Recessed Threaded Wall Insert With Adhesive Retention
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Solution Overview
Problem
Existing hollow wall mounting devices, such as spring-loaded toggles and plastic split-tip screw inserts, cause damage to friable wall materials like gypsum board, loosen over time, and protrude beyond the wall surface, making repair difficult and compromising structural integrity.
Innovation Solution
A recessed cylindrical metal insert with adhesive channels and inner threads, equipped with O-rings to contain adhesive, is inserted into a hollow wall aperture, providing a secure mounting point without protruding components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spring-loaded bi-fold toggle devices are used to mount objects on hollow walls, then mounting capability is achieved, but the device degrades the wall material and requires retightening which can lead to failure
Solution Approach 1:
The patent introduces a resilient plug as an intermediary element between the toggle bolt and the wall material. This plug acts as a mediator that distributes the mounting forces over a larger area, preventing concentrated stress on the gypsum board while maintaining secure attachment. The plug absorbs and distributes the mechanical stress, eliminating the knife-like deformation caused by direct toggle contact.
Solution Approach 2:
The patent changes the physical parameters of the mounting interface by using a resilient, deformable plug material that can change shape under load. This material parameter change allows the mounting device to adapt to the wall material without causing degradation, transforming the rigid-toggle-to-friable-wall interaction into a compliant interface that preserves wall integrity.
2Object-affected harmful factors
If larger toggle devices are selected to decrease deformation tendency, then wall material damage is reduced, but wall openings become exceptionally large and difficult to repair
Solution Approach 1:
The patent applies local quality by concentrating the stress-distributing function in the resilient plug at the specific interface between mounting device and wall material. This localized solution allows the use of smaller toggle devices with standard-sized wall openings, while the plug locally manages the stress distribution to prevent deformation without requiring large repair areas.
3Reliability
If expanding shielded inserts are used to mount objects, then secure attachment is achieved, but the inner surfaces of wall material are degraded and the flange prevents surface restoration
Solution Approach 1:
The patent inverts the traditional approach by using a resilient plug that expands or deforms to fill the wall aperture, rather than using a rigid flanged insert that protrudes. The expansion action is reversed - instead of a flange pushing outward, the plug material itself deforms inward to fill the hole, eliminating the protruding flange problem while maintaining secure attachment through material deformation.
4Adaptability or versatility
If repeated loading and unloading occurs with shielded screw inserts, then mounting flexibility is maintained, but catastrophic dislodgement occurs due to degraded gypsum board
Solution Approach 1:
The patent applies beforehand cushioning by using the resilient plug material to absorb and distribute cyclic loading stresses before they can degrade the gypsum board. The plug acts as a cushioning element that protects the wall material from repeated stress cycles, preventing the progressive degradation that leads to catastrophic failure while maintaining mounting flexibility.
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 ensures secure and damage-free mounting, allowing easy wall restoration and preventing adhesive contamination, while maintaining structural integrity and facilitating easy repositioning of mounted objects.
Implementation Method 1
adhesively affixed cylindrical metal insert
Data Source
AI summary
A recessed object mounting device suitable for inserting into a prepared aperture of a hollow wall material, the device including a substantially cylindrical metal insert and a moisture curable adhesive. The metal insert includes a central bore equipped with tapped machine threads, and an external surface adapted with parallel channels to receive and retain an adhesive deposit. The device includes at least one O-ring installed within a distal external surface channel, the O-ring serving to control the location of an adhesive during curing. When pressed into a hollow wall aperture, the device serves as a base for threadably coupling a object mounting screw.