Injection Washer Structure for Unblocked Anchor Adhesive Flow
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Solution Overview
Problem
Users often mistakenly believe they have filled the gap between a threaded rod and an object with adhesive using injection washers, when in fact the adhesive flow is blocked, leading to a false impression of improved stability in anchor systems, which can have dangerous consequences.
Innovation Solution
The injection washer is designed with a dual-body structure featuring aligned annularly extending surfaces and gaps, ensuring that adhesive can flow even if the threaded rod abuts one surface, allowing complete filling of the gap between the rod and the object, with optional features like alignment fingers for proper positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the injection washer channel abuts against the threaded rod to position the washer, then the washer is properly positioned, but the adhesive flow is blocked and users falsely believe the gap is filled
Solution Approach 1:
The injection washer is divided into a first body portion and a second body portion with aligned gaps between them. This segmentation allows adhesive to flow through multiple paths (through the gaps) rather than a single blocked channel, ensuring that users can actually fill the gap between the threaded rod and object while maintaining proper washer positioning.
2Device complexity
If a single-channel injection washer is used, then the structure is simple, but adhesive flow can be blocked giving false feedback to users
Solution Approach 1:
The injection washer incorporates localized gaps in specific regions of both body portions, creating multiple adhesive flow paths. This local modification maintains overall structural simplicity while providing reliable visual feedback to users about gap filling status, as adhesive can exit through the gaps when the gap between the threaded rod and object is properly filled.
Data Source
AI summary
An injection washer for an anchor system having a rod portion fixed to a surface, the injection washer including first and second opening portions arranged relative to each other along an axis parallel with the rod portion in use and which together define an opening through which the rod portion extends in use, the first opening portion having a smaller width than the second opening portion in a direction perpendicular to the rod portion and wherein a gap extends through a side of the injection washer into each of the first and second opening portions.