Pipe Coupling Tightening Indicators for Seal Confirmation
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Solution Overview
Problem
Conventional pipe couplings require manual tightening of fasteners to achieve a secure seal and rigidity, lacking visual or tactile indicators to confirm proper installation.
Innovation Solution
Incorporation of installation indicators on the pipe coupling segments that align or overlap to visually or tactily indicate when the coupling is correctly tightened, providing confirmation of a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pipe couplings are used without indicators, then the structure remains simple, but it is impossible to confirm proper installation and sealing
Solution Approach 1:
The patent uses color-coded indicators (such as colored rings, bands, or markings) on the coupling segments that change position or visibility based on the tightening state. When the coupling is properly tightened, the indicators align or disappear to show correct installation, providing visual confirmation without complex mechanisms.
Solution Approach 2:
The patent replaces complex mechanical measurement systems with simple visual indicators. Instead of using gauges, sensors, or complex mechanical feedback systems, the invention uses straightforward visual cues (alignment marks, disappearing gaps, color changes) that can be easily observed without specialized equipment.
2Manufacturing precision
If manual tightening without indicators is used, then the coupling process is quick, but installation precision cannot be ensured
Solution Approach 1:
The patent incorporates immediate visual feedback through indicators that show whether the coupling is properly tightened. As the fastener is tightened, the indicators change position or alignment, providing real-time feedback to the installer about the tightening state, enabling precise installation without requiring multiple checks or complex measurement tools.
Solution Approach 2:
The indicators are pre-positioned on the coupling segments during manufacturing, so that when the coupling is assembled and tightened, the indicators automatically show the correct installation state without requiring any additional setup or calibration steps by the installer.
3Reliability
If visual indicators are added to the coupling, then installation confirmation is improved, but the device complexity increases
Solution Approach 1:
The patent employs color-coded visual indicators such as colored rings, bands, or markings on the coupling segments. These indicators provide clear visual confirmation of proper installation and sealing through color changes or alignment, maintaining simplicity while improving reliability.
Solution Approach 2:
The indicators serve multiple functions: they indicate proper tightening, confirm seal engagement, and provide alignment guidance during assembly. This multi-functionality reduces the need for separate indication systems while comprehensively addressing installation verification needs.
Data Source
AI summary
Disclosed example pipe couplings include: a coupling body having a first coupling segment and a second coupling segment, the first coupling segment having a first lug on a first end and the second coupling segment having a second lug opposite the first lug; a first fastener mounted to the coupling body via the first and second lugs and configured to tighten the pipe coupling; and a first installation indicator on the first lug and arranged to overlap a first indicator face of the second lug as the pipe coupling is tightened, wherein the first installation indicator is in a predetermined alignment with a first counter indicator on the second lug when the pipe coupling is correctly-tightened and is not in the predetermined alignment with the first counter indicator when the pipe coupling is under tightened.