Polymeric Chain Links with Varying Thickness for Force Transmission
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Solution Overview
Problem
Existing chains with polymeric multifilament yarn links have reduced efficiency due to only partial contribution of yarns in transmitting forces between links, leading to suboptimal performance in cargo handling and securing applications.
Innovation Solution
A chain design where adjacent links have varying thicknesses, with a ratio of thickness to first links of at least 1.2, preferably up to 50, to enhance efficiency, and the use of stronger polymeric multifilament yarns and materials like UHMWPE, thermoplastic or thermosetting resin compositions, and metals for increased breaking strength and weight per unit length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If links have uniform thickness, then manufacturing is simpler, but efficiency is reduced because only part of the yarns contribute effectively to transmitting forces
Solution Approach 1:
The patent applies local quality by varying the thickness of links at specific locations. The first links have a first thickness and the second links have a second thickness that is different from the first thickness. This non-uniform thickness distribution optimizes the contribution of yarns to force transmission, thereby improving chain efficiency while maintaining manufacturing feasibility through defined geometric parameters.
2Strength
If link thickness is increased, then breaking strength is improved, but weight increases
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness parameters of different links. By setting specific thickness values for first links (t1) and second links (t2) with t2 ≠ t1, the design achieves enhanced breaking strength through improved force distribution while controlling overall chain weight. The alternating pattern of different thicknesses allows for strength optimization without proportional weight increase.
3Productivity
If non-uniform link thickness is used, then efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the chain into alternating first links and second links with different thickness characteristics. This segmentation creates a periodic structure where t1 and t2 alternate along the chain, optimizing efficiency through differentiated link geometries while maintaining a regular, manufacturable pattern that limits complexity through repetition.
Data Source
AI summary
The present invention relates to a chain comprising a plurality of first links (100) interconnected with a plurality of adjacent links, the first links comprising polymeric multifilament yarns (110) and having a thickness (Formula (I)), at least at the portion where they interconnect with the adjacent links wherein said adjacent links have a thickness (Formula (II)) at least at the portion where they interconnect with the first links and wherein the ratio (Formula (II)/Formula (I)) is at least 1.2. The invention further relates to the use of the chain for storing, securing, and handling cargo, e.g. in lifting, hauling and rigging.