Trigger Sprayer Dual Vacuum System Sustained Spray

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Solution Overview

Problem

Existing sustained duration sprayers are often bulkier, more complex, and costly compared to conventional sprayers, lacking the efficiency and aesthetics desired for continuous or longer duration sprays.

Innovation Solution

A trigger sprayer design incorporating two vacuum systems: one to fill a fluid chamber and another to facilitate fluid distribution, utilizing a piston and vacuum cylinder configuration to create a sustained duration spray with a compact and aesthetically pleasing structure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If conventional sustained duration sprayer designs are used to achieve continuous spray, then spray duration is improved, but device size and complexity increase

Engineering Contradiction:

Improvespray durationVSAvoidnumber of parts

Core Design Contradiction:

Duration of action of moving objectVSDevice complexity

Solution Approach 1:

The patent combines the vacuum generation function and fluid pressurization function into a single integrated piston-cylinder assembly. The piston moves within a sealed chamber to generate vacuum for fluid intake, then reverses to pressurize and eject fluid, eliminating the need for separate vacuum pump and pressurization mechanism that would increase part count.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The piston-cylinder assembly serves multiple functions: it generates vacuum during the intake stroke, stores pressurized fluid during the charging stroke, and acts as the pressurization mechanism during the spray stroke. This multi-functional component reduces overall device complexity while maintaining sustained duration spray capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Duration of action of moving object

If conventional sustained duration sprayer designs are used to achieve continuous spray, then spray duration is improved, but device size increases

Engineering Contradiction:

Improvespray durationVSAvoiddevice size

Core Design Contradiction:

Duration of action of moving objectVSVolume of moving object

Solution Approach 1:

The patent places the fluid cylinder and piston assembly within the existing trigger sprayer housing structure. The piston rod extends through the housing, and the cylinder is positioned to utilize the available internal space efficiently. This nesting approach allows sustained duration functionality without significantly increasing external device dimensions.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Duration of action of moving object

If conventional sustained duration sprayer designs are used to achieve continuous spray, then spray duration is improved, but manufacturing cost increases

Engineering Contradiction:

Improvespray durationVSAvoidproduction cost

Core Design Contradiction:

Duration of action of moving objectVSEase of manufacture

Solution Approach 1:

By combining vacuum generation and pressurization functions into a single piston-cylinder assembly, the patent reduces the total number of components that need to be manufactured, assembled, and quality-tested. This integration simplifies the manufacturing process and reduces assembly steps, thereby lowering production costs despite adding sustained duration functionality.

Inventive Principle:

Principle #5Merging (Combining)

4Duration of action of moving object

If conventional sustained duration sprayer designs are used to achieve continuous spray, then spray duration is improved, but aesthetic appeal decreases

Engineering Contradiction:

Improvespray durationVSAvoidaesthetic appeal

Core Design Contradiction:

Duration of action of moving objectVSShape

Solution Approach 1:

The patent integrates the piston-cylinder assembly within the existing trigger sprayer housing, maintaining the compact and familiar external form factor of conventional sprayers. The internal components are arranged to fit within the existing silhouette, preserving aesthetic appeal while providing sustained duration spray functionality.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 design enables a continuous and efficient sustained duration spray with reduced complexity and size, improving user experience and production costs while maintaining aesthetic appeal.

Implementation Method 1

movement of the piston in the fluid cylinder chamber produces a vacuum capable of drawing a fluid or product into the fluid cylinder chamber

Methodology Applied

Scientific EffectVacuum: Vacuum

Implementation Method 2

a second vacuum to facilitate movement of components of the sprayer to distribute the fluid from the fluid chamber

Methodology Applied

Scientific EffectVacuum: Vacuum

Data Source

PatentEP3503792B1Inline vacuum spring sustained duration sprayer

Publication Date: 2023.10.04 SILGAN DISPENSING SYSTEMS CORP

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Figure 2A

AI summary

A sustained duration trigger sprayer includes a first vacuum formed by piston movement in a fluid cylinder which fills the sprayer for delivery of a fluid and a second vacuum formed between a vacuum piston connected to the fluid cylinder and a vacuum cylinder acts on the sprayer to disperse product when a discharge valve is opened.