Liquid Sealant Dispenser Tip for Single-Handed Seam Application
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Solution Overview
Problem
Existing methods for applying liquid sealant require two hands and frequent ladder ascents/descents, compromising safety and efficiency.
Innovation Solution
A single-handed dispensing tip for caulking guns that allows for single-pass application of sealant at the correct thickness and width, featuring a rectilinear shape and guide tabs for controlled flow, with optional fin for centering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-handed caulking gun and squeegee method is used, then the sealant can be applied and spread, but the user loses three points of contact on the ladder and must frequently switch equipment
Solution Approach 1:
The dispensing tip merges the sealant dispensing function and the spreading function into a single integrated tool. The tip includes a dispensing end for applying sealant and a flattened portion with a spreading surface for spreading the sealant, allowing both functions to be performed with one hand while maintaining three points of contact on the ladder.
2Ease of operation
If the dispensing tip has a rounded cross-section, then sealant flows smoothly, but the user cannot press down to ensure proper attachment to the underlying surface
Solution Approach 1:
The dispensing tip transitions from a rounded cross-section at the attachment end to a flattened cross-section at the dispensing end. This asymmetric design allows the rounded portion to maintain smooth sealant flow while the flattened portion enables the user to press down firmly to ensure proper attachment to the underlying surface, with guide tabs maintaining consistent sealant thickness.
3Manufacturing precision
If the user applies sealant without guide controls, then application is faster, but the sealant thickness and width are inconsistent
Solution Approach 1:
The dispensing tip incorporates guide tabs and a flattened portion with specific dimensional characteristics at the dispensing end. These localized features provide reference surfaces that control sealant thickness and width without requiring complex external guidance systems. The guide tabs extend beyond the front edge to maintain correct thickness even when rolling the tip upward to terminate a sealant application run.
4Productivity
If the user must set down the caulking gun to pick up a squeegee, then separate functions are performed, but significant time and labor are lost switching equipment
Solution Approach 1:
The dispensing tip combines the dispensing function and spreading function into a single integrated component that attaches to the caulking gun. The flattened portion with its spreading surface allows the user to apply and spread sealant continuously without setting down the gun or switching to a separate squeegee tool, significantly improving application speed and productivity.
Data Source
AI summary
A dispensing tip or tool for use in dispensing a caulking or liquid sealant in conjunction with caulking guns or similar tools. The tip flattens in cross-section towards the dispensing end, with a rectilinear opening causing the liquid sealant to emerge at a specific thickness and width. A pair of guide tabs cause the sealant to emerge and be placed over a gap, seam or joint to be sealed. A fin extending from the bottom fits within the seam, gap or joint to help guide the tool during use. A notch in the bottom side of the opening allows for more sealant flow into the seam, gap or joint itself.