Wheeled Scraper Blade with Pull Handle for Leveling

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Solution Overview

Problem

Existing tools for smoothing large areas of loose surfaces like sand or gravel are inefficient and require excessive manual effort, as they either lack the necessary leverage or mobility to effectively distribute material uniformly.

Innovation Solution

A device comprising wheels, a handle, an angled arm, and a blade that allows for easy pulling and adjustment of depth, leveraging human power to smooth surfaces by pivoting on an axle, thereby distributing material efficiently across a wide area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional manual tools are used to smooth large areas of loose surfaces, then the device can be simple in structure, but the manual effort required becomes excessive and efficiency is low

Engineering Contradiction:
Improvesmoothing efficiencyVSAvoidmanual effort
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The device divides the smoothing function into two independent parts: a blade for cutting material and wheels for mobility. This segmentation allows the blade to effectively process material while the wheels handle transport, improving overall efficiency without increasing operational complexity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The device incorporates movable wheels that allow dynamic adjustment of position and depth. The wheels enable the device to be rolled across surfaces and adjusted to different heights, providing adaptability to various terrain conditions while reducing manual lifting effort

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If the device uses wheels for mobility, then transport becomes easy, but the device complexity increases

Engineering Contradiction:
ImprovemobilityVSAvoidstructure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The device merges the blade assembly with the wheel assembly into a single integrated structure. The blade is mounted on a frame that is directly attached to the wheels, combining cutting and mobility functions in one unit rather than requiring separate tools

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The device performs multiple functions with a single structure: the wheels provide both mobility and support for the blade assembly, while the frame serves as both the mounting structure and the depth adjustment mechanism. This multi-functionality reduces overall device complexity

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If the blade is fixed in position, then the structure is simple, but the ability to adjust cutting depth is limited

Engineering Contradiction:
Improvedepth adjustmentVSAvoidmechanism
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The blade assembly is made dynamically adjustable through the wheel mechanism. The user can roll the device to different heights and positions, allowing the blade to cut at varying depths without requiring a complex adjustable mechanism

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The wheels act as intermediaries between the user and the blade depth adjustment. Instead of requiring direct manual adjustment of the blade position, the user simply rolls the device to the desired height, and the wheels mediate this depth change automatically

Inventive Principle:
Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables quick and effortless smoothing of large areas with reduced manual effort, allowing for deeper or shallower cuts depending on handle position, and facilitates easy transport and storage.

Implementation Method 1

The Scraper is pulled across the surface on the wheels 3

Methodology Applied
Scientific EffectRolling: Roller

Implementation Method 2

The wheels 3 are designed to allow the Scraper as referenced in FIG. 3 to be rolled across the surface

Methodology Applied
Scientific EffectFriction: Friction

Implementation Method 3

The blade 7 is configured to rest along a horizontal plane, and to rest upon the surface upon which the Scraper as referenced in FIG. 3 sits

Methodology Applied
Scientific EffectMechanical Force: Mechanical Force

Implementation Method 4

Because the handle 4 and arm 5 act as a lever, pivoting on the axle 8, raising and lowering the handle 4 lifts and lowers the blade 7

Methodology Applied
Scientific EffectLever: Lever

Implementation Method 5

The handle 4 and arm 5 act as a lever, pivoting on the axle 8

Methodology Applied
Scientific EffectMechanical Advantage: Mechanical Advantage

Data Source

PatentUS8832973B2Scraper blade on wheels with a pull handle for leveling dirt
Publication Date: 2014.09.16 GALLACCI JEFRY STUART
  • US8832973B2 patent drawing
  • US8832973B2 patent drawing
  • US8832973B2 patent drawing

AI summary

A devise which is a blade which is connected to two wheels, one at either end of the blade. A handle is also connected to the blade which is a person uses to pull the device across the surface of material to be moved. The device can be used to move material such as dirt or sand in a manner which allows easy leveling of the material.