Aerial Firefighting Bucket With Flexible Skin and Hydraulic Valve
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Solution Overview
Problem
Existing aerial firefighting bucket systems face issues with improper deployment in water sources, unreliable power filling systems in shallow water, lack of durability, and challenges with the actuation of valve systems, leading to reduced reliability and increased maintenance burdens.
Innovation Solution
The development of an aerial firefighting bucket system featuring a collapsible bucket with a pliable skin and a hinged framework, allowing for easy filling and discharge, along with a hydraulically activated flapper valve assembly and a power fill system with check valves, to enhance durability, reliability, and ease of maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bucket uses a rigid framework structure, then structural strength is improved, but durability under stress and ease of maintenance deteriorate
Solution Approach 1:
The patent transitions from a rigid framework to a dynamic flexible framework composed of flexible members that can bend and move. This allows the structure to flex under stress from water weight and aerial maneuvers, preventing structural failure while maintaining strength. The flexible members can dynamically adapt to loading conditions rather than resisting them rigidly.
Solution Approach 2:
The patent employs flexible members that function similarly to thin films, allowing the framework to flex and deform under stress. These flexible members can bend without breaking, accommodating the dynamic loads experienced during aerial firefighting operations, thereby improving durability while maintaining structural integrity.
2Stability of the object's composition
If the skin is fixedly attached to the framework, then structural stability is improved, but durability and ability to relieve stress deteriorate
Solution Approach 1:
The skin attachment system transitions from fixed to dynamic, allowing the skin to move and flex relative to the framework. This dynamic attachment allows stress relief through movement while maintaining structural stability, preventing skin failure under repeated loading cycles.
3Reliability
If heavy-duty components are used throughout the bucket system, then durability is improved, but weight increases
Solution Approach 1:
The patent applies different material properties and structural characteristics to different parts of the bucket system based on their specific functional requirements. Critical load-bearing areas use more robust construction, while non-critical areas use lighter materials, optimizing the overall weight-to-strength ratio rather than uniformly over-engineering the entire structure.
4Manufacturing precision
If the valve system is complex, then control precision is improved, but reliability and ease of maintenance deteriorate
Solution Approach 1:
The patent extracts the valve from its traditional integrated position and makes it a separate, removable component. This allows the valve to be easily removed, inspected, and replaced without disassembling the entire bucket system, significantly improving maintenance ease and reliability while maintaining precise control functionality.
Data Source
AI summary
Aerial fire-fighting bucket systems are disclosed for liquid cargo pickup, transport, and discharge. Bucket systems include rigging to be attached to the long line of an aircraft, the bucket having a pliable skin having an upper edge and a lower edge, an upper frame from which the upper edge of the skin is suspended, and a lower structure to which the lower edge of the skin is attached in a sealed manner. Fixed attachment of the skin by its sealing attachment to the lower structure forms a container for the liquid cargo. Bucket systems include a valve system disposed in the lower structure and optionally a computer-controlled hydraulic motor/pump and accumulator configured to maintain hydraulic pressure, and controls to release liquid cargo from the bucket by a hydraulically-activated flapper valve assembly. Bucket systems may include a power fill system with pump having an outlet comprising a plurality of check valves.