Flexible Arm Flooring Connector for Dimensional Change Compensation
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Solution Overview
Problem
Wood flooring materials experience dimensional changes due to their hydroscopic and anisotropic nature, leading to issues like crowning, gapping, and heaving, which existing fastening systems struggle to address effectively, especially with solid wood where directional weaknesses hinder the effectiveness of static connector systems.
Innovation Solution
A flooring system utilizing flexible arm connectors with a base and center mast that allows for elastic deflection to engage with angled retention grooves on flooring pieces, eliminating the need for adhesives or fasteners that penetrate the substrate, and enabling the use of different materials like solid hardwood and marble in a single floor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If static connector systems are used with wood flooring, then mechanical restraint is achieved, but dimensional changes cause loss of mechanical interference or press fit
Solution Approach 1:
The connector system transitions from static to dynamic by incorporating flexible arms that can deflect and move. The flexible arms are designed to move relative to the base, allowing the connector to adapt to dimensional changes in the flooring material while maintaining mechanical restraint. This dynamic capability preserves the mechanical interference effectiveness despite wood expansion and contraction.
Solution Approach 2:
The flexible arms change their physical state from rigid to flexible, allowing elastic deflection. This parameter change enables the connector to accommodate dimensional variations in the flooring material. The flexible arms can bend and flex within elastic limits, maintaining connection strength while adapting to the changing dimensions of the wood flooring.
2Stability of the object's composition
If fasteners and adhesives are used to bond flooring to substrate, then dimensional stability is achieved, but stress concentration occurs at fastener locations
Solution Approach 1:
The connector system divides the restraint function into multiple flexible arms distributed across the connector base. Instead of concentrating stress at single fastener points, the flexible arms are spaced apart and each independently engages with the flooring material, distributing the stress across multiple contact points and reducing stress concentration.
Solution Approach 2:
The flexible arms act as flexible elements that distribute stress. Rather than rigid fasteners creating stress concentrations, the flexible arms can bend and flex, distributing the dimensional change forces across their length and across multiple arms, thereby reducing peak stress at any single location.
3Reliability
If tongue and groove sections are formed into flooring planks, then floating floor compensation is achieved, but directional weaknesses in solid wood prevent success
Solution Approach 1:
The flexible arm connector acts as an intermediary between the flooring planks. Instead of relying on the wood's inherent directional strength to form tongue and groove joints, the flexible connector mediates the connection, allowing dimensional change compensation without requiring the wood to withstand high lateral stresses that would exploit its directional weaknesses.
Solution Approach 2:
The connector system changes the mechanical parameters of the joint by introducing flexibility. Rather than creating rigid tongue and groove joints that would stress the wood's grain structure, the flexible arms allow controlled movement and dimensional change while maintaining the floating floor compensation effect.
4Manufacturing precision
If precise matching between grooves and protrusions is required for static connectors, then manufacturing precision is improved, but adaptability to dimensional variation is reduced
Solution Approach 1:
The flexible arms provide dynamic adjustment capability that compensates for dimensional variations. While precise manufacturing of the connector components is still beneficial, the flexible arms can adapt to a range of dimensional variations in the flooring material, reducing the stringency of precision requirements compared to rigid static connectors.
Solution Approach 2:
The flexible arms change their geometric parameters (bend angle, deflection amount) to accommodate dimensional variations in the flooring. This parameter flexibility allows the connector to work with varying dimensions while maintaining effective mechanical engagement, reducing the need for extremely precise matching between all components.
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
This system distributes dimensional changes, reduces stress effects, allows for easy installation and replacement of flooring pieces, and eliminates the need for specialized equipment and training, while maintaining the finish of the flooring components.
Implementation Method 1
The contacting portions are sized to create a spacing between each flexible arm and the support surface, thereby permitting each flexible arm to elastically deflect toward the support surface when pressure is exerted on a flooring piece
Data Source
AI summary
A flooring system includes a plurality of individual flooring pieces, such as floor panels, each having a wear surface, an opposing mounting surface and a retention groove disposed within the mounting surface. A floor panel connector used to interconnect at least two of the floor panels has a base, at least one mast extending from an upper surface of the base and a pair of flexible arms. Each flexible arm extends transversely from opposing sides of the at least one mast and has an extending end. Contacting portions extending from a lower surface of the base are configured to engage the support surface and create a spacing between each flexible arm and the support surface to permit each flexible arm to elastically deflect toward the support surface when pressure is exerted on a floor panel. This deflection enables the extending end of each flexible arm to engage the retention groove of a corresponding floor panel.