Hidden-Lock Access Hole Cover for Tamper-Resistant Road Structures
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Solution Overview
Problem
Existing maintenance covers in freeways, overpasses, and bridges are vulnerable to unauthorized access and tampering, posing safety risks and maintenance challenges due to their visible fasteners and lack of secure locking mechanisms.
Innovation Solution
A cover system with a hidden locking mechanism, comprising a cover plate and frame, includes guide tubes, cover and frame brackets, and a tool post with inner and outer plugs to prevent unauthorized access, ensuring secure attachment and tamper resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If simple fasteners such as bolts or screws are used to retain maintenance covers, then the cover system is easy to manufacture and install, but the cover becomes visibly accessible and vulnerable to unauthorized removal
Solution Approach 1:
The patent extracts the fastening mechanism from visible exposure by incorporating it within the cover structure itself. The recessed fastening holes and internal locking mechanisms are concealed within the cover plate, eliminating the visible fasteners that previously made the system vulnerable to unauthorized removal while maintaining ease of manufacture through integrated design features.
Solution Approach 2:
The patent implements nesting by placing multiple security features within nested structures. The cover plate contains recessed fastening holes, which in turn accommodate hidden fasteners. The locking mechanism is nested within the cover frame, creating layered protection where each component is contained within a larger protective structure, thereby securing the cover while maintaining manufacturing simplicity.
2Reliability
If maintenance covers are made securely locked to prevent unauthorized access, then security against tampering is improved, but the complexity of the locking system increases
Solution Approach 1:
The patent segments the locking system into distinct functional components: cover brackets for attachment, guide tubes for alignment, and hidden fasteners for securing. Each component performs a specific function and can be manufactured separately, reducing overall complexity while maintaining security. The segmented design allows for easier installation and maintenance compared to a monolithic locking system.
Solution Approach 2:
The patent introduces guide tubes as intermediary elements between the cover plate and cover frame. These guide tubes facilitate the alignment and insertion of fasteners while maintaining the hidden locking mechanism. The guide tubes act as mediators that simplify the interaction between components, reducing the complexity of the overall locking system while ensuring secure attachment through precise alignment.
3Device complexity
If access holes are covered with simple covers, then the structure remains simple and easy to install, but unauthorized individuals can easily remove the covers to enter crawl spaces
Solution Approach 1:
The patent applies preliminary anti-action by incorporating pre-designed security features into the cover structure before unauthorized removal can occur. The recessed fastening holes and hidden fasteners are pre-installed within the cover plate, creating built-in resistance against unauthorized removal. This preliminary security measure prevents tampering without requiring complex additional components, maintaining structural simplicity while effectively blocking unauthorized access.
4Reliability
If hidden locking systems are implemented to prevent tampering, then security and structural integrity are maintained, but the difficulty of installation increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring the cover plate with recessed fastening holes and guide tubes during manufacturing. These pre-prepared features eliminate the need for complex field adjustments or modifications during installation. The hidden fasteners are pre-positioned within the recessed holes, allowing installers to simply attach the cover to the frame without dealing with complex locking mechanisms, thereby maintaining ease of installation while achieving tamper resistance.
Data Source
AI summary
A cover system including a hidden locking system for providing controlled entry into access holes provided in overpasses, bridges, roads, or freeways. The cover system includes a cover removably attached to a cover frame installed about an access hole. The cover includes locking elements to prevent tampering with the cover by unauthorized individuals. The locking elements include the coordinated function of cover brackets aligned with guide tubes that are used for inserting a tool for fastening or unfastening the cover, a tool post having windows that align with each guide tube for insertion of the tool, and an inner and outer plug to provide controlled access to the hidden locking system. The cover frame includes a frame plate having a frame opening to receive the cover plate therein, frame brackets, frame bracers, support rods, and frame supports for affixing the cover frame securely in position about an access hole.