Trigger Dispenser Pre-Stressing Valve Flexible Membrane Seal

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Solution Overview

Problem

Existing trigger dispensers with pre-stressing valves require tight manufacturing tolerances for optimal operation, which can be challenging and costly to achieve.

Innovation Solution

The trigger dispenser features a pre-stressing valve configuration with a head seal that forms a reliable and easy-to-implement seal, eliminating the need for strict manufacturing tolerances in the passage wall.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If tight manufacturing tolerances are used for the pre-stressing valve components, then the sealing reliability is improved, but the manufacturing complexity and cost increase

Engineering Contradiction:

Improvesealing reliabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs a flexible membrane as the sealing element in the pre-stressing valve. This membrane can deform elastically to create reliable sealing contact with the passage wall, eliminating the need for tight manufacturing tolerances on rigid components. The flexibility of the membrane allows it to conform to slight variations in the passage wall geometry while maintaining effective sealing.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent changes the material parameter from rigid to flexible by using an elastomeric membrane instead of rigid sealing components. This parameter change allows the sealing surface to adapt to manufacturing variations through elastic deformation, thereby maintaining sealing reliability without requiring precise dimensional control of the passage wall.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If tight manufacturing tolerances are applied to the passage wall, then the valve operation precision is improved, but the production cost increases

Engineering Contradiction:

Improvevalve operation precisionVSAvoidproduction cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The flexible membrane compensates for passage wall dimensional variations through its ability to deform, ensuring consistent valve operation precision without requiring the passage wall to be manufactured with tight tolerances. This reduces production costs while maintaining operational precision.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The membrane acts as a cushioning element that absorbs and compensates for manufacturing variations before they affect valve operation. By providing this preliminary compensation, the system ensures precise valve operation despite variations in passage wall dimensions.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

This configuration ensures effective sealing and operation of the pre-stressing valve, simplifying manufacturing and reducing costs while maintaining optimal performance.

Implementation Method 1

a membrane, in particular with a sealing ring, forming a seal with the head surface of the primary wall

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12337339B2Trigger dispensing device

Publication Date: 2025.06.24 GUALA DISPENSING SPA

AI summary

A trigger dispensing head applicable to a bottle suitable for containing a product to be dispensed is provided. The trigger dispensing head has valve elements having a dome-shaped valve body provided with an elastically deformable membrane. The elastically deformable membrane has an annular sealing ring that forms a head seal of a pre-stressing valve.