Grounding Coupling for Cable Ducts with Integrated Bonding
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Solution Overview
Problem
Existing grounding solutions for metal cable ducts are complex to assemble and pose a risk of injury to installers, as they require multiple components for coupling and equipotential bonding, and often fail to connect multiple duct sections effectively.
Innovation Solution
A multifunctional grounding coupling with angled tongues and perforated contact tips, made from sheet metal, that securely connects and grounds multiple cable duct sections by pressing into the channel side walls and using a serrated profile for support, allowing for easy assembly and reduced risk of injury.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate components are used for coupling and equipotential bonding, then the functions can be fulfilled, but the assembly becomes complex and time-consuming
Solution Approach 1:
The patent combines the coupling function and equipotential bonding function into a single integrated grounding coupling component. The side elements with tongues provide coupling functionality while simultaneously making electrical contact with the lower part and cover, eliminating the need for separate coupling elements and bonding wires.
Solution Approach 2:
The grounding coupling is designed as a universal component that performs multiple functions: mechanical coupling of duct sections, electrical bonding between lower part and cover, and potential equipotential bonding between adjacent ducts. This multi-functional design simplifies the overall assembly process.
2Reliability
If contact tips are made sharp to ensure electrical contact, then electrical conductivity is improved, but the risk of injury to installers increases
Solution Approach 1:
The patent converts the potentially harmful sharp contact tips into a beneficial self-etching mechanism. The sharp tips are designed to scratch through protective coatings on the duct surface, creating reliable electrical contact, while the coating material fills the scratches to form a protective layer that maintains contact pressure and reliability.
3Ease of operation
If a single component is used for both coupling and bonding, then assembly is simplified, but the component design becomes more complex
Solution Approach 1:
The grounding coupling is segmented into distinct functional zones: side elements with tongues for coupling, contact tips for electrical bonding, and support structures for mechanical stability. This segmentation allows each zone to be optimized for its specific function while maintaining overall component simplicity.
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 grounding coupling simplifies assembly, reduces injury risk, and integrates coupling and equipotential bonding functions in a single component, enabling secure connection and grounding of multiple duct sections while accommodating coated or uncoated surfaces.
Implementation Method 1
the equipotential bonding element is shifted into the cable holding clamp... establish the electrically conductive connection
Implementation Method 2
The spring plate consists of two laterally butt-angled, also rectangular, side parts... a spring plate that can be clamped and connected
Implementation Method 3
the stamped and bent part making electrical contact with the lower part and the cover of the duct
Data Source
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AI summary
The connector has a ceiling element (10), and a side element (14) arranged at a channel outer wall. A side profile (19) is arranged at a middle of the channel, and contact heads (42) electrically contact a channel lower part. A guide (16) is formed at the side element through a triangular free section, and a U-shaped retaining profile (30) is formed at the side profile. The contact heads are formed at the side profile such that the contact heads produce electrical potential equalization with the channel lower part in an inserted condition of the connector.