Filter Interlock Tabs Prevent Canister Element Drop
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Solution Overview
Problem
Existing canister style filter systems fail to maximize water removal from fuels and often result in the filter element falling out during installation due to inadequate retention mechanisms.
Innovation Solution
A filter element with a cylindrical configuration and central fluid supply tube that allows upward fuel flow to enhance water removal, combined with a pedestal and canister design featuring slots and tabs for secure retention and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the filter element is designed without retention features, then the assembly process is simpler, but the filter element falls out of the canister during installation
Solution Approach 1:
The filter element is segmented with multiple tabs distributed around its circumference, each engaging with corresponding slots in the canister. This segmentation provides distributed retention points that securely hold the filter element without requiring complex fastening mechanisms, thus maintaining assembly simplicity while ensuring reliable retention.
Solution Approach 2:
The tabs and slots act as intermediary retention features between the filter element and the canister. These intermediaries provide a simple yet effective connection mechanism that prevents the filter element from falling out during installation while avoiding the need for complex fasteners or adhesive systems.
2Device complexity
If fuel flows upward into the filter media, then the filter structure is simpler, but water droplets do not collect properly in the water bowl
Solution Approach 1:
The flow path is redirected from a purely upward vertical flow to a multi-dimensional flow pattern. Fuel is forced to flow upward initially, then is redirected to flow downward along the filter media surface toward the water bowl. This dimensional change in flow path allows proper water collection while maintaining relatively simple filter structure.
Solution Approach 2:
Instead of allowing fuel to flow directly upward through the filter media, the design inverts the expected flow pattern by forcing fuel to flow upward first, then redirecting it to flow downward along the filter media. This inverted approach ensures water droplets collect properly in the water bowl rather than being carried upward with the fuel flow.
3Ease of manufacture
If the center tube provides only minimal support, then the filter element is easier to manufacture, but the filter element cannot be securely retained when the canister is tipped
Solution Approach 1:
The center tube is segmented with multiple tabs extending from it, rather than being a simple continuous tube. These tabs provide multiple contact points with the canister slots, significantly improving stability when the canister is tipped or handled, while adding minimal manufacturing complexity compared to a solid center tube design.
Solution Approach 2:
The retention mechanism transitions from relying solely on vertical centering (one dimension) to incorporating radial engagement through tabs extending in multiple directions. This multi-dimensional retention approach provides stability against tipping and handling forces while maintaining manufacturing simplicity.
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 effectively maximizes water removal from fuels and prevents the filter element from falling during installation by ensuring secure positioning and retention within the canister.
Implementation Method 1
a fuel-water separator that maximizes the amount of water that is removed
Implementation Method 2
water droplets that have been separated from the fuel to desirably collect in the collection bowl
Implementation Method 3
another fuel filter is connected in series or inline with the fuel-water separator that focuses on removing debris from the fuel
Data Source
AI summary
A pedestal for use with a canister filter system and a filter element for positioning and retaining the filter element in the canister filter system includes an at least partially annular body defining a longitudinal axis, a radial direction, and a circumferential direction. Also, the pedestal includes an annular wall that terminates at a bottom free end, and that defines a slot that extends axially upwardly and circumferentially from the bottom free end. A flow aperture extends through the annular wall that is disposed axially above the slot.