Expandable Sleeve Segments for Paint Roller Retention
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Solution Overview
Problem
Existing paint roller cover supports fail to securely retain roller covers without slippage, especially when they have non-rigid cores or are coreless, as they lack sufficient gripping force during use.
Innovation Solution
The design incorporates circumferentially spaced semi-cylindrical sleeve segments with elastomeric material and cam surfaces that expand radially to engage the roller cover, providing frictional retention and stability through a cage assembly with guide rails and elastomeric rings, ensuring secure attachment regardless of core rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple roller cover support design is used, then ease of manufacture and device simplicity are improved, but the ability to securely retain roller covers without slippage deteriorates
Solution Approach 1:
The support structure is divided into multiple discrete sleeve segments that can independently expand and contract. Each segment acts as an individual gripping element that can be manufactured separately and then assembled, maintaining manufacturing simplicity while achieving reliable retention through the collective action of multiple segments
Solution Approach 2:
The sleeve segments transition from a static design to a dynamic one, capable of radial expansion and contraction. This dynamic capability allows the support to adapt its gripping force to match the roller cover characteristics, providing secure retention for both rigid and coreless rollers while maintaining ease of manufacture through the modular segment design
2Stability of the object's composition
If a rigid support structure is used, then structural stability is improved, but the ability to accommodate both rigid and coreless roller covers deteriorates
Solution Approach 1:
The support structure incorporates radially movable sleeve segments that can dynamically adjust their diameter to match different roller cover types. This dynamic adaptation allows the same stable structure to securely hold both rigid and coreless roller covers by varying the expansion degree of the sleeve segments
Solution Approach 2:
The sleeve segments change their dimensional parameter (radial dimension) to adapt to different roller cover characteristics. By varying the radial position of the sleeve segments, the support can accommodate different roller cover types while maintaining overall structural stability
3Force
If elastomeric material is added to sleeve segments, then gripping force and frictional engagement are improved, but device complexity increases
Solution Approach 1:
The sleeve segments combine rigid structural material with elastomeric material to create a composite component. The rigid portion provides structural stability while the elastomeric portion provides enhanced gripping force and frictional engagement. This composite approach achieves improved retention without significantly increasing device complexity, as the elastomeric material is integrated into the existing sleeve segment structure
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
The solution effectively retains roller covers in place on the support, preventing slippage and paint migration, and accommodates both rigid and coreless roller covers by providing a firm frictional contact, enhancing user convenience and performance.
Implementation Method 1
elastomeric material attached to radial outer surfaces of each of the sleeve segments is pressed into frictional engagement with the inner diameter of a surrounding roller cover
Data Source
AI summary
Paint roller cover support includes a cage assembly mounted for rotation and limited axial movement in opposite directions on the shaft portion of a roller frame. The cage assembly includes a plurality of circumferentially spaced axially extending semi-cylindrical sleeve segments that move radially outward and inward relative to the shaft portion during axial movement of the cage assembly in opposite directions. Elastomeric rings surrounding opposite ends of the sleeve segments maintain cam members on the sleeve segments in engagement with cam lifters on respective hub members on the shaft portion. Both the elastomeric rings and elastomeric material attached to radial outer surfaces of the sleeve segments may be pressed into frictional engagement with the inner diameter of a surrounding roller cover during radial outward movement of the sleeve segments for securely retaining the roller cover on the support.