Catalytic Converter Locking Assembly With Braided Cable Anchoring
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Solution Overview
Problem
The increasing value of precious metals in catalytic converters has led to thefts, as thieves seek to extract these metals for resale, posing a challenge for securing these converters on vehicles.
Innovation Solution
A catalytic converter locking device comprising layered stainless steel plates, bolts, tamper-resistant screws, and a braided metal cable, which is wrapped around the converter and anchored to the vehicle's underbody, providing a secure and deterrent-rich locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple cable lock is used to secure the catalytic converter, then the device complexity is low and installation is easy, but the security effectiveness is insufficient as thieves can cut through the cable quickly
Solution Approach 1:
The locking device is divided into multiple independent components: a locking assembly with layered plates and bolts, a separate braided cable, and mounting brackets. This segmentation allows each component to perform its specific function while maintaining overall system security. The cable is segmented into multiple strands that are individually cut by thieves, increasing the time and effort required compared to a single solid cable.
Solution Approach 2:
The locking device combines multiple materials with different properties: stainless steel plates and bolts for structural strength and tamper resistance, braided metal cable for flexibility and cut resistance, and tamper-resistant screws for secure mounting. This composite approach creates a locking system that is both secure and adaptable to different installation locations.
2Reliability
If a secure locking device with multiple components is used, then the security effectiveness improves, but the ease of installation deteriorates due to complex assembly requirements
Solution Approach 1:
The locking plates are pre-assembled with bolts and tamper-resistant screws before installation. The braided cable is pre-formed into a loop configuration. This preliminary assembly reduces the complexity of the installation process, as the installer only needs to mount the pre-assembled locking assembly to the vehicle frame and thread the pre-formed cable through the converter, rather than assembling all components on-site.
3Reliability
If the cable is made thicker and stronger to prevent cutting, then the security improves, but the weight of the locking device increases
Solution Approach 1:
Instead of using a single thick solid cable, the invention uses a braided metal cable constructed from multiple thin flexible strands. This braided structure provides high tensile strength and cut resistance comparable to thicker solid cables, while maintaining flexibility for installation around the catalytic converter and vehicle frame. The flexible nature of the braided construction allows the cable to conform to complex geometries without requiring excessive thickness.
4Reliability
If tamper-resistant screws and bolts are used to prevent unauthorized removal, then the security improves, but the ease of repair and maintenance deteriorates
Solution Approach 1:
The locking device uses tamper-resistant screws and bolts that are designed to be difficult to remove without proper tools. These fasteners incorporate security features such as non-removable heads or specialized drive mechanisms that prevent unauthorized removal. While this makes unauthorized theft more difficult, legitimate maintenance can still be performed by mechanics with appropriate tools, balancing security with maintainability.
Data Source
AI summary
The present invention comprises a number of layered stainless steel plates, a plurality of bolts and tamper-resistant screws, and a length of cable. A temporary bolt head holder can be included to keep the bolt heads in place. The plates can be held apart by a plurality of springs temporarily placed between the plates. The cable is then wrapped around the catalytic converter and threaded between openings between the plates. After this, the bolt holder can be removed. When the bolts are tightened, they create a “clamping” force that securely holds the cable in place. A protective cover is then placed over the catalytic converter and secured to the other plates and cable using tamper-resistant screws. The cable is also wrapped around other underbody structure of the vehicle to further compound the amount of anti-theft security that is provided by the lock and assembly of the present invention.