Emergency Vehicle Ladder Storage with Movable Outer Housing
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Solution Overview
Problem
Existing ladder storage systems for emergency vehicles lack adaptability for various ladder sizes and vehicle configurations, and do not efficiently facilitate quick deployment of ladders from a storage position to a lower access position.
Innovation Solution
A ladder storage apparatus with an inner housing fixed to the vehicle, an outer housing that moves between storage and deployed positions, an arm assembly, an extensible drive mechanism, and a latching mechanism that allows for manual or powered operation to securely store and quickly deploy ladders, enabling adjustment and secure retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a fixed ladder storage system is used on emergency vehicles, then the ladder is securely stored during vehicle operation, but the ladder cannot be quickly deployed to a lower access position for emergency personnel
Solution Approach 1:
The patent implements a movable outer housing that can transition between a stored position (aligned with the vehicle body) and a deployed position (lowered to provide access). This dynamic structure allows the ladder storage system to adapt between secure transport and quick access modes, resolving the contradiction between stable storage and rapid deployment.
Solution Approach 2:
The storage system is divided into two main segments: an inner housing that remains fixed to the vehicle body, and an outer housing that can move independently between stored and deployed positions. This segmentation allows the outer housing to be quickly positioned for ladder access while the inner housing maintains structural stability during vehicle operation.
2Adaptability or versatility
If a simple storage mechanism is used, then the device complexity is reduced, but the system cannot accommodate various different sizes of ladders and vehicle configurations
Solution Approach 1:
The patent designs the outer housing and arm assembly as a universal interface that can accommodate ladders of various sizes and different vehicle configurations. The extensible drive mechanism provides adjustable positioning capabilities, allowing the same basic structure to serve multiple functions across different emergency vehicle types and ladder specifications.
Solution Approach 2:
The extensible drive mechanism incorporates adjustable positioning capabilities that allow the system to adapt to different ladder lengths and vehicle configurations. This dynamic adjustment feature enables a single storage apparatus design to serve multiple applications without requiring complex customizations for each specific use case.
3Productivity
If manual operation is used for deploying the ladder, then the device complexity is reduced, but the deployment time increases and reduces productivity
Solution Approach 1:
The patent employs a manually-operated extensible drive mechanism that uses mechanical advantage principles (potentially incorporating hydraulic or pneumatic assistance) to enable rapid deployment of the outer housing and ladder. This mechanism reduces the physical effort required while maintaining relatively simple overall system complexity, thereby improving deployment efficiency.
Solution Approach 2:
The system replaces complex automated control systems with a simplified manually-operated extensible drive mechanism that uses mechanical principles to achieve rapid deployment. This substitution maintains ease of operation while significantly improving deployment speed compared to purely manual systems, balancing productivity gains with acceptable complexity levels.
Data Source
AI summary
A mechanism for facilitating the storage of ladders in the upper area on the outside of an emergency vehicle which includes the capability of moving of the ladder to a lower deployed position to facilitate immediate access thereto by emergency workers such as firemen and the like. The construction includes an inner housing attached to the vehicle and an outer housing movable by an arm assembly relative thereto to urge the ladder between the storage and deployed positions. An adjustment mechanism including a yoke is included for varying the position of the powering drive cylinder which operatively moves the outer housing relative to the inner housing.