Fast Rope Insertion System With Self-Locking Attachment
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Solution Overview
Problem
Conventional tethered systems for descending or ascending users from elevated locations are cumbersome, requiring two hands for connection and balance, and lack the ability for users to control or halt their descent, especially in dangerous or equipment-laden situations.
Innovation Solution
A user insertion system comprising a belay tether, an attachment device with rotatable hooks for quick engagement, a user braking system with a pulley and brake mechanism for controlling descent, and a tip resistant system with auxiliary tethers for maintaining upright attitude and quick disconnect features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional snap rings are used to connect the belay tether to the support, then the connection can be made with standard components, but the connection process requires two hands and significant effort
Solution Approach 1:
The attachment device is divided into multiple functional components: a body portion with a first opening for support engagement, a second opening for tether engagement, and a biasing member mechanism. This segmentation allows each component to perform its specific function independently, enabling one-handed operation while maintaining manufacturing simplicity
Solution Approach 2:
The biasing member automatically engages the support structure when the attachment device is installed, eliminating the need for manual intervention to maintain the engaged state. The device self-locks through the biasing force, allowing one-handed operation while using standard manufacturing processes
2Ease of operation
If the user grasps the belay tether with one or both hands to balance during descent, then the user can maintain an upright attitude, but this becomes difficult when the user has a backpack or other equipment
Solution Approach 1:
The attachment device serves as an intermediary between the belay tether and the support structure, providing a mechanical connection point that eliminates the need for the user to manually grasp the tether for balance. The device includes a second opening that allows the tether to pass through and be secured, creating a stable connection that works regardless of the user's equipment load
Solution Approach 2:
The attachment device introduces a spatial dimension to the connection system by positioning the first and second openings in different orientations. The first opening engages the support structure while the second opening engages the tether, creating a multi-dimensional connection that provides stability without requiring user hand engagement
3Productivity
If conventional devices are used for tethered descent, then the basic function of controlled descent is achieved, but the user has no way to slow or halt the descent as the belay device continues to feed out the tether
Solution Approach 1:
The attachment device incorporates a dynamic engagement mechanism where the biasing member can be actively engaged or disengaged. This allows the user to control the descent process by manipulating the engagement state of the device with the support structure, enabling the user to slow or halt descent as needed while the belay device continues to feed out tether
4Reliability
If two hands are required to make the necessary connection between the load and the structure, then the connection can be securely made, but this requires significant effort and dexterity in dangerous positions
Solution Approach 1:
The attachment device segments the connection function into distinct engagement points: the first opening for support structure engagement and the second opening for tether engagement. This segmentation allows each hand to perform a simple, dedicated action rather than requiring coordinated two-handed manipulation of a single complex connector
Solution Approach 2:
The biasing member provides automatic engagement and locking functionality, eliminating the need for continuous manual intervention to maintain connection security. Once the device is initially positioned, the biasing force automatically secures the connection, allowing one-handed operation while maintaining reliable connection security
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
Enables users to quickly and safely connect to supports, control their descent, and maintain a stable attitude with limited hand engagement, facilitating single-handed operation and quick disconnection in challenging environments.
Implementation Method 1
a biasing member operatively associated with the hooks for urging the hooks to rotate toward one another
Implementation Method 2
a brake member yieldably positioned adjacent the pulley
Data Source
AI summary
A user insertion system, that includes (a) a belay tether connectable to a support and configurable for descending a user; (b) an attachment device installable onto the support between the support and the belay tether; (c) a user braking device connectable between the belay tether and the user; and (d) a tip resistant system.