Molded Aircraft Spreader Reduces Weight and Drag

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Solution Overview

Problem

Traditional aircraft spreading systems face issues with weight, material distribution patterns, and maintenance due to sheet metal construction, hinged doors causing drag and turbulence, and restrictive seeder plates, leading to uneven coverage and costly repairs.

Innovation Solution

A molded plastic spreader with a throat assembly, fan assembly, and detachable components that reduce weight, prevent material buildup, allow for adjustable spread patterns, and facilitate easy maintenance, featuring a sliding door gatebox with quick-release mechanisms and adjustable vanes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If sheet metal spreaders are used, then structural strength is improved, but weight increases

Engineering Contradiction:

Improvestructural strengthVSAvoidspreader weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The patent changes the material parameter from sheet metal to molded plastic, fundamentally altering the weight-to-strength ratio. The molded plastic construction achieves sufficient structural strength for spreader application while reducing weight significantly, directly resolving the contradiction between strength and weight.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs molded plastic as a composite material solution, integrating multiple functions (structural support, material containment, aerodynamic shaping) into a unified plastic construction that balances strength requirements with weight reduction goals.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If hinged doors are used in gatebox, then material flow control is improved, but aerodynamic performance deteriorates due to drag and turbulence

Engineering Contradiction:

Improvematerial flow controlVSAvoidaerodynamic drag and turbulence

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent inverts the traditional hinged door mechanism by using a molded plastic construction with integrated flow control features. Instead of mechanical hinges that create drag, the design uses aerodynamic shaping and internal baffles molded into the plastic structure to control material flow, eliminating the harmful aerodynamic effects while maintaining operational control.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the mechanical hinged door system with a molded plastic aerodynamic structure. The flow control function previously achieved through mechanical hinges is now accomplished through aerodynamic shaping and internal flow guides integrated into the plastic construction, substituting mechanical operation with aerodynamic principles.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If sheet metal spreaders are used, then structural integrity is improved, but maintenance and repair costs increase

Engineering Contradiction:

Improvestructural integrityVSAvoidmaintenance and repair costs

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The patent changes the material parameter from sheet metal to molded plastic, which fundamentally alters the maintenance and repair characteristics. Molded plastic is more resistant to corrosion, fatigue, and impact damage, reducing maintenance frequency and costs while maintaining sufficient structural integrity for the application.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The molded plastic spreader design allows for more economical replacement rather than repair. When wear or damage occurs, the entire spreader can be replaced as a low-cost molded component, eliminating the need for expensive metal fabrication and welding operations required for sheet metal spreaders.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

4Ease of manufacture

If fixed spreader design is used, then manufacturing simplicity is improved, but adaptability to different spread patterns deteriorates

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidspread pattern adaptability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent segments the spreader design into modular components within the molded plastic construction, allowing different vane configurations and spread pattern attachments to be integrated or exchanged. This segmentation enables a single base molded structure to support multiple spread patterns through interchangeable elements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent incorporates adjustable and movable elements within the molded plastic spreader design, allowing the spread pattern to be dynamically changed. Features such as adjustable vanes or reconfigurable internal structures enable the spreader to adapt to different operational requirements while maintaining the simplicity of a molded construction.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9266612B2Molded spreader for an aircraft gatebox

Publication Date: 2016.02.23 TEXAS TRANSLAND LLC

AI summary

A spreader for an aircraft comprises a throat assembly operable to couple to a gatebox, the throat assembly comprising an air intake portion operable to direct airflow into the spreader, a material intake portion operable to receive material released from a gatebox, a fan assembly comprising a plurality of vanes that divide the fan assembly into a plurality of compartments, wherein the vanes are comprised of molded material, and a connection mechanism operable to couple the fan assembly to the throat assembly.