Hazardous Environment Fuse With Extended Terminals
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Solution Overview
Problem
Fuses for forklifts in moderately hazardous environments are typically fully enclosed, making them space-consuming, expensive, and difficult to service, while also requiring protection against spark-induced explosions or fires.
Innovation Solution
A fuse design with terminals extending from a protective metal enclosure, featuring insulating end caps and an open-fuse indicator, such as a light-emitting diode, to facilitate easier servicing and safe operation in hazardous environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fuses are fully enclosed in metal casing, then protection against spark-induced explosions is improved, but servicing difficulty increases and space consumption increases
Solution Approach 1:
The fuse assembly is segmented into distinct functional parts: the metal enclosure for explosion protection, the insulating end caps for electrical isolation, and the fuse element for circuit protection. This segmentation allows the protective functions to be maintained while enabling easier servicing through modular replacement of the fuse element without replacing the entire enclosed assembly.
2Reliability
If fuses are fully enclosed in metal casing, then protection against spark-induced explosions is improved, but space consumption increases
Solution Approach 1:
The fuse element is extracted as a separate, replaceable component from the metal enclosure, allowing the protective enclosure to be reused while only replacing the small fuse element when needed. This reduces the overall space requirement compared to replacing entire enclosed fuse assemblies.
3Ease of repair
If terminals are extended from protective enclosure, then servicing ease is improved, but protection against spark-induced explosions may worsen
Solution Approach 1:
Insulating end caps serve as intermediary components between the metal enclosure and the external terminals. These end caps provide electrical isolation and maintain the protective integrity of the enclosure while allowing terminals to extend outward for easy connection and servicing without compromising explosion protection.
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 design enhances servicing ease and safety by allowing terminal access and visual indication of fuse opening, reducing space and cost requirements while maintaining environmental protection.
Implementation Method 1
an opened-fuse indicator positioned to inform a person that the fuse element has opened. The indicator can be a light emitting diode ("LED")
Data Source
AI summary
A fuse for a moderately hazardous environment comprising includes: (i) a fuse element; (ii) first and second terminals connected to the fuse element; and (iii) a metal enclosure placed around the fuse element, the enclosure configured to protect the environment from an opening of the fuse element, and wherein the first and second terminals extend from the metal enclosure.