Welted Textile Orthosis Segmented Ribbed Top
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Solution Overview
Problem
Conventional venous support and elastic venous compression orthoses with ribbed tops suffer from discomfort and poor blood circulation due to rolling and high pressure, which are exacerbated by the use of special-purpose knitting machines that limit the production of fine textures.
Innovation Solution
An orthosis design featuring a ribbed top with an intermediate part and a welt, where the welt is less than 1.5 cm high, separating the functions of preventing rolling and position retention, allowing manufacture on conventional circular knitting machines with gauges greater than 20, and optimizing yarn and stitch patterns for comfort and aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional ribbed top with a welt is used to prevent rolling, then the orthosis maintains its position, but the pressure discontinuity causes discomfort and poor blood circulation
Solution Approach 1:
The ribbed top is segmented into three distinct parts: a first part with high elasticity for position retention, a second intermediate part with medium elasticity for pressure transition, and a third part with low elasticity for comfort. This segmentation allows each part to perform its specific function while ensuring smooth pressure distribution across the boundary region.
Solution Approach 2:
Different regions of the ribbed top are assigned different elastic properties tailored to their specific functions. The first part has high elasticity for strong retention, the second part has medium elasticity for gradual pressure transition, and the third part has low elasticity for comfort. This local differentiation of material properties resolves the contradiction between position retention and comfort.
2Object-affected harmful factors
If a weltless ribbed top is used to eliminate pressure discontinuity, then comfort is improved, but the ribbed top rolls over on itself creating discomfort and poor circulation
Solution Approach 1:
The ribbed top is divided into multiple functional segments with different elastic properties. The first part provides the necessary retention force to prevent rolling, while the second and third parts ensure smooth pressure distribution. This segmentation allows the structure to maintain stability without requiring a traditional welt.
Solution Approach 2:
The first part of the ribbed top is designed with high elasticity specifically to prevent rolling, while the second and third parts have reduced elasticity to ensure comfort and pressure continuity. This localized differentiation of elastic properties allows the structure to prevent rolling without creating pressure discontinuities.
3Stability of the object's composition
If special-purpose double bed knitting machines are used to manufacture weltless ribbed tops, then rolling is prevented, but fine-textured orthoses cannot be produced
Solution Approach 1:
The invention enables conventional single bed knitting machines to produce ribbed tops with multiple functional zones that were previously only achievable on specialized double bed machines. By using standard jacquard techniques and yarn selection, the same rolling-prevention functionality is achieved on equipment that can also produce fine textures.
Solution Approach 2:
The invention changes the approach from structural complexity (double bed machines) to material and process parameters (yarn elasticity, jacquard patterns, knitting tension) to achieve rolling prevention. This allows conventional machines operating at high gauges to produce fine-textured orthoses with the desired stability.
4Manufacturing precision
If a high gauge knitting machine is used to produce fine texture, then aesthetic appearance is improved, but the ribbed top structure becomes unstable and rolls over
Solution Approach 1:
The first part of the ribbed top is designed with high elasticity and specific stitch patterns to provide structural stability and prevent rolling, while the second and third parts maintain the fine texture characteristics. This local differentiation allows the structure to remain stable despite the overall fine gauge construction.
Solution Approach 2:
The ribbed top is segmented into functional zones where the first part provides structural support and rolling prevention, while the second and third parts provide fine texture and comfort. This segmentation allows fine-gauge knitting to maintain both aesthetic appearance and structural stability.
Data Source
AI summary
An orthosis chosen from a venous support orthosis and an elastic venous compression orthosis, the orthosis including a ribbed top and a leg part, the ribbed top including an intermediate part extending the leg part, the stitch being different on each side of the boundary separating the leg part and the intermediate part, a welt extending the intermediate part and of a height less than 1.5 cm.