Segmented-Aperture Lanyard With Prusik Chocking Adjustment
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Solution Overview
Problem
Conventional lanyards are not adjustable and lack a chocking feature, posing safety risks and limiting their use as an anchor or rescue device.
Innovation Solution
A lanyard design featuring a main rope with adjustable apertures and a prusik that can be positioned along the rope for secure attachment around a tree, providing additional safety and allowing use as a false crotch for descent or rescue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lanyards are used, then the structure is simple, but the safety and adjustability are insufficient
Solution Approach 1:
The lanyard is divided into multiple segments: a main rope portion, a prusik knot section, and an aperture section. This segmentation allows each component to perform its specific function - the main rope provides the primary anchor, the prusik provides friction-based securing, and the aperture allows for adjustment and alternative attachment points, thereby enhancing overall safety without making the entire structure overly complex.
Solution Approach 2:
The prusik knot is nested within the aperture section of the lanyard, with the prusik wrapping around the main rope and securing through the aperture. This nested configuration allows the lanyard to provide multiple layers of protection - if one attachment point fails, the nested prusik-knot-aperture system provides alternative securing mechanisms, improving reliability while maintaining a compact structure.
2Adaptability or versatility
If conventional lanyards are used, then the device is simple, but it lacks adjustability and chocking feature
Solution Approach 1:
The lanyard incorporates dynamic elements through the aperture section that can be adjusted along the main rope. The aperture allows the lanyard to adapt to different tree sizes and positions, and the prusik knot can be repositioned to provide chocking action at different locations. This dynamic adjustability enables the same lanyard structure to serve multiple functions - from simple anchoring to chocking features - without requiring multiple separate devices.
3Reliability
If conventional lanyards are used, then the structure is straightforward, but it cannot provide extra layer of safety if one side is damaged
Solution Approach 1:
The lanyard is designed with redundant safety features built in from the beginning. The aperture section and prusik knot are positioned to provide alternative attachment points before any damage occurs. If one side of the lanyard is cut or damaged, the intact prusik-knot-aperture system provides a pre-prepared backup mechanism that maintains safety without requiring complex emergency procedures or additional equipment.
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
Enhances user safety by ensuring secure attachment even if one side is cut or damaged, and allows versatile use as an anchor or rescue device.
Implementation Method 1
a prusik that can be positioned along the rope for secure attachment around a tree
Data Source
AI summary
A lanyard comprising a rope with segmented apertures and a prusik. The prusik can be attached to one of the apertures to help a user stay attached to the tree or pole.