Payload Retrieval Guide With Tether Retaining Walls for Snagging Prevention
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Solution Overview
Problem
Existing uncrewed vehicles face challenges in efficiently retrieving payloads from a location without human intervention, particularly in ensuring the tether does not get caught during the retrieval process, which can increase power consumption and complicate the operation.
Innovation Solution
A payload retrieval system with a retriever guide that includes a channel and tether slot, featuring upward retaining walls to guide the tether and payload retriever, ensuring it remains oriented vertically, reducing the likelihood of snagging and minimizing power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tether is allowed to move freely during payload retrieval, then the retrieval operation is simpler, but the tether may get caught or entangled increasing power consumption
Solution Approach 1:
The patent introduces a tether guide as an intermediary component between the tether and the payload retriever. This guide constrains the tether's movement path, preventing entanglement while maintaining simple retrieval operation. The tether guide acts as a mediator that directs the tether through a controlled trajectory, eliminating the need for complex active control systems.
Solution Approach 2:
The patent extracts the tether constraint function from the main retrieval mechanism by implementing a separate tether guide structure. This allows the retrieval operation to remain simple while the tether guidance is handled by a dedicated component that prevents entanglement without adding complexity to the core retrieval system.
2Reliability
If tether retaining walls are added to guide the tether vertically, then tether entanglement is reduced, but device complexity increases
Solution Approach 1:
The patent segments the tether guide into distinct functional elements: retaining walls positioned at specific locations along the retrieval path. These walls are divided into first and second retaining walls that work together to constrain the tether. By segmenting the guidance function into discrete structural elements rather than a continuous complex mechanism, the design achieves reliable tether control with minimal added complexity.
Solution Approach 2:
Instead of using an active control system to prevent tether entanglement, the patent inverts the approach by using passive structural constraints (retaining walls) to guide the tether. This passive guidance structure allows the tether to follow a predetermined vertical path without requiring active intervention, reducing overall system complexity while improving reliability.
3Ease of operation
If the payload retriever is directed through a channel with retaining walls, then vertical orientation is maintained reducing snagging, but manufacturing complexity increases
Solution Approach 1:
The patent merges the channel structure and retaining walls into an integrated retriever guide assembly. By combining the guidance channel with the retaining wall structures, the design achieves effective payload retriever direction and vertical orientation maintenance without requiring separate manufacturing steps for each component. This integration simplifies the manufacturing process while maintaining the functional benefits of structured guidance.
Data Source
AI summary
A payload retrieval system includes a support structure and a retriever guide coupled to the support structure. The retriever guide includes a body that forms a channel having an inlet end and an exit end and a tether slot that provides access to the channel. The retriever guide is adapted to receive, at the inlet end of the channel, a payload retriever secured to a tether and to direct the payload retriever to the exit end of the channel while the tether pulls the payload retriever through the retriever guide. The retriever guide also includes a first retaining wall extending upward from the body of the retriever guide along a first side of the tether slot and a second retaining wall extending upward from the body of the retriever guide along a second side of the tether slot. The payload retrieval system also includes a payload holder disposed at the exit end of the channel.