Expandable Anchor for Hollow Wall Weight-Bearing Repair
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Solution Overview
Problem
Hollow-wall constructions, such as those using drywall or wallboard, are prone to damage from fixtures and objects, and existing repair methods often fail to securely reattach weight-bearing fixtures while providing a cosmetic finish.
Innovation Solution
An expandable apparatus with a one-way valve is inserted into a wall cavity, expanded using a pump, filled with anchoring material, and covered with a filler material to create a secure anchor point for load-bearing fixtures and a smooth surface for finishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a pre-fabricated patch is affixed to the panel material, then the cosmetic appearance is improved, but the ability to reattach weight-bearing fixtures is lost
Solution Approach 1:
The patent embeds an expandable anchor device within the wall cavity behind the patch. The anchor expands to engage the hollow wall structure, creating a hidden strengthening element that supports weight-bearing fixtures while the patch maintains cosmetic appearance. This nesting approach combines both aesthetic and structural functions.
Solution Approach 2:
The solution combines multiple materials and components: the pre-fabricated patch for cosmetic repair, the expandable anchor device for structural support, and adhesive materials for bonding. This composite approach allows the repair to simultaneously achieve both aesthetic restoration and weight-bearing capability.
2Strength
If the wall cavity is accessed to install anchors, then the structural integrity is improved, but the complexity of the repair process increases
Solution Approach 1:
The repair system is divided into separate modular components: the patch applied to the surface, the expandable anchor device inserted into the cavity, and the connection mechanism between them. This segmentation allows each component to be installed independently through simple access, avoiding complex wall disassembly while ensuring structural integrity.
Solution Approach 2:
The expandable anchor device is self-installing through expansion within the existing wall cavity. Once inserted through the opening, the anchor expands to engage the hollow wall structure without requiring additional access or complex installation procedures, thereby maintaining structural integrity while minimizing repair complexity.
3Shape
If the opening is completely filled with material, then the cosmetic appearance is improved, but the ability to secure anchors is reduced
Solution Approach 1:
The anchor device is nested within the wall cavity behind the filling material. The expandable anchor engages the hollow wall structure from the interior, while the patch and filling material are applied to the front surface. This nested configuration allows both cosmetic filling and anchor securing to coexist without interference.
Solution Approach 2:
The solution separates the cosmetic function (front surface filling) from the structural function (interior anchor engagement) by operating in different spatial dimensions. The anchor expands in the depth dimension within the cavity, while the patch and filler address the surface dimension, allowing both requirements to be satisfied simultaneously.
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 provides a durable anchor for weight-bearing fixtures and a cosmetically acceptable repair by expanding within the wall cavity, securing the anchor material, and applying a filler to match the surrounding surface.
Implementation Method 1
expanding the unexpanded expandable apparatus
Implementation Method 2
following curing of the anchoring material
Data Source
AI summary
A method of repairing an opening in a wall includes positioning an unexpanded expandable apparatus within a cavity of a wall, aligning an anchor receiving cavity of the unexpanded expandable apparatus with the opening in the wall, and while maintaining the anchor receiving cavity in general alignment with the opening in the wall, expanding the unexpanded expandable apparatus. Following expanding the expandable apparatus, the method includes filling the anchor receiving cavity with an anchoring material, and covering the anchoring material and filling the opening with a filling material to repair the opening in the wall to allow a weight bearing fixture to be attached or reattached to the repaired area.