Valve Filling Head With Radial Sealing and Ejector Control
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Solution Overview
Problem
Existing filling heads for fluid product dispensing devices with metering valves suffer from variability in valve position during filling, leading to seal deformation and potential valve malfunctions due to stress exertion, which complicates the filling process and increases manufacturing and assembly costs.
Innovation Solution
A filling head design featuring a control member with dynamic and static seals, an ejector system, and a receiving space that minimizes contact zones with the valve, ensuring precise control over valve position and reducing stress on the valve body by applying pressure only to the radially external parts of the fixing element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is located on the upper axial edge of the valve to ensure sealing during filling, then sealing reliability is improved, but variability in valve position increases due to seal compression
Solution Approach 1:
The patent moves the seal from an axial position (upper axial edge) to a radial position (external lateral side wall). This dimensional change allows the seal to contact the valve in a different orientation, eliminating the compression-induced position variability while maintaining sealing effectiveness during the filling operation.
2Stability of the object's composition
If the filling head exerts stress on the valve body to secure the valve during filling, then valve stability is improved, but valve body deformation may occur causing malfunctions
Solution Approach 1:
The patent applies stress locally to the radially external parts of the fixing element rather than distributing stress across the entire valve body. The seal contacts only the external lateral side wall, and the ejector acts only on the fixing element, leaving the valve body's metering chamber and internal structures free from deforming stresses that could cause malfunctions.
Solution Approach 2:
The patent separates the functions of different components: the seal handles sealing, the ejector handles positioning and ejection, and the filling head handles fluid delivery. This segmentation allows each component to perform its function without imposing unwanted stresses on the valve body, maintaining both stability and functionality.
3Measurement precision
If the valve spring is tightly wound to define the fully actuated position, then dose dispensing precision is improved, but variability in bottom dead center position increases during filling
Solution Approach 1:
The patent introduces the ejector as an intermediary component that actively controls the valve's position during filling. The ejector pushes the fixing element to precisely position the valve at the desired bottom dead center location, independent of spring tension variations. This intermediary mechanism decouples the dose dispensing precision (maintained by spring tension) from the filling position precision (controlled by the ejector).
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 stabilizes the valve position during filling, reduces seal variability, and protects the valve body from stress, enhancing filling reliability and simplifying assembly while maintaining operational efficiency.
Implementation Method 1
a first spring disposed between said support ring and said body
Implementation Method 2
a second spring disposed between said ejector sleeve and said upper plate and urging said at least one ejector towards its ejection position
Implementation Method 3
a third sealing gasket between said receiving plate and said valve, said third gasket cooperating with an external side wall of said valve
Implementation Method 4
said control member comprising a filling channel through which, in the filling position, the pressurized fluid product is supplied to said valve to fill said tank
Data Source
Figure 1~2
Figure 3~6
Figure 7
AI summary
The invention relates to a filling head for a device having a valve (100) comprising a valve shutter (120), said head having: - a body (50) having a receiving space (55), - a control member (10) that slides in the body (50) between rest and filling positions, said member (10) having a channel (15) that opens into the receiving space (55), - a ring (30) that is fixed to the member (10) and cooperates with a spring (7) disposed between the ring (30) and the body (50), and - a plate (70) that is fixed to the body (50) and has a housing (71) for receiving the valve (100), such that, in the filling position, the valve shutter (120) opens into the receiving space (55), wherein, in the filling position, the receiving space (55) is sealed off, having a first seal (4) between the control member (10) and the body (50), a second seal (5) between the body (50) and the receiving plate (70), and a third seal (6) between the receiving plate (70) and the valve shutter (120), said third seal (6) cooperating with an external lateral wall of the valve shutter (120).