Adjustable Firehose Handle System Reducing Fatigue
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Solution Overview
Problem
Firefighters experience fatigue and difficulty controlling firehoses due to back pressure, which is exacerbated by the suboptimal grip required to manage the hose and nozzle, leading to increased effort and stress in critical situations.
Innovation Solution
An adjustable firehose handle system with two selectively spaced handles positioned perpendicular to the line of back pressure, allowing for optimal hand positioning and leveraging mechanical advantage to reduce fatigue, which is a non-permanent addition to firefighting equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the firefighter uses the standard grip method with hands parallel to the hose around the circumference, then the grip can be maintained, but the firefighter experiences increased fatigue and difficulty controlling the hose
Solution Approach 1:
The handle system segments the grip function into two separate handles positioned at different locations and orientations. One handle is positioned for one-handed operation near the nozzle, while the second handle extends perpendicular to the hose for two-handed control, dividing the control function between multiple grip points to reduce fatigue on any single hand or muscle group
Solution Approach 2:
The invention adds a perpendicular dimension to the traditional circumferential grip by extending one handle perpendicular to the hose axis. This creates a three-dimensional handle configuration that allows firefighters to grip the hose from multiple spatial dimensions, improving control leverage and distributing muscular effort across different body groups
2Ease of operation
If the firefighter uses one-handed pistol grip nozzle, then the nozzle can be controlled, but the grip is too close to the nozzle tip and only one hand is in a useful position
Solution Approach 1:
The handle system segments the grip function into two separate handles positioned at different locations and orientations. One handle is positioned for one-handed operation near the nozzle, while the second handle extends perpendicular to the hose for two-handed control, dividing the control function between multiple grip points to reduce fatigue on any single hand or muscle group
Solution Approach 2:
The handle system is designed to be universally applicable to standard firehose couplings through the front ring interface. The handles can accommodate various grip styles and positions, serving multiple functions including one-handed operation, two-handed control, and adjustable positioning to suit different firefighter needs and situations
3Force
If the firefighter relies on grip strength for traditional hose handling, then control can be maintained, but muscle fatigue increases across hands, arms, shoulders, chest, back, and core
Solution Approach 1:
The handle system creates a counterbalancing leverage system where the extended perpendicular handle acts as a counterweight lever arm. This mechanical advantage system redistributes the force requirements from pure grip strength to leverage-based control, reducing the metabolic energy consumption of the firefighter's muscle groups while maintaining effective hose control
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 adjustable handle system significantly reduces fatigue by distributing the force across multiple muscle groups, making it easier and less strenuous to handle and maneuver the firehose and nozzle, thereby improving control and reducing the risk of errors during firefighting.
Implementation Method 1
The two-hand perpendicular/transverse grip enables the muscles of the hands, arms, shoulders, chest, back, and core thus making it easy to maneuver and much less fatiguing using many muscle groups... providing a plurality of framing connection holes... two spaced apart handles extending perpendicularly from the framing element
Data Source
AI summary
A firehose handle device that secures to a firehose and nozzle interface. The firehose handle device has two spaced apart handles oriented transverse to the firehose/nozzle coupling when secured thereto. In certain embodiments, the handles may be selectively adjustable relative to each other.