Pneumatic Panel Fasteners for Simultaneous Aircraft Access Closure
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Solution Overview
Problem
Modern aircraft access panels require numerous screws for secure closure, making the installation and removal process labor-intensive and inefficient.
Innovation Solution
A pneumatically controlled fastener assembly comprising male and female fasteners that use air pressure to simultaneously secure and release, minimizing the need for manual screwing and unscrewing by using spring-loaded pins and cam shaft mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If numerous screws are used to secure access panels, then panel closing integrity and reliability are improved, but labor intensity and installation time increase
Solution Approach 1:
The patent employs pneumatic actuators to automatically drive fasteners, replacing manual screwing operations. Compressed air is supplied through pneumatic lines to actuators that are coupled to the fasteners, enabling automated insertion and removal of multiple fasteners simultaneously, thus maintaining panel integrity while dramatically reducing labor intensity and installation time
Solution Approach 2:
The patent replaces the traditional manual mechanical screwing operation with an automated pneumatic-mechanical system. The pneumatic actuators convert pneumatic energy into mechanical motion to drive the fasteners, substituting human labor with an automated mechanical system that can operate multiple fasteners in parallel
2Reliability
If manual screwing operations are used, then fastener installation is simple and reliable, but labor intensity increases and aerodynamic efficiency is compromised due to exposed fastener heads
Solution Approach 1:
The pneumatic actuation system enables fasteners to be driven automatically into recessed positions, ensuring that fastener heads do not extend beyond the outer mold line of the aircraft body. The pneumatic system provides consistent, controlled force that ensures reliable fastener installation while maintaining the aerodynamic surface by keeping fasteners flush or recessed
3Reliability
If multiple fasteners are used to secure panels, then panel security and reliability are improved, but the time required to remove and install panels increases
Solution Approach 1:
The patent combines multiple fastener operations into a single pneumatic actuation cycle. By connecting multiple actuators to a common pneumatic line, the system can simultaneously drive multiple fasteners across the entire panel, transforming what would be sequential manual operations into a parallel automated process, thereby maintaining panel security while dramatically reducing the time required for panel removal and installation
Solution Approach 2:
The pneumatic system enables continuous operation for fastener installation and removal. The actuators can rapidly cycle through multiple fasteners without the interruptions inherent in manual operations, maintaining continuous useful action throughout the panel securing process, which reduces total time while ensuring all fasteners are properly secured
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
Facilitates rapid and efficient attachment and detachment of aircraft access panels, reducing labor and maintaining aerodynamic efficiency by minimizing exposed fastener heads.
Implementation Method 1
a spring positioned in the recess and against the insertion end
Implementation Method 2
a cam shaft having a threaded tip threaded into the threaded bore in the male piston, a wide portion including a recess facing the insertion end and a tapered portion between the threaded tip and the wide portion
Implementation Method 3
Applying air pressure to the port in the male fastener causes the piston and the cam shaft to move towards the insertion end of the hollow body
Data Source
AI summary
A fastening system including a plurality of male fasteners and a plurality of female fasteners, where each one of the male fasteners is configured and positioned to be inserted into one of the female fasteners. An air delivery subsystem configured to deliver air to the male and female fasteners in a manner that simultaneously actuates the plurality of male fasteners and simultaneously actuates the plurality of female fasteners so as to simultaneously couple and decouple the male and female fasteners. In one embodiment, the male fasteners are mounted to an aircraft access panel and the female fasteners are mounted to an aircraft body.