Fluid Dispensing Head With Liner-Sealed Valve for Low-Residual Dosing
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Solution Overview
Problem
Existing dispensing devices require a large number of components and have a complex design, leading to high manufacturing costs and a propensity for failure, with incomplete fluid dispensing at low pressures and rapid closure causing residual fluid issues.
Innovation Solution
A simplified dispensing device design that eliminates the need for additional sealing elements by using a liner with a movable valve element that seals the dispensing opening through friction, allowing for a one-piece construction and controlled fluid flow through a liner channel and chamber arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional sealing elements and complex valve mechanisms are used to seal the dispensing opening, then the sealing reliability is improved, but the device complexity and manufacturing costs increase
Solution Approach 1:
The patent removes the complex valve mechanism and additional sealing elements from the dispensing device. Instead of using a valve element with cylinder and separate sealing components, the invention uses a simple liner that directly seals the dispensing opening through its structural design, eliminating unnecessary components while maintaining sealing functionality
Solution Approach 2:
The patent combines the sealing function and fluid containment function into a single liner component. The liner integrates both the sealing surface and the fluid channel, eliminating the need for separate sealing elements and valve mechanisms, thus simplifying the overall device structure
2Length of moving object
If a minimal stroke is used to open the dispensing opening, then the device compactness is improved, but the opening force required increases significantly
Solution Approach 1:
The patent employs a conical liner channel that tapers toward the dispensing opening. This conical geometry creates a progressive opening effect where the valve element encounters increasing resistance as it moves to the open position, allowing a minimal stroke to generate sufficient opening force through the geometric progression of the conical surface
3Speed
If the valve element closes the dispensing opening rapidly, then the closing speed is improved, but residual fluid remains in the nozzle chamber
Solution Approach 1:
The patent incorporates a conical liner channel that progressively opens the fluid path before the valve element fully closes. This preliminary opening action allows fluid to be drawn into the chamber and distributed evenly, preventing rapid closure from leaving residual fluid while maintaining controlled closing speed
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
Reduces component count and manufacturing costs while improving opening and closing properties, ensuring complete fluid dispensing and minimizing residual fluid accumulation, facilitating droplet-like delivery.
Implementation Method 1
the valve element seals the dispensing opening through friction
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The invention relates to a dispensing device (1) for dispensing a fluid, comprising a head base part (2) with a dispensing opening (15), a liner (10) arranged within the head base part (2), a liner channel (9) arranged between the head base part (2) and the liner (10), and a valve element (13) which is movably arranged at least partially within the liner (10) and interacts with the dispensing opening (15). The valve element (13) can be moved relative to the liner (10) from a first position to a second position by means of a stroke, wherein in the second position of the valve element (13) a fluid path is formed between the liner channel (9) and the dispensing opening (15), thus enabling fluid dispensing. With a small number of components, fluid dispensing in the first position of the valve element (13) is prevented by the liner (10) sealing the liner channel (9) against the dispensing opening (15).