Raised Wall Hopper Seal for Fertilizer Spreader

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Solution Overview

Problem

Existing hopper designs for fertilizer spreading machines face challenges in maintaining a sealed structure, particularly at the edges, due to manufacturing tolerances and limitations, leading to material loss and environmental damage.

Innovation Solution

A raised wall configuration for hoppers featuring panels with longitudinal flanges that are interrupted at the seal application zone, where a resilient seal with a channel design is applied to close the gap and ensure a tight connection between panels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If raised walls are joined by bolted fixings to enlarge hopper capacity, then adaptability and ease of modification are improved, but sealing reliability deteriorates due to manufacturing tolerances creating openings at edges

Engineering Contradiction:

Improvehopper capacity adjustmentVSAvoidsealing reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A seal element is introduced as an intermediary component between adjacent panels to bridge the gap created by manufacturing tolerances. The seal comprises a resilient body with a channel that receives the protruding portion of one panel and the recess of the adjacent panel, preventing material leakage while allowing the bolted assembly to maintain adaptability for capacity adjustments.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If silicone is used to seal junctions, then sealing reliability is improved, but durability and aesthetic effect worsen as silicone becomes dirty, changes colour and detaches over time

Engineering Contradiction:

Improvesealing reliabilityVSAvoidseal durability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

Instead of using silicone coating, the invention employs a resilient seal body that functions as a flexible sealing element. This seal comprises a resilient body with a channel that mechanically interlocks with the panel structures, providing durable sealing that resists detachment and maintains integrity over time while being resistant to environmental degradation.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The seal combines a resilient body material with a structured channel design, creating a composite sealing system that integrates both sealing function and structural engagement. This composite approach allows the seal to maintain reliability while achieving improved durability compared to pure silicone applications.

Inventive Principle:

Principle #40Composite materials

3Reliability

If corner pieces are constructed from plastics material, then sealing reliability is improved, but structural strength deteriorates as plastics can break due to ageing, and investment costs increase for mould construction

Engineering Contradiction:

Improvesealing reliabilityVSAvoidstructural strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

Inventive Principle:

Principle #40Composite materials

4Reliability

If panels are welded to construct hoppers, then sealing reliability is improved, but device complexity and manufacturing cost increase due to need for precise configuration planning and welding operations

Engineering Contradiction:

Improvesealing reliabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The hopper structure is divided into modular panels that can be independently manufactured and then assembled using bolted fixings. The seal element is designed as a separate component that fits between panels, allowing for simplified manufacturing of individual parts and easier assembly/disassembly compared to welded construction, while maintaining sealing reliability.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP4307875B1Raised wall for hoppers, in particular for fertilizer spreading machines and hopper obtained in this manner

Publication Date: 2025.01.29 MASCHIO GASPARDO

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Figure 5~6

AI summary

Raised wall (6) for hoppers (1), in particular for fertilizer spreading machines, comprising at least one panel (7) with at least a first end (7a) and a second end (7b) which are arranged for mutual connection to corresponding ends (7b, 7a) of at least one adjacent panel (7). The raised wall (6) further comprises a seal (13; 17) which is provided to be applied between adjacent panels (7) in the region of the connection zone. The panel (7) comprises a plugging surface (8) which is provided with longitudinal edges (9) which are configured to be joined in a superimposed manner on an adjacent edge (9), the longitudinal edges (9) are interrupted in the region of the application zone of the seal (13; 17) where the panel (7) is continued by the single plugging surface (8). The seal (13; 17) comprises a first surface (18) which is intended to be in abutment with the plugging surface (8) from the exterior of the hopper (1), a second surface (19) which is intended to be in abutment with the plugging surface (8) from the interior of the hopper (1), a bridge (20) between the first surface (18) and second surface (19) delimiting a channel (21) between the surfaces (18, 19) in which there is received the plugging surface (8) of at least one of the adjacent panels (7) for recovering and blocking the gap (12) generated by the interruption of the edges (9).