Pipe Fitting Indicator Assembly for Fast Tightening Verification
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Solution Overview
Problem
Existing pipe fittings require time-consuming quality assurance reviews and are prone to human error due to the need for precise tightening of set screws to ensure a reliable seal and prevent pipe separation.
Innovation Solution
A pipe fitting with a housing, fastener, and dual indicators that provide visual confirmation of proper tightening through radially positioned indicator rings, allowing for easy verification of adequate clamping force without manual measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If set screws are tightened to a certain depth and torque to ensure reliable seal and prevent pipe separation, then connection reliability is improved, but quality assurance review time increases and human error risk increases
Solution Approach 1:
The indicator assembly automatically indicates when the set screw is properly tightened through mechanical interaction with the fastener, eliminating the need for external measurement tools or skilled judgment. The system serves itself by providing visual feedback that confirms proper installation without requiring quality assurance personnel to perform time-consuming measurements or torque checks.
Solution Approach 2:
The indicator assembly uses visual color changes or position changes of indicator elements to communicate the tightening status of the set screw. When the fastener is properly tightened, the indicators display a specific visual state (such as aligned colors or positions) that immediately confirms correct installation, replacing time-consuming measurement processes with instant visual recognition.
2Reliability
If set screws are tightened to a certain depth and torque to ensure reliable seal and prevent pipe separation, then connection reliability is improved, but human error risk increases
Solution Approach 1:
The indicator assembly automatically indicates when the set screw is properly tightened through mechanical interaction with the fastener, eliminating the need for external measurement tools or skilled judgment. The system serves itself by providing visual feedback that confirms proper installation without requiring quality assurance personnel to perform time-consuming measurements or torque checks.
Solution Approach 2:
The patent replaces complex mechanical measurement systems (torque wrenches, depth gauges) with a simple visual indicator system. Instead of requiring operators to use measurement tools and make judgments about proper tightening, the mechanical action of tightening directly drives the indicator to display the correct status, substituting mechanical measurement with visual confirmation.
3Productivity
If dual indicator rings are positioned radially outwardly of the fastener to provide visual indication, then verification speed is improved, but device complexity increases
Solution Approach 1:
The indicator assembly uses the existing fastener structure as part of the indication mechanism. The fastener itself serves dual purposes: it provides the clamping force to secure the pipe connection and simultaneously drives the indicator elements to display the tightening status. This multi-functionality reduces overall device complexity while maintaining verification speed.
Solution Approach 2:
The indicator elements are nested within or around the fastener structure, with the first and second indicator rings positioned radially outwardly of the fastener. This nested arrangement allows the indicators to be integrated into the existing assembly without adding significant complexity, as the indicators utilize the fastener's radial space and mechanical motion.
Data Source
AI summary
A fitting includes a fitting body defining a hole; and an indicator assembly comprising a fastener extending through the hole, a first indicator mounted on the fastener, and a second indicator mounted on the fastener, the fastener defining a fastener axis; wherein the second indicator is axially in between the first indicator and the fitting body upon the fastener being oriented in a first position, and wherein the second indicator is radially inwardly or radially outwardly of the first indicator upon the fastener being oriented in a second position.