Firehose Coupling Direction Indicator
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Solution Overview
Problem
Firefighters face challenges in determining the direction of the firehose source versus the nozzle in smoke-filled buildings, with existing solutions being costly, prone to removal, and not intuitive enough for emergency situations, especially when wearing thick gloves or in low visibility.
Innovation Solution
An annular direction indicating device with integral arrowhead-shaped fingers and relief grooves is attached to the male firehose coupling, providing tactile and visual cues to indicate the direction of the firehose source, made from durable materials like polycarbonate or rubber with luminescent properties for enhanced visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flexible removable band is retrofitted along the firehose to indicate direction, then the device can be easily installed and removed, but it may be dislodged or removed through abuse during emergency use
Solution Approach 1:
The directional indicator device is nested within the firehose coupling structure itself, utilizing the male coupling's threaded interior and lug features. The device fits inside the coupling bore and engages with the lugs, making it an integrated part of the coupling assembly rather than a separate attachment.
Solution Approach 2:
The directional indicator is merged with the firehose coupling by incorporating it into the male coupling assembly. The device shares the coupling's structural features (threads, lugs, bore) and becomes a unified component that cannot be easily separated during emergency use.
2Ease of operation
If stiff bristles are interwoven into the firehose surface to provide tactile direction indication, then the device provides intuitive directional feedback, but it increases device complexity and manufacturing cost
Solution Approach 1:
The male coupling's existing lugs serve a dual purpose: they provide structural support for the coupling and simultaneously serve as the directional indication feature. The lugs protrude in a specific direction that naturally guides the firefighter toward the water source without requiring additional components.
Solution Approach 2:
The coupling lugs perform multiple functions: they provide mechanical support for the coupling assembly, enable attachment of the directional indicator device, and serve as the primary directional indication feature itself through their asymmetric positioning.
3Reliability
If new coupling sets are manufactured with integral directional indicators, then the directional indication is permanent and reliable, but it requires large capital expenditures to equip existing firehoses
Solution Approach 1:
The directional indicator device is designed as a low-cost, simple component that can be easily manufactured and installed on existing couplings. It uses basic materials and simple geometry (circular cross-section, rectangular protrusions) to provide reliable directional indication without requiring expensive manufacturing processes.
Solution Approach 2:
The invention introduces an intermediary device that bridges the gap between existing firehose couplings and the need for directional indication. Rather than replacing entire coupling sets, this intermediate component attaches to existing couplings and provides the required directional feedback.
4Ease of operation
If the directional indicator device is made with protruding fingers to provide tactile feedback, then firefighters can easily determine direction by feel, but the device may become entangled with objects and snag during movement
Solution Approach 1:
Instead of having the directional indicator protrude outward from the coupling exterior, the device is positioned inside the coupling bore with its indication features facing inward. The rectangular protrusions extend toward the center of the coupling rather than outward, reversing the traditional approach and eliminating exposure to external entanglement hazards.
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 reliable, inexpensive, and intuitive way for firefighters to identify the firehose source direction, preventing accidental removal and entanglement, while maintaining structural integrity and visibility in dark, smoke-filled environments.
Implementation Method 1
made from durable materials like polycarbonate or rubber with luminescent properties for enhanced visibility
Data Source
AI summary
A direction indicator device captured between couplers of ends of firehose sections that point to the source of the firehose and to safety. The direction indicator device includes a gasket-like annular body which fits over the male threads of the male coupler and is captured between annular ends of the abutting male and female coupler bodies. Direction pointing fingers, integral with the annular body, point toward the hose section to which the male coupler is attached and are angularly oriented to fit between longitudinal lugs of the male coupler. A lip is provided on an inwardly facing surface at each finger tip to hinder removal and to prevent inadvertent removal of the device from the male coupler body.