Firefighter Helmet Door Chock Clamp for Harsh-Condition Retention
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Solution Overview
Problem
Firefighters face challenges with existing rubber band systems for securing door chocks on helmets, including variability in helmet design, difficulty in accessing and resecuring the chock, potential loss due to improper securing, visibility issues, and degradation of rubber bands under harsh conditions.
Innovation Solution
A device featuring an L-shaped body with a clamp affixed to the helmet, using a screw for secure attachment, and means such as a spring, rubber strap, or o-ring to retain the door chock, ensuring it remains securely in place and resistant to chemicals, heat, and impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard rubber band is used to secure the door chock to the helmet, then the door chock can be retained, but the system becomes unreliable under harsh conditions (chemical exposure, heat, impact) and requires frequent replacement
Solution Approach 1:
The patent changes the material parameters of the retention system by replacing rubber bands with materials specifically selected for their resistance to chemicals, heat (up to 500°F), and impact. The retention device is made from materials that maintain their mechanical properties under harsh fireground conditions, eliminating the degradation issues of rubber bands.
Solution Approach 2:
The patent employs composite material construction for the retention device, combining materials with complementary properties: structural integrity, chemical resistance, heat resistance, and impact resistance. This multi-material approach creates a retention system that withstands all harsh conditions simultaneously, unlike single-material rubber bands.
2Reliability
If a large rubber band is used to secure the door chock, then the chock can be retained, but it becomes difficult to access and resecure when wearing gloves, especially when the rubber band is wet or covered in foam
Solution Approach 1:
The patent segments the retention system into distinct functional components: a retention device with specific geometry (L-shaped body with flanges), a separate fastening mechanism (screw or snap-fit), and a retention element (O-ring or spring). This segmentation allows each component to be optimized for its function and makes the overall system easier to manipulate with gloved hands compared to a single large rubber band.
Solution Approach 2:
The retention device incorporates self-retaining features such as flanges that engage with the helmet surface and a fastening mechanism that maintains constant pressure on the door chock. The system serves itself by maintaining retention without requiring continuous manual adjustment, and the standardized interface allows quick release and reattachment.
3Ease of operation
If a rubber band is used to secure the door chock, then the chock can be retained, but it may become loose and fall off, causing visibility issues and safety problems
Solution Approach 1:
The patent incorporates high-visibility color features into the retention device, making it easily visible to the firefighter and others. The device includes reflective or brightly colored elements that ensure the door chock location is always visible, eliminating the visibility problems that occur when rubber bands become loose or fall off.
Solution Approach 2:
The retention device incorporates preliminary securing features that prevent the door chock from becoming loose in the first place. The flanges, fastening mechanism, and retention elements are designed to maintain constant engagement pressure, counteracting any forces that might cause the chock to become loose before it can fall off.
4Reliability
If a rubber band is used to secure the door chock, then the chock can be retained, but the firefighter may forget where on the helmet the chock is located, causing unnecessary delays
Solution Approach 1:
The retention device incorporates high-visibility color coding and reflective elements that make the door chock location immediately recognizable. The standardized position and visible markings ensure the firefighter can quickly locate the chock without hesitation or delay, regardless of lighting conditions or helmet orientation.
5Ease of operation
If a standard rubber band is used to secure the door chock, then the chock can be retained, but the rubber band slides off the smoother surface of most fire helmets when wet or exposed to foam
Solution Approach 1:
The retention device incorporates preliminary engagement features such as flanges that contact the helmet surface before the fastening mechanism is activated. These flanges are positioned and shaped to ensure proper alignment and prevent sliding, establishing a stable foundation before the door chock is secured.
Solution Approach 2:
The retention device uses composite materials with surface properties specifically engineered to interact with smooth helmet surfaces. The flanges and contact surfaces are made from materials that provide sufficient friction and mechanical interlocking, preventing sliding even when wet or covered in foam.
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 provides a reliable, easy-to-use, and durable method for retaining a door chock on a firefighter's helmet, ensuring it remains accessible and securely attached even in challenging conditions, enhancing safety and reducing delays.
Implementation Method 1
a spring capable of retaining said door chock within said L-shaped body
Implementation Method 2
a clamp capable that can be securely affixed to the brim of an industrial helmet, bore formed into said L-shaped body in which a screw can be inserted through and into said clamp
Data Source
AI summary
A device to secure a door chock to an industrial helmet more particularly a firefighter's helmet.