Cable Entry Sealing and Retention for Telecom Closures
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Solution Overview
Problem
Existing methods for introducing telecommunication cables into enclosures, such as fiber terminals, result in exposed cable segments prone to damage and inadequate sealing, leading to potential fiber damage and moisture ingress.
Innovation Solution
A cable attachment device with a housing featuring multiple seals and retaining arrangements that securely fixes the cable and protective tube within the enclosure, providing watertight protection and preventing movement, with seals on the device's outer surface for easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas block or water block type connector is used to separate the cable from the protective tube, then the cable can be introduced into the enclosure, but exposed cable segments remain prone to damage and the connector is bulky taking up significant space
Solution Approach 1:
The patent combines the gas block/water block connector functions with the enclosure structure itself. The enclosure includes an integrated cable access mechanism where the cable can be separated from the protective tube directly at the enclosure wall, eliminating the need for a separate bulky connector. This merging of functions reduces the overall volume while maintaining cable protection and access capabilities.
Solution Approach 2:
The patent extracts the cable separation function from a separate connector component and integrates it directly into the enclosure structure. By taking out the connector as a standalone element and incorporating the separation mechanism into the enclosure wall, the design eliminates the need for additional bulky components while maintaining the same protective function.
2Ease of manufacture
If the protective tube is fed directly into the closure without a connector, then the installation is simpler, but the cable is not fixed relative to the closure leading to movement and fiber damage
Solution Approach 1:
The patent merges the cable fixation function with the enclosure structure. The enclosure includes integrated retaining features such as clips, clamps, or engagement mechanisms built into the wall structure that securely hold the cable in place. This combination maintains installation simplicity while ensuring reliable cable fixation to prevent movement and fiber damage.
Solution Approach 2:
The patent introduces intermediary fixation elements (such as clips, clamps, or engagement features) that act as mediators between the protective tube and the enclosure wall. These intermediary components provide secure mechanical attachment while maintaining the direct-feed installation approach, preventing cable movement without requiring complex connectors.
3Ease of operation
If the cable is fed directly into the closure without adequate sealing, then the installation is simpler, but moisture can penetrate into the tube causing damage
Solution Approach 1:
The patent combines the sealing function with the cable access mechanism in the enclosure wall. The integrated design includes sealing elements (such as gaskets, seals, or weatherproofing features) that are incorporated into the wall structure itself, providing moisture protection while maintaining ease of cable installation through the same integrated mechanism.
Solution Approach 2:
The patent introduces intermediary sealing elements (such as gaskets, seals, or weatherproofing components) that act as mediators between the external environment and the enclosure interior. These sealing components are integrated into the cable access mechanism, providing moisture protection without complicating the installation process.
Data Source
AI summary
A cable attachment device for sealing and retaining a communications cable entering a telecommunications closure through an opening defined in the closure is disclosed, the device comprising: a housing having a passage through which the communications cable extends, the housing having a first portion and a second portion; wherein the first portion of the housing is configured to receive a protective tube of the telecommunications cable; wherein the second portion of the housing is configured to engage with the closure; a first seal configured to form a seal between the device and the closure; a second seal configured to form a seal between the interior of the device and the protective tube; a third seal configured to seal between the communications cable and the interior of the device; a first retaining arrangement configured to couple the device to the closure; a second retaining arrangement configured to hold the tube relative to the device; and a third retaining arrangement configured to fix the telecommunications cable relative to the device.