing layers) that can conform to the respirator surface. These flexible sealing components create an effective barrier against poisonous materials while maintaining a relatively simple overall structure, as they can be integrated into the existing hem design without requiring complex rigid structures.
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 sealing element significantly improves the sealing between the hood and respirator, preventing the ingress of hazardous materials and enhancing wearer safety.
Implementation Method 1
A hood, in particular for a clothing item, preferably for protective and/or military purposes, such as an NBC protective suit or the like, includes a circumferential elastic hem constructed and arranged to form a facing opening... the multiplicity of circumferential sealing elements which are durably conjoined with the hem and are in the form of elastofibers for closeout abutment of the respirator
Data Source
AI summary
The invention relates to a hood (1), particularly for a clothing item (2), preferably for protective and/or military purposes, such as an NBC protective garment (suit) or the like, wherein the hood (1) comprises a circumferential (i.e. peripheral) elastic hem (3) for forming a face opening (4), said face opening (4) being provided for receiving a respirator (5), and the hem (3) abutting the respirator (5) in the use state. To achieve or improve the sealing of the transition area between hem (3) and respirator (5), the side of the hem (3) that faces into the face opening (4) is provided with at least one circumferential sealing element (6) for closeout abutment of the respirator (5).