Float Device Fuel Extraction Sediment Control
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Solution Overview
Problem
Conventional float devices for drawing fuel from tanks risk picking up water and sediment when the fuel level is low, and existing solutions require precise filter lengths to fit properly and maximize fuel capacity.
Innovation Solution
A float device with a flexible tube and an elongate, open-ended filter allows the float to extend below the filter when fuel levels are low, accommodating manufacturing tolerances and ensuring maximum fuel draw while filtering out sediment through an apertured float chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the pick-up point is positioned adjacent the bottom of the tank to maximize fuel capacity, then the fuel capacity is maximised, but water and sediment accumulated at the bottom are drawn up with the fuel
Solution Approach 1:
The pick-up point is made dynamic by coupling it to a float that rises and falls with the fuel level. The pick-up point automatically adjusts its position vertically, maintaining a constant distance below the fuel surface rather than being fixed at the tank bottom. This dynamic positioning allows the system to maximize fuel capacity while avoiding sediment contamination.
2Reliability
If the filter length is made long to prevent sediment entry, then filtration is improved, but the device requires precise manufacturing tolerances and may not fit tanks with varying depths
Solution Approach 1:
The filter assembly is made dynamic through the float mechanism, allowing the filter to move vertically with changing fuel levels. This dynamic configuration replaces the need for precise static filter length measurements, enabling the same device to adapt to tanks of varying depths while maintaining effective filtration throughout the fuel range.
Solution Approach 2:
The float-coupled filter assembly serves multiple functions: it provides filtration, automatically adjusts pick-up positioning, and adapts to different tank depths. This multi-functionality allows a single device design to work universally across various tank configurations without requiring precise manufacturing tolerances for specific depths.
3Object-affected harmful factors
If the pick-up point is positioned adjacent the fuel surface to avoid sediment, then contamination is reduced, but the fuel capacity cannot be maximised as the pick-up point cannot reach the bottom
Solution Approach 1:
The pick-up point's vertical position is made dynamic through float coupling, enabling it to automatically adjust between two extreme positions: near the fuel surface when levels are high (avoiding sediment) and near the tank bottom when levels are low (maximizing fuel capacity). This dynamic adjustment resolves the contradiction between contamination avoidance and fuel capacity maximization.
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
Enables proper fitting and maximum fuel extraction from tanks with varying depths, preventing sediment entry and optimizing fuel capacity without requiring precise filter lengths.
Implementation Method 1
a float arranged for rising and falling with the level of liquid in the tank
Implementation Method 2
the chamber comprising an apertured wall forming said filter means
Data Source
AI summary
A float device for use in drawing liquids such as fuel from a tank or other reservoir is disclosed. The device comprises a float arranged for rising and falling with the level of liquid in the tank and a liquid pick-up duct, which comprises a flexible tube having its free end coupled to the float. The float is arranged for vertical movement within a filter or other member, which encloses the float and the flexible tube. The filter or other member is elongate and tubular in construction and comprises an open lower end.