Lawn Perforating Tool with Rotating Curved Plates

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Solution Overview

Problem

Existing tools fail to efficiently prepare damaged lawn areas for reseeding by producing optimized non-uniform perforations with sufficient seed-to-soil contact while minimizing operator fatigue.

Innovation Solution

A lawn perforating tool with intersecting, non-planar wheel-like perforating plates that rotate about a working head axle, featuring angled radial arms for creating holes of controlled depth and spacing, and an adjustable handle with ergonomic grips for reduced fatigue, optionally powered by a tractor or small engine.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional hand tools are used to loosen and cut garden soil, then soil preparation can be achieved, but the tools cannot produce optimized non-uniform perforations with controlled depth and spacing

Engineering Contradiction:

Improveperforation depth and spacing controlVSAvoidefficiency of lawn preparation

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent employs wheel-like perforating plates with curved radial arms that rotate about a central axle. The curved geometry of the plates and arms enables them to penetrate soil at controlled angles and depths while creating non-uniform spacing patterns, directly achieving precise perforation control through curved mechanical design

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The perforating plates are designed to rotate freely about the working head axle during operation. This dynamic rotation allows the angled radial arms to adapt their positioning as they penetrate the soil, creating varied hole spacing patterns while maintaining controlled depth, thereby resolving the contradiction between precision and efficiency

Inventive Principle:

Principle #15Dynamics

2Shape

If uniform spacing between holes is maintained, then structural regularity is achieved, but the resulting grass pattern becomes visually objectionable

Engineering Contradiction:

Improveuniformity of hole patternVSAvoidvisual objectionability of grass pattern

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent deliberately creates non-uniform spacing between perforations through the asymmetric arrangement and rotation of the radial arms on the wheel-like plates. The asymmetric positioning of arms at different angles and the dynamic rotation during soil penetration ensure that holes are spaced irregularly, preventing uniform grass patterns while maintaining acceptable structural regularity

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The invention transitions from two-dimensional uniform grid patterns to three-dimensional spatial distribution by utilizing the rotation of perforating plates about a central axle. This adds a temporal and spatial dimension to hole placement, creating non-uniform patterns that are visually appealing while maintaining functional integrity

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of operation

If manual operation of the perforating tool is used, then operator control is maintained, but operator fatigue and muscle strain occur

Engineering Contradiction:

Improveoperator control and ergonomicsVSAvoidwork efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The tool incorporates a telescoping handle system that allows dynamic adjustment of the handle length to suit different operator heights and preferences. This ergonomic adaptation reduces fatigue during extended manual operation while maintaining full operator control over the perforating process

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The perforating tool is designed to be compatible with both manual operation and power equipment attachment. The universal design allows the same working head to be used with either manual handling or powered assistance, enabling operators to choose the mode that best suits their needs and minimizing fatigue while maintaining productivity

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Productivity

If powered implements such as tractor or small engine are used, then productivity is increased, but operator control and maneuverability are reduced

Engineering Contradiction:

Improvework efficiencyVSAvoidmaneuverability and control

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The tool is segmented into a separate working head assembly that can be attached to or removed from powered implements. This modular design allows the perforating mechanism to be powered by a tractor or small engine for high-productivity operations, while also enabling manual operation when precision and maneuverability are more important, thus resolving the contradiction between productivity and ease of operation

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8033341B2Lawn perforating tool and method of using same

Publication Date: 2011.10.11 ENROOT PROD LLC

AI summary

Disclosed herein is a lawn perforating tool and method of using same to prepare new lawn or garden areas or distressed regions of existing lawns or gardens for the planting of seed, example of which include, but are not limited to, grass seed, clover seed, wildflower seed, and the like. The lawn perforating tool of the present invention is particularly configured to provide in the soil and dead grass holes or indentations of a size, shape, and depth that is optimal for receiving and germinating new grass seed and of a density and distribution suitable to provide the resulting grass with a visually desirable pattern, rendering new growth indistinguishable from old growth.