Elongated Trowel Blade Flexing Control via Weighted Connector
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Solution Overview
Problem
Existing long handle trowels lack effective mechanisms to limit blade flexing during use, which affects the efficient spreading of adhesives and similar materials.
Innovation Solution
A trowel design featuring an elongated handle with a pair of adjacent weights that secure and restrain the blades, with a second blade of lesser height to limit flexing and additional features like downwardly projecting extensions or multi-piece blades for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade is made longer to increase spreading coverage, then the spreading efficiency is improved, but the blade flexing increases reducing control precision
Solution Approach 1:
The blade is divided into multiple segments (first blade portion, second blade portion, third blade portion) connected by articulation points. This segmentation allows the blade to maintain a longer overall length for increased spreading coverage while the segments can articulate to control flexing, thereby maintaining control precision despite the increased length.
2Adaptability or versatility
If the blade is made more flexible to adapt to surface variations, then the adaptability is improved, but the blade flexing becomes uncontrolled reducing spreading precision
Solution Approach 1:
The blade incorporates dynamic articulation points that allow controlled movement and flexibility to adapt to surface variations. The weights positioned on the blade create a balancing effect that limits excessive flexing, enabling the blade to be adaptable to different surface conditions while maintaining controlled flexing for precise spreading.
3Productivity
If weights are added to the blade to increase downward force on adhesive, then the spreading effectiveness is improved, but the blade securement becomes difficult reducing stability
Solution Approach 1:
The weights are integrated into the blade structure itself rather than being separate attachments. The blade includes weight portions that are formed as part of the blade assembly, and the weights are positioned to provide downward force on the adhesive while the blade securement mechanism maintains stable attachment. This merging ensures both spreading effectiveness and securement stability are achieved simultaneously.
Data Source
AI summary
Several embodiments of trowels which have an elongated handle and a pair of generally facing weights or a weight or weights and a connector between which a pair of blades are secured with one blade being of lesser height than the other to thereby resist undesired flexing of the other blade. In another embodiment, in lieu of having a second blade, a second weight which is disposed on the opposite side of the blade from the handle, has a downward extension which limits flexing of the blade. In a further embodiment, a blade is a two component blade and has a detachable and replaceable cutting edge. The weights and connector serve a multiple purpose of securing the upper end of the blades therebetween, facilitating downward pressure when the trowel is in use and in some embodiments through either a second blade or an extension of a weight for limiting the amount of flexing of the blade.