Single-Piece Spray Head with Conical Pin for Fluid Dispensing

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Solution Overview

Problem

Existing spray heads for fluid dispenser devices require assembly of multiple parts, leading to performance variability, increased manufacturing and assembly costs, and complexity, while also complicating the creation of a consistent and reproducible spray profile.

Innovation Solution

A single-piece spray head design featuring a hollow cylindrical sleeve with a radial end wall and a conical or frustoconical central pin guiding fluid into non-radial and/or non-axial channels, eliminating the need for assembly and ensuring consistent performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If multiple parts are assembled to form the spray head, then the spray profile can be defined through cooperation between parts, but performance varies from one spray head to another and manufacturing cost increases

Engineering Contradiction:

Improvespray profile consistencyVSAvoidnumber of parts

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent merges multiple separate components (head body, nozzle, spray profile elements) into a single integrated spray head component. The spray profile is formed directly within the single-piece structure through strategically positioned non-radial channels and a central pin, eliminating the need for assembly between multiple parts and ensuring consistent performance across all units.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If multiple parts are assembled to form the spray head, then the spray profile can be defined through cooperation between parts, but manufacturing and assembly cost increases

Engineering Contradiction:

Improvespray profile definitionVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The spray head is manufactured as a single integrated component using injection molding or similar single-step manufacturing processes. The spray profile is defined by incorporating non-radial channels and a central pin directly into the mold cavity, eliminating the need for separate manufacturing and assembly steps for multiple components, thereby reducing overall manufacturing cost.

Inventive Principle:

Principle #5Merging (Combining)

3Manufacturing precision

If multiple parts are assembled to form the spray head, then the spray profile can be defined through cooperation between parts, but assembly complexity increases

Engineering Contradiction:

Improvespray profile creationVSAvoidassembly complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The spray head is designed as a single-piece component where the spray profile is created through the internal geometry of the molded part itself. Non-radial channels and a central pin are integrated directly into the head structure during manufacturing, eliminating the need for separate assembly steps and reducing assembly complexity to zero for the spray head itself.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of manufacture

If a single-piece design is used, then manufacturing and assembly cost is reduced and performance consistency is improved, but the ability to guide fluid precisely may be compromised

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidfluid guidance precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The single-piece spray head incorporates a central pin with a specifically designed conical or frustoconical surface at its internal end. This localized geometric feature precisely guides the fluid flow toward the non-radial channels, ensuring accurate fluid direction and spray profile consistency despite the simplified single-component construction.

Inventive Principle:

Principle #3Local quality

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

The single-piece design ensures consistent and reproducible fluid spraying, reduces manufacturing and assembly costs, and allows for efficient fluid dispensing without assembly-related performance variations, while also enabling both expulsion and suction modes without movable parts.

Implementation Method 1

the internal end of said central pin, arranged inside said hollow body, being of shape that is conical or frustoconical, so as to guide the fluid towards said at least one non-radial and/or non-axial channel

Methodology Applied

Scientific EffectFluid flow guidance through conical geometry:

Implementation Method 2

said spray profile comprising at least one channel that is non-radial and/or non-axial relative to said longitudinal axis

Methodology Applied

Scientific EffectFluid spray through non-radial channel geometry:

Data Source

PatentUS9433952B2Spray head for a device for dispensing a fluid product

Publication Date: 2016.09.06 APTAR FRANCE SAS

AI summary

A spray head for a fluid dispenser device, including a hollow body having a substantially cylindrical sleeve and extending along a longitudinal axis (A), a substantially radial end wall provided with a spray orifice; and a spray profile upstream from the spray orifice. The spray profile includes at least one channel that is non-radial and/or non-axial relative to the longitudinal axis (A). The head, the spray orifice, and the spray profile are made as a single piece, the spray profile including a central pin, the internal end of the central pin, arranged inside the hollow body, being of shape that is conical or frustoconical, so as to guide the fluid towards the at least one non-radial and/or non-axial channel, the internal end forming an outlet valve.