Pipe Fitting Fastener Indicators for Tightening Verification
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Solution Overview
Problem
Existing pipe fitting systems require time-consuming quality assurance reviews to ensure proper tightening of set screws, which are prone to human error, leading to potential leaks and instability in pipe connections.
Innovation Solution
A pipe fitting system with a housing, fastener, and dual indicators that provide a visual confirmation of proper tightening, ensuring secure pipe connections by using a first and second indicator assembly that slides radially to indicate when the necessary clamping force is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If quality assurance reviews are conducted by measuring set screw depth or torque, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent replaces mechanical measurement systems (torque wrenches, depth gauges) with a visual indicator system. The indicator assembly includes an indicator member that moves relative to a housing to provide visual feedback on set screw tightening status, eliminating the need for time-consuming mechanical measurements while maintaining measurement precision.
Solution Approach 2:
The indicator system is self-actuating through the movement of the set screw. As the set screw is tightened, it directly drives the indicator member to move and display the tightening status visually, without requiring external measurement tools or operators to perform manual measurements.
2Measurement precision
If quality assurance reviews are conducted manually, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex manual measurement processes with a simple visual indicator mechanism. The indicator assembly consists of an indicator member, a spring, and a housing that work together to provide immediate visual feedback on tightening status, eliminating the need for complex measurement procedures and training.
Solution Approach 2:
The indicator system creates a visual copy or representation of the set screw tightening status. The indicator member's position visually replicates the mechanical state of the set screw, allowing operators to assess tightening quality without performing actual measurements.
3Reliability
If set screws are tightened to ensure reliable seal, then reliability is improved, but loss of time increases
Solution Approach 1:
The indicator system provides automatic visual feedback during the tightening process. As the set screw is tightened, the indicator member moves to show when the correct tightening level is reached, allowing installers to achieve reliable seals quickly without time-consuming verification steps.
Solution Approach 2:
The indicator assembly provides real-time visual feedback on set screw tightening status. The indicator member's position changes in response to set screw movement, giving immediate feedback to the installer on whether the reliable seal threshold has been achieved, enabling rapid and reliable installation.
Data Source
AI summary
An indicator assembly includes a fastener defining a first end, a second end opposite the first end, and an axis extending from the first end to the second end; a first indicator positioned radially outwardly of the fastener relative to the axis of the fastener; and a second indicator positioned radially outwardly of the fastener relative to the axis of the fastener, wherein the second indicator is axially in between the first indicator and the second end of the fastener 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.