Weatherproof Box Clamping Hub Radial Seal Compression
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Solution Overview
Problem
Existing electrical box clamping mechanisms fail to provide a reliable and efficient weatherproof seal for conduits, leading to a need for improved conduit clamping assemblies that can securely attach and seal conduits to electrical boxes.
Innovation Solution
A clamping assembly featuring a coupling ring and an elastic seal member within the electrical box's access port, where an actuator compresses the coupling ring to form a weatherproof seal by applying an inward radial force against the conduit, utilizing a recessed design with a cover plate to retain the seal and ring, and an actuator screw to tighten the clamping engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional clamping mechanisms are used, then the conduit can be attached to the electrical box, but a reliable weatherproof seal cannot be achieved
Solution Approach 1:
The patent implements nesting by placing the seal member inside the coupling ring, which is then inserted into the access port. The actuator is positioned within the electrical box and engages the coupling ring from the inside. This nested arrangement allows multiple functional components (seal, coupling mechanism, actuator) to be integrated in a compact configuration that achieves reliable weatherproof sealing without excessive complexity.
Solution Approach 2:
The seal member acts as an intermediary element between the conduit and the electrical box. When the actuator compresses the coupling ring, the ring transmits force to compress the seal member against the conduit, creating the weatherproof seal. This intermediary seal mechanism resolves the contradiction by providing reliable sealing through a dedicated sealing component rather than relying on the clamping mechanism alone.
2Reliability
If a clamping mechanism with seal is used, then weatherproof sealing is achieved, but the connection process becomes time-consuming
Solution Approach 1:
The coupling ring and seal member are pre-assembled as a unit before insertion into the access port. The actuator is pre-positioned within the electrical box to engage the coupling ring. This preliminary preparation allows the installer to simply insert the conduit and activate the actuator, significantly reducing connection time while maintaining the reliability of the weatherproof seal.
Solution Approach 2:
The actuator is designed to be accessible from within the electrical box, allowing it to be operated after the conduit is inserted. The coupling ring automatically positions the seal member against the conduit when compressed, and the mechanism self-secures without requiring additional fastening steps. This self-service design eliminates time-consuming manual sealing operations.
3Ease of manufacture
If the seal and coupling ring are exposed, then assembly is simple, but the seal is vulnerable to damage and environmental factors
Solution Approach 1:
The coupling ring is inserted into the access port of the electrical box, and the seal member is nested inside the coupling ring. This nested configuration provides protective enclosure for the seal, shielding it from environmental factors and physical damage while maintaining assembly simplicity. The electrical box structure itself serves as the outer protective layer.
Solution Approach 2:
The seal member is designed as a flexible elastic element that can be compressed by the coupling ring. This flexible seal design allows it to conform to the conduit surface while being protected by the rigid coupling ring and electrical box structure. The flexible nature ensures continuous contact for effective sealing while the surrounding structures provide durability protection.
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 solution provides a quick and secure connection with a weatherproof seal, ensuring the conduit is effectively clamped and sealed to the electrical box, enhancing durability and environmental resistance.
Implementation Method 1
The seal has a substantially annular shape and is received in the access port to be positioned between the conduit and the inner surface of the access port. The coupling ring has an annular shape and fits around the seal. A clamping or actuator member in the electrical box compresses the coupling ring to reduce the inner diameter of the ring to apply an inwardly directed radial force to compress the seal against the surface of the conduit
Data Source
AI summary
An electrical box assembly includes an electrical box having a side wall and an open top end and a conduit access port opening extending through the side wall and having a dimension to receive a conduit. A seal is received in the opening for surrounding the conduit. A clamp is positioned in the opening in the side wall and is positioned between the side wall and the seal for contacting an outer surface of the seal. An actuator is coupled to the electrical box and extends through the side wall into the opening in the side wall to contact the conduit clamp to constrict said conduit clamp and seal into clamping engagement with the conduit.