Pool Cover Track Decoupling for Binding Reduction
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Solution Overview
Problem
Conventional retractable pool cover systems experience binding issues due to drag, manufacturing imperfections, and twisting forces, leading to premature failure of the rope/slider attachment point.
Innovation Solution
A pool cover system with a tubular channel track, line attachment block, and cover attachment block configuration that decouples the line and cover attachment blocks, allowing smooth sliding and reducing binding by transferring motion without eccentric forces, using a tubular channel with a slot and retaining features to minimize wear and extend the life of the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pool cover system uses a single slider attached to both the pool cover and rope, then the system structure is simple, but binding occurs during extension due to drag, manufacturing imperfections, and twisting forces, leading to premature failure
Solution Approach 1:
The patent divides the single slider into two separate components: a line attachment block that moves independently on the track and a cover attachment block that is fixed to the pool cover. This segmentation eliminates the binding problem by allowing the line attachment block to move freely without the cover's drag and twisting forces, while the cover attachment block remains stable. The two blocks are connected through the line, creating a decoupled system that improves reliability without excessive complexity.
Solution Approach 2:
The line acts as an intermediary element between the line attachment block and the cover attachment block. By fixing the line to the line attachment block rather than directly to the cover, the system mediates the transfer of force while isolating the cover attachment from the binding forces that occur during track movement. This intermediary connection protects the attachment point from premature failure.
2Ease of manufacture
If the track has manufacturing imperfections or installation variances, then the track can be produced and installed more easily, but slider binding occurs during operation
Solution Approach 1:
By segmenting the attachment system into two separate blocks, the line attachment block can move independently to compensate for track imperfections. The cover attachment block remains stable while the line attachment block absorbs the variability in track dimensions and orientation, allowing smooth operation despite manufacturing tolerances.
Solution Approach 2:
The system changes the operational parameters by allowing the line attachment block to move with greater freedom along the track. This independent movement capability enables the system to adapt to variations in track geometry, maintaining smooth operation across different manufacturing quality levels.
3Device complexity
If the line attachment block is directly attached to the cover attachment block, then the structure is simpler, but twisting and eccentric forces cause binding and premature failure
Solution Approach 1:
The line serves as an intermediary that connects the line attachment block to the cover attachment block without direct mechanical attachment. This eliminates the transmission of twisting and eccentric forces from the track to the cover attachment, as the line can accommodate these forces through tension and flexion rather than rigid mechanical connection.
Solution Approach 2:
The patent extracts the line attachment function from the cover attachment block, placing it in a separate line attachment block that moves independently. This separation removes the cover attachment from the path of binding forces, taking out the problematic direct attachment and replacing it with an indirect connection through the line.
Data Source
AI summary
A pool cover system comprises a retractable pool cover, a track, a line, a line attachment block, and a cover attachment block. The line may be fixedly attached to the line attachment block. The line attachment block may be at least partially captured within the track. The cover attachment block may be at least partially captured within the track. The cover attachment block may be fixedly attached to a first lateral edge of the pool cover. The longitudinal edge of the cover attachment block may include a saddle configured to trap the line attachment block. The line attachment the line attachment block is free of attachment to the cover attachment block.