Locking device for locking a mechanism of an aircraft

The locking device addresses the issue of insufficient force in opening aircraft hooks by using a two-stage torque transmission system with a spring element and lever cam/roller, ensuring reliable operation even in blocked conditions.

DE102017118128B4Active Publication Date: 2026-06-03LIEBHERR AEROSPACE LINDENBERG GMBH
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Patent Information

Application Number
DE102017118128
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2016-09-15
Filing Date
2017-08-09
Publication Date
2026-06-03
Estimated Expiration
2037-08-09

AI Technical Summary

Technical Problem

Existing locking devices for aircraft mechanisms struggle to reliably open a hook from a locked to an unlocked position due to insufficient force from a spring element, especially in conditions like icing or contamination, leading to blockages.

Method used

A locking device design that transmits torque via a spring element in a first angular range and via both the spring element and a lever cam and roller in a second angular range, ensuring reliable opening even in the presence of blockages.

Benefits of technology

Ensures safe and reliable opening of the hook by increasing the maximum transmissible torque beyond what a single spring element can provide, effectively overcoming blockages caused by icing or contamination.

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Abstract

Locking device (1) for locking a mechanism of an aircraft, comprising a lever (2) and a hook (3), wherein the lever (2) and the hook (3) are pivotably mounted about two axes spaced apart from each other, and wherein a spring element (4) is provided between the lever (2) and the hook (3), and a lever cam (5) and a roller (6) are provided on the lever (2) and / or the hook (3) for transmitting a torque between the lever (2) and the hook (3), characterized in that the locking device (1) is designed to transmit the torque solely via the spring element (4) in a first angular range of the hook (3), and in a second angular range of the hook (3) following the first angular range, to transmit the torque both via the spring element (4) and via the lever cam (5) and the roller (6).
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Citation Information

Patent Citations

  • Interlocking system and method of operating an interlocking system

    DE102007032779A1