Torque-Locking Tire Valve Cap for Anti-Tamper Corrosion Protection
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Solution Overview
Problem
Existing tire valve caps are vulnerable to corrosion and unauthorized tampering, and existing protective devices are difficult to install and remove.
Innovation Solution
An anti-theft valve cap system featuring a sleeve with internal mating threads and a torque locking surface that engages with a locking wrench to create a compression tension lock, preventing removal without an external tool, combined with a valve cap that securely covers the valve stem.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple plastic cap is used to cover the valve stem, then the valve is vulnerable to unauthorized tampering and manipulation, but the device complexity remains low
Solution Approach 1:
The invention employs a nested structure where an inner cap is placed inside an outer cap, creating a multi-layered protective system. The inner cap contains the valve stem while the outer cap provides additional protection and features a torque-locking mechanism with a locking surface that requires a specific tool for removal, thereby preventing unauthorized tampering without excessive complexity
Solution Approach 2:
The outer cap acts as an intermediary element between the user and the valve stem. It includes a torque-locking mechanism with a locking surface that mediates the removal process by requiring a specific tool, thus preventing direct access to the valve stem while maintaining a relatively simple overall structure
2Reliability
If existing protective devices are installed on the valve stem, then the valve is protected from corrosion and tampering, but the devices are difficult to install and remove
Solution Approach 1:
The protective device is segmented into two distinct parts: an inner cap that fits directly on the valve stem and an outer cap that provides additional protection. This segmentation allows the inner cap to be easily installed and removed by users, while the outer cap can be securely attached or removed as needed, balancing protection with ease of operation
Solution Approach 2:
The inner cap is designed to be easily installed and removed by users without requiring special tools, enabling self-service maintenance. The outer cap features a torque-locking mechanism that, while requiring a tool for secure removal, can be left in place to provide continuous protection, thus allowing users to benefit from both easy installation and enhanced security
3Reliability
If a torque locking mechanism is added to prevent removal without tools, then the valve cap is protected from unauthorized removal, but the device complexity increases
Solution Approach 1:
The torque-locking mechanism is implemented locally on the outer cap rather than throughout the entire device. The locking surface is positioned specifically on the outer cap to engage with a corresponding tool, providing security only where needed while keeping the rest of the structure simple and easy to manufacture
Data Source
AI summary
An anti-theft tire valve includes: (a) a sleeve defining an outer wall and an pass-through channel to receive a threaded valve stem and allow a portion of the threaded valve stem to extend through an upper portion of the sleeve; (b) an internal threaded portion positioned within the upper portion of the sleeve configured to securely engage the threaded valve stem; (c) a torque locking surface defined on an external surface of the upper portion of the sleeve; and (d) a valve cap forming a cover and defining an internal thread configured to receive the threaded valve stem and abut an upper rim of the sleeve. The torque locking surface is configured to receive a locking wrench to rotate in a counter direction and press against the valve cap forming a tension lock configured to restrict the removal of the valve cap without the use of an external tool.