Tow-Behind Spoils Rake and Cage Roller for One-Pass Ground Prep

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Solution Overview

Problem

Existing spoils sifting and ground surface preparation technologies require multiple passes and multiple tools to achieve desired results, leading to inefficiencies and increased complexity.

Innovation Solution

A self-propelled, zero-turn radius work machine equipped with a tow-behind attachment featuring adjustable ground-engaging rakes and rollers that create a grid-type or waffled elevation pattern on the ground surface, allowing for simultaneous spoils sifting and surface preparation with minimized compaction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional spoils sifting and ground surface preparation methods are used, then the desired ground surface preparation and spoils sifting state can be achieved, but multiple passes and multiple distinct tools are required, leading to increased time consumption and operational complexity

Engineering Contradiction:

Improveground surface preparation efficiencyVSAvoidnumber of passes required

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent combines multiple distinct tools (spoils rake and ground engagement elements) into a single integrated attachment that performs both spoils sifting and ground surface preparation simultaneously. This merging of functions allows the system to achieve desired results in one pass rather than requiring multiple separate operations, directly resolving the technical contradiction between productivity improvement and time loss reduction

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The attachment is designed with multi-functional capabilities, where the same structure performs both spoils sifting and ground surface preparation tasks. The ground-engaging elements serve dual purposes by both moving spoils and preparing the ground surface, eliminating the need for multiple specialized tools and reducing the number of passes required

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple distinct tools are used for spoils sifting and ground surface preparation, then comprehensive ground treatment can be achieved, but device complexity and operational complexity increase

Engineering Contradiction:

Improveground treatment capabilityVSAvoidnumber of distinct tools

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple distinct tools into a single integrated attachment assembly that includes both spoils sifting components and ground engagement components. This consolidation maintains comprehensive ground treatment capability while reducing device complexity by eliminating the need for multiple separate tools and attachments

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The attachment design incorporates universal multi-functionality where a single device structure performs multiple ground treatment functions simultaneously. The ground-engaging elements are designed to both sift spoils and prepare ground surface in one operational pass, reducing the number of distinct tools needed while maintaining adaptability

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of manufacture

If traditional ground preparation methods are used, then ground surface can be prepared, but soil compaction increases, reducing soil aeration and increasing erosion risk

Engineering Contradiction:

Improveground surface preparation qualityVSAvoidsoil compaction

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by designing ground-engaging elements with specific configurations (such as tines or rakes with particular spacing and angles) that locally aerate the soil while preparing the surface. This localized approach allows ground preparation to occur without excessive compaction, as the elements create channels and pores in the soil rather than compressing it uniformly

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of using heavy compacting mechanisms that press soil down, the patent inverts the approach by using lifting and loosening elements that pull soil upward and create air pockets. This inverted method prepares the ground surface while simultaneously reducing compaction and enhancing aeration

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS12557719B1Spoils sifting and ground surface preparation apparatuses and systems

Publication Date: 2026.02.24 ABI ATTACHMENTS INC

AI summary

A work machine includes a chassis and a lift mechanism. A tow-behind attachment is positioned rearward of the work machine and includes a frame assembly, a spoils rake assembly, and a cage roller assembly. The frame assembly includes a forward portion and a rearward portion. The forward portion is coupled with the chassis and the lift mechanism. The rearward portion is coupled with and moveable to a plurality of positions relative to the forward portion independent of movement of the forward portion relative to the chassis. The spoils rake assembly is coupled with and extends downward from the rearward portion at a position forward of the cage roller assembly and is moveable vertically relative to the rearward portion. The cage roller assembly is coupled with and extends downward from the rearward portion of the frame assembly at a location rearward of the spoils rake assembly.