Modular Cement Finishing Tool with Deflector and Levels
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Solution Overview
Problem
Forming desired profile characteristics on uncured or partially cured cementitious surfaces, such as swimming pool walls, is challenging due to the need for precise shaping and maintaining consistent features like horizontal grooves and recesses, which requires specialized tools that are adaptable and effective.
Innovation Solution
A modular tool system with a structural frame, handles, blades, rollers, and levels that allows for adjustable orientation and attachment of various modules to form different shapes and features on vertical and horizontal surfaces, ensuring consistent and precise shaping of cementitious materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hand tools are used to shape cementitious surfaces, then some degree of shaping is possible, but manufacturing precision and consistency of features like horizontal grooves and recesses deteriorate due to periodic variation in surface contours
Solution Approach 1:
The patent applies parameter changes by incorporating levels (bubble levels or plumb lines) that provide real-time feedback on the tool's orientation parameters. This allows the operator to adjust and maintain precise horizontal and vertical orientations throughout the shaping process, ensuring consistent depth and positioning of grooves and recesses despite variations in surface contours
Solution Approach 2:
The patent implements feedback mechanisms through levels that continuously indicate whether the tool is properly oriented horizontally or vertically. This feedback loop enables the operator to make real-time corrections to maintain manufacturing precision of features like horizontal grooves, directly addressing the consistency problem
2Manufacturing precision
If specialized tools are designed to maintain constant height and depth of features, then manufacturing precision improves, but device complexity increases due to additional components needed for orientation control
Solution Approach 1:
The patent applies universality by designing a tool where the platform serves multiple functions: it supports the shaping element, provides a mounting surface for levels, and acts as the operational interface with the cementitious surface. This multi-functionality reduces overall device complexity while maintaining the ability to control orientation and achieve constant groove height
Solution Approach 2:
The patent uses segmentation by making the platform and shaping elements removable and replaceable. This allows the basic platform structure to remain simple while specialized shaping components can be attached as needed, reducing the complexity of any single tool configuration while maintaining manufacturing precision
3Shape
If vertical walls are shaped with horizontal grooves and recesses, then desired profile characteristics are achieved, but maintaining depth consistency of grooves deteriorates due to surface contour variations
Solution Approach 1:
The patent applies dynamics by allowing the platform to be adjusted and repositioned along the vertical wall surface while maintaining a fixed reference orientation through levels. This dynamic positioning capability enables the tool to accommodate variations in wall contour while keeping the groove depth consistent relative to the reference plane established by the level
Data Source
AI summary
A modular tool for imparting profile characteristics into fluent cementitious material. The tool has an elongated base forming a permanently fixed blade, and at least one handle. The blade is configured to act as a dovetail to which any of several modular blades may frictionally fit in removable fashion. The fixed blade forms a deflector disposed to deflect removed cementitious material away from the handles. Other blades may fit by peg and socket engagement. The tool may have detachable rollers enabling the tool to advance at a controlled elevation along a wall being formed and shaped. A slide block may be arranged to engage the rollers so as to adjust their position on the tool. The tool may have integral bubble levels.