High Temperature Bushings with M-Shaped Cross-Section
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Solution Overview
Problem
Current bushing designs for high temperature applications are inadequate, expensive, and require cumbersome modifications to clamps, leading to inconsistency and potential damage, especially when temperatures exceed 316 °C (600 °F), as standard materials like Teflon melt and custom metal bushings are not universally compatible with various clamp designs.
Innovation Solution
A high temperature bushing design featuring a single-piece metal body with an 'M' shaped cross-section, including concave arcs forming a rounded channel for secure interference fit and snap-on attachment to clamps, made from heat-resistant materials like stainless steel or Inconel, which prevents lateral movement and provides strain relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If standard Teflon bushings are used, then ease of manufacture and cost are improved, but temperature resistance deteriorates (cannot withstand temperatures above 316°C/600°F)
Solution Approach 1:
The patent changes the material parameter from Teflon (polymer) to stainless steel or Inconel (metal alloys), transforming the bushing from a low-temperature application component to a high-temperature capable component. This material substitution enables the bushing to withstand temperatures above 316°C while maintaining structural integrity.
2Temperature
If custom metal bushings are designed for specific clamps, then temperature resistance is improved, but adaptability deteriorates (not compatible with other clamp types)
Solution Approach 1:
The bushing design incorporates a snap-on attachment mechanism with tabs that can engage with various clamp types (P-clamps, dual clamps, etc.), making a single bushing design universally compatible across multiple clamp configurations. This eliminates the need for custom-designed bushings for each clamp type while maintaining high-temperature capability.
3Strength
If bushings are rigidly affixed to clamps, then strength and stability are improved, but ease of operation deteriorates (clamp must be disassembled for attachment, causing potential damage)
Solution Approach 1:
The bushing transitions from a static rigidly-attached state to a dynamic snap-on attachment system. The tabs can be easily inserted through clamp slots and secured by snapping into place, allowing for quick installation and removal without disassembling the clamp structure, thereby improving ease of operation while maintaining attachment strength.
4Temperature
If custom metal bushings are manufactured, then temperature resistance is improved, but productivity deteriorates (long lead time and high cost)
Solution Approach 1:
The bushing is designed as a separate, modular component that can be manufactured independently and then attached to various clamp types. This segmentation allows for standardized mass production of the bushing component, reducing manufacturing complexity, lead time, and cost compared to custom-manufactured integrated solutions.
Data Source
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AI summary
A bushing (30) primarily for use in high temperature applications. In preferred embodiments the bushing comprises a rounded body formed from a single piece of metal wherein the body has an "M" shaped cross-section with a first outer leg (32), second outer leg (34), first inner leg (36) and second inner leg (38), and wherein the first outer leg and second outer leg are both concave arcs about a central axis (42) and form an outer circumference of the rounded body and wherein the first inner leg and second inner leg each have an arc formed in the leg to create a rounded channel that extends a longitudinal length of the rounded body along the central axis; and wherein the first inner leg and second inner leg transition between each other in a third concave arc (46).