Tritium-Housed Zipper Pulls with Protective Cavities

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Solution Overview

Problem

The use of tritium vials in products is closely regulated due to safety concerns, and existing products do not adequately protect these vials from damage or breakage, preventing their widespread incorporation.

Innovation Solution

Incorporating tritium vials into cord locks, webbing clips, and zipper pulls by housing them within protective cavities or holders within the product design, which are made of materials like injection molded plastic or glass, to provide protection and visibility in low-light conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If tritium vials are incorporated into products, then aesthetic and luminary benefits are achieved, but safety regulations require adequate protection from damage or breakage

Engineering Contradiction:

Improvetritium illuminationVSAvoidprotection from damage

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent embeds the tritium vial within a cavity of the zipper pull housing, creating a nested structure where the vial is protected within the product body. This allows the tritium illumination function to be integrated while providing physical protection from damage or breakage during normal use.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent introduces a protective holder or cavity structure as an intermediary between the tritium vial and the external environment. This intermediary structure shields the vial from mechanical damage while still allowing the illumination to function, thus mediating between safety requirements and functional benefits.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If tritium vials are housed within protective structures, then safety and protection are improved, but device complexity increases

Engineering Contradiction:

Improveprotection from damageVSAvoidproduct structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the protective function with the existing zipper pull housing structure by integrating the vial cavity into the housing itself, rather than adding a separate protective component. This merging approach provides protection while minimizing additional structural complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The zipper pull housing serves multiple functions: it provides the structural framework for the zipper assembly, contains the tritium vial for illumination, and protects the vial from damage. This multi-functionality reduces the need for separate protective components, thereby limiting increases in device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If tritium vials are made visible in low-light conditions, then functionality is improved, but regulatory compliance requires adequate protection

Engineering Contradiction:

Improvevisibility in dark conditionsVSAvoidregulatory safety concerns

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The tritium vial is nested within the zipper pull housing with strategic positioning that allows illumination to be visible from the exterior while maintaining protection. The nested structure enables the vial to fulfill its luminary function without exposing it to harmful mechanical stresses.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent employs transparent or translucent materials in the housing structure that allow light transmission for visibility while providing physical protection. These flexible shell-like structures maintain the protective barrier while enabling the illumination to be seen, thus addressing both functionality and safety requirements.

Inventive Principle:

Principle #30Flexible shells and thin films

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 solution allows for the aesthetic and functional benefits of tritium illumination while ensuring compliance with safety regulations by protecting the vials from damage and breakage, enhancing visibility in dark environments.

Implementation Method 1

Tritium is a radioactive isotope of hydrogen which can be used as a luminary device for watches, compasses, knives, guns, tools, and the like

Methodology Applied

Scientific EffectRadioactive decay: Radioactive Decay

Data Source

PatentUS12426687B2Cord lock, webbing clip, webbing hardware or zipper pull including tritium

Publication Date: 2025.09.30 SHERPA ENTERPRISES LLC

AI summary

A zipper assembly includes a slider for mating with a meshing together opposing teeth of a zipper. A pull extends from a first end secured to the slider to a second pull end to define an upper pull surface and a lower pull surface disposed in spaced and opposing relationship with one another. At least one tritium vial is housed within or coupled to the pull for allowing illumination produced by said at least one tritium vial to highlight the pull and improve visibility of the zipper assembly, particularly in dark or low-light conditions.