Clevis-Sensing Adjustable Hook Latch for Aircraft
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Solution Overview
Problem
Aircraft latches can inadvertently appear locked when clipped in a closed position, leading to potential interference with complete locking and unintended unlatching during operation, as they may not be properly secured or locked.
Innovation Solution
A clevis-sensing mechanism integrated with the latch mechanism, including a hook, handle, linkage, and detent, which blocks the handle from moving to a closed position unless the hook is properly engaged with a clevis, ensuring the latch is securely locked and preventing accidental unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the latch is clipped in a closed position to prevent bumping, then the latch profile is reduced and bumping is prevented, but the latch may appear locked when actually unsecured and may fail to lock properly
Solution Approach 1:
The patent employs a sensing mechanism that provides feedback to verify proper latch-clevis engagement. A sensor detects whether the latch is correctly positioned within the clevis and provides visual feedback (such as a window displaying a checkmark or X) to indicate whether the latch is properly secured, eliminating the ambiguity of clipped positions
Solution Approach 2:
The patent introduces an intermediary sensing mechanism between the latch and clevis that detects their relative positioning. This intermediary system includes sensors and indicators that mediate the interaction between the operator and the latch system, providing clear information about engagement status without requiring direct observation of the mechanical connection
2Ease of operation
If the latch mechanism is simplified for ease of operation, then operation speed increases, but the ability to detect proper engagement decreases
Solution Approach 1:
The patent utilizes visual indicators that change appearance or display different states to indicate engagement status. A window or indicator panel may display a checkmark for proper engagement or an X for improper engagement, providing immediate visual feedback that is easy to detect without complicating the mechanical operation
Solution Approach 2:
The system provides immediate visual feedback about engagement status through sensors that detect the relative positions of the latch and clevis. This feedback mechanism allows operators to quickly verify proper engagement without requiring complex procedures or additional manual checking steps
Data Source
AI summary
A latch mechanism includes a hook, a displaceable handle, and links connected between the handle and hook for the operation of the latch mechanism. The handle and links cooperate with the hook to hold the latch mechanism in a locked position.