Concrete Floor Trowel Tool With Quick Coupling

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Solution Overview

Problem

Existing concrete floor treatment tools face issues such as discoloration, inconvenient manufacturing and transportation of plastic trowel pans, laborious replacement due to screw contact with the floor, and complex assembly of diamond pads, leading to uneven wear and breakage.

Innovation Solution

A tool with a quick coupling mechanism using guide channels and locking projections allows for easy installation and removal from trowel blades, enabling rapid replacement and use with varying blade lengths, and incorporates removable diamond abrading arrangements for consistent surface finishing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If plastic trowel pans with fixed attachment brackets are used, then discoloration of the floor surface is avoided, but manufacturing cost increases and transportation becomes inconvenient

Engineering Contradiction:

Improvediscoloration of floor surfaceVSAvoidmanufacturing cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The trowel pan is divided into a reusable body and a replaceable insert. The insert contains the attachment bracket and can be separated from the trowel pan body, allowing the pan to be reused while replacing only the worn insert. This segmentation resolves the contradiction by maintaining the plastic material benefit (no discoloration) while reducing manufacturing cost and improving transportation efficiency through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The insert is designed to nest within the trowel pan body, with the attachment bracket positioned inside the pan structure. This nesting arrangement allows compact stacking during transportation and storage, addressing the transportation inconvenience caused by fixed brackets while maintaining the plastic construction benefits.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Object-affected harmful factors

If plastic trowel pans with fixed brackets are used, then discoloration is avoided, but transportation space efficiency decreases

Engineering Contradiction:

Improvediscoloration of floor surfaceVSAvoidtransportation space

Core Design Contradiction:

Object-affected harmful factorsVSVolume of moving object

Solution Approach 1:

By separating the trowel pan into modular components (body and insert), the system allows for compact nesting and stacking during transportation. Only the essential insert needs to be transported with each pan, significantly reducing the volume occupied during logistics while maintaining the plastic construction that prevents discoloration.

Inventive Principle:

Principle #1Segmentation

3Strength

If screw fastening is used to attach trowel pans to blades, then secure attachment is achieved, but replacement becomes highly laborious when screw heads wear

Engineering Contradiction:

Improveattachment strengthVSAvoidreplacement difficulty

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The attachment system is segmented into a reusable trowel pan body and a replaceable insert containing the fastening mechanism. When wear occurs, only the insert needs replacement rather than the entire pan assembly, dramatically reducing repair labor while maintaining secure attachment through the preserved pan body.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The design allows discarding only the worn insert component while recovering and reusing the main trowel pan body. This selective replacement strategy reduces labor costs and material waste compared to replacing entire screw-fastened assemblies, while the insert maintains secure attachment functionality.

Inventive Principle:

Principle #34Discarding and recovering

4Object-generated harmful factors

If diamond pads are attached using Velcro to trowel pans, then abrasive functionality is achieved, but reliable attachment requires very careful cleaning of surfaces

Engineering Contradiction:

Improveabrasive functionalityVSAvoidattachment preparation

Core Design Contradiction:

Object-generated harmful factorsVSEase of operation

Solution Approach 1:

The diamond abrasive function is segmented into removable diamond pads that attach to the insert rather than directly to the trowel pan. This segmentation isolates the cleaning requirement to small, manageable pad surfaces rather than large pan surfaces, making preparation easier while maintaining effective abrasive functionality.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12448791B2Tool for the mechanical treatment of a concrete floor

Publication Date: 2025.10.21 CONCRIA OY

AI summary

A tool for the mechanical treatment of a concrete floor, such as for power trowel floating and finishing with blades, for conducting the treatment with a hand-operated, walk-behind or ride-on actuator, such as e.g. with a concrete power trowel, a floor treating apparatus, or the like. The actuator includes one or more operating heads, which include several, such as four, attachment arms perpendicular to each other, for treating a concrete floor with tools coupled in a removable manner into the engagement with each attachment arm. A tool is intended for use in engagement with a trowel floating blade coupled to an attachment arm of the actuator's operating head, whereby the tool with a substantially flat and elongated body includes first and second elements for its coupling and locking on a quick coupling principle for im-movable engagement with the trowel floating blade.