Curb Box Lock with Threaded Rod Claw Adjustment
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Solution Overview
Problem
Existing curb box locks lack permanent security measures for shallow and wide boxes, as their claws are not always deployed with significant force, and they have a complex structure that increases manufacturing costs and complexity.
Innovation Solution
A curb box lock with slidably extendable claws and an adjustment mechanism that maintains engagement with the box walls at all times, using a specialized tool to extend or retract the claws via a threaded rod, ensuring the claws remain fixed and prevent removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If claws are deployed only upon unauthorized removal attempt, then the lock structure can be simpler, but security is insufficient for shallow and wide boxes
Solution Approach 1:
The claws are extended preliminarily upon installation of the lock, rather than waiting for unauthorized removal attempt. This preliminary action ensures that the claws are already engaged with the box interior walls, providing continuous security prevention for shallow and wide boxes where delayed deployment would be ineffective.
Solution Approach 2:
The lock incorporates a threaded rod mechanism that allows dynamic adjustment of the claws between extended and retracted positions. This dynamic capability enables the claws to be extended for security during normal operation and retracted for authorized removal, resolving the contradiction between continuous security and operational flexibility.
2Reliability
If more components are added to improve security, then security is enhanced, but manufacturing complexity and cost increase
Solution Approach 1:
The threaded rod serves multiple functions: it acts as both the extension mechanism for the claws and the removal mechanism when reversed. By combining these two functions into a single component, the design enhances security without adding separate complex mechanisms, thereby maintaining ease of manufacture.
Solution Approach 2:
The threaded rod mechanism provides universal functionality by enabling both claw extension for security engagement and claw retraction for authorized removal through the same component. This multi-functionality reduces the need for additional specialized components, simplifying manufacturing while improving security.
3Reliability
If claws are extended at all times, then security is improved, but authorized removal becomes more difficult
Solution Approach 1:
The threaded rod mechanism enables dynamic transition of the claws between extended and retracted states. During normal operation, the claws remain extended for security. When authorized removal is needed, the threaded rod is reversed to retract the claws, allowing easy removal by authorized personnel while maintaining security during normal use.
Solution Approach 2:
The position of the claws is changed from a fixed state to a variable state controlled by the threaded rod. By changing the parameter of claw position (extended vs. retracted) based on operational needs, the system maintains security when claws are extended while enabling easy removal when retracted, resolving the contradiction between security and ease of authorized removal.
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
The lock provides enhanced security by maintaining claws extended with significant force at all times, reducing the risk of unauthorized removal and simplifying manufacturing with fewer components, thus lowering costs and improving ease of use.
Implementation Method 1
using a specialized tool to extend or retract the claws via a threaded rod
Data Source
AI summary
A curb box lock that includes a body portion and a plurality of slidably extendable claws within the body portion. The claws being extendable from the body portion to selectively engage side walls of a curb box. The lock also includes an adjustment mechanism operatively connected to the claws and the body portion. The adjustment mechanism selectively extends the claws such that the claws can be maintained in engagement with the side walls at all times when the lock is deployed within a curb box to prevent removal of the lock.