Airless Pump Nozzle Head with Ball Valve Support for Leakage Prevention
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Solution Overview
Problem
Conventional airless dispensing pump containers with nozzle heads face issues such as reverse flow, leakage, and uneven discharge of cosmetic contents, particularly with high viscosity or low viscosity liquids, due to lack of effective vacuum sealing and reverse flow prevention, leading to oxidation and decay.
Innovation Solution
An airless dispensing pump container with an airtight push down type nozzle head featuring a content discharge part, an efficient pump piston, and a ball valve support structure that automatically opens and closes the valve, preventing reverse flow and leakage, and ensuring uniform discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional nozzle head with open discharge hole is used, then the content can be discharged easily, but external air enters the container causing oxidation and decay
Solution Approach 1:
A valve member is introduced as an intermediary between the content and the external environment. This valve member includes a valve body with a discharge hole and a valve cap that closes the hole when not in use, allowing content discharge only when intentionally activated while preventing air ingress during storage
Solution Approach 2:
The patent creates a vacuum environment inside the container by removing air before filling with content. The valve mechanism maintains this vacuum state by preventing air entry, effectively creating an inert atmosphere that protects oxygen-sensitive cosmetic contents from oxidation
2Device complexity
If no reverse flow prevention structure is provided, then the device structure remains simple, but content leaks due to reverse flow particularly with low viscosity liquids
Solution Approach 1:
A ball valve is introduced as a mediator between the pump chamber and the discharge path. The ball valve automatically opens when content pressure pushes it during discharge, and closes when pressure equalizes or reverses, preventing backflow into the pump chamber without requiring complex mechanical structures
Solution Approach 2:
The ball valve operates automatically based on pressure differential alone. During content discharge, the pressure difference pushes the ball valve open; when discharge stops or reverses, the pressure equalizes and the ball valve closes automatically, providing self-regulating reverse flow prevention without external control
3Productivity
If the nozzle head is pressed to discharge content, then the content can be dispensed, but it is difficult to control the discharge amount to be fixed
Solution Approach 1:
The pump chamber is pre-filled with a specific volume of content before each discharge cycle. The piston moves down a predetermined distance to push this pre-measured content through the discharge path, ensuring a fixed discharge amount regardless of user pressing force or duration
4Reliability
If a plug type discharge valve is used, then the valve can open and close the nozzle hole, but large parts of the valve are exposed creating gaps that allow foreign substances or air to penetrate
Solution Approach 1:
The valve cap is nested inside the valve body, with the valve cap closing the discharge hole from the interior side. This nested configuration ensures that the sealing surface is fully contained within the valve structure, eliminating exposed portions where foreign substances or air could penetrate while maintaining reliable opening and closing function
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 solution effectively prevents external air and foreign substance ingress, ensuring the content is discharged in a fixed amount without oxidation or decay, maintaining the quality of high viscosity and low viscosity liquids by enhancing vacuum sealing and controlling the discharge direction.
Implementation Method 1
since an external air is not inputted into the content storing container after the content is discharged, it keeps a vacuum state all the time
Implementation Method 2
it returns to original state with the help of a return spring
Data Source
AI summary
An airless dispensing pump container with an airtight nozzle head of a push down type capable of discharging a fixed amount of content is disclosed, in which a vacuum sealing function is enhanced in the whole structure of the present invention, and a content opening and closing plate of a content opening and closing valve member in the construction of a content discharge part of a nozzle head is automatically opened and closed, along with a reliable discharge of the content, and a reverse flow and leakage are prevented by improving a structure of a content pump piston which sucks and transfers the content. When a pump cylinder is slanted at a certain angle along with the content storing container or in case of a content having high viscosity, it is possible to improve the operation errors of the ball valve by providing an inventive structure of the ball valve support installed at a lower side of the stem.