Magnetic Marker Arm Retention for Agricultural Planters

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Solution Overview

Problem

Agricultural planter marker arms often unfold undesirably during movements, leading to potential damage to the planter and surrounding structures.

Innovation Solution

Incorporation of retention devices with flexible mounts and magnetic elements to securely hold the marker arms in their stored positions, preventing unintended unfolding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the outer marker arms are allowed to swing freely in the stored position, then the marker arms can be easily folded and stored, but the marker arms may undesirably unfold and cause damage to structures or themselves

Engineering Contradiction:

Improveease of folding and storing marker armsVSAvoidstability of marker arms in stored position

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces traditional mechanical retention mechanisms (such as pins, clips, or latches) with a magnetic field-based retention system. Magnets embedded in the toolbar provide a holding force that keeps the marker arms in their stored position without requiring complex mechanical engagement devices, thus maintaining ease of operation while improving reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic field acts as an intermediary force between the toolbar and the marker arms. Instead of direct mechanical contact and engagement, the magnetic field provides a continuous retentive force that prevents unwanted unfolding while allowing the arms to remain freely positionable when needed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If retention devices are added to secure the marker arms in stored positions, then the marker arms will not undesirably unfold, but the device complexity increases

Engineering Contradiction:

Improvestability of marker arms in stored positionVSAvoidcomplexity of retention mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

By substituting mechanical retention systems with magnetic fields, the patent reduces device complexity. The magnets can be embedded directly into the toolbar structure, eliminating the need for separate mechanical retention components such as pins, springs, or latches, thereby maintaining reliability while minimizing added complexity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic retention system serves multiple functions: it provides retentive force to hold the marker arms in position, and the flexible mount with bumper provides impact absorption. This multi-functionality reduces the need for separate dedicated components for each function, thereby reducing overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If traditional mechanical retention mechanisms are used, then the marker arms can be secured, but the impact during unintended movement may cause damage

Engineering Contradiction:

Improvesecuring of marker arms in stored positionVSAvoidimpact damage from unintended unfolding

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent incorporates a bumper as part of the retention device assembly that is positioned to absorb impacts if the marker arms inadvertently unfold. This cushioning element is pre-positioned to mitigate the harmful effects of impact, protecting both the marker arms and surrounding structures from damage while the magnetic field provides the primary retention function.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The flexible mount acts as an intermediary between the magnetic retention system and the hard structures. It provides a compliant connection that can absorb and dissipate impact energy through deformation, reducing the transmission of shock forces to the marker arms and surrounding structures during unintended movement events.

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

Prevents damage by maintaining marker arms in their stored positions during planter movements, ensuring operational safety and reducing potential harm to equipment and external structures.

Implementation Method 1

a magnetic element mounted to the flexible mount... The magnetic element magnetically retains the outer arm

Methodology Applied

Scientific EffectMagnetic retention force: Magnetism

Implementation Method 2

the flexible mount dampens the impact of the outer arm acting upon the magnetic element

Methodology Applied

Scientific EffectImpact damping: Damping

Data Source

PatentUS10609855B2Magnetic marker arm retention

Publication Date: 2020.04.07 BLUE LEAF I P INC

AI summary

An implement for an agricultural vehicle including a toolbar and a pair of marking devices pivotally connected to the toolbar. Each marking device includes at least one arm configured for pivoting between a stored position and an operational position, and a retention device supported by the toolbar and configured for providing a magnetic retention force which magnetically retains the at least one arm in the stored position.