Trigger Dispensing Head With Integrated Valve for Uniform Dispensing
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Solution Overview
Problem
Current trigger dispensing devices face challenges in manufacturing and assembly processes due to the complexity of integrating suction and pre-compression valve means, which affects the uniformity and efficiency of product dispensing.
Innovation Solution
A trigger dispensing head with an integrated valve element that combines suction and pre-compression valve functions, featuring a flexible valve element with a cantilevered flap and annular membrane, allowing product flow only when pressure exceeds a threshold, and a rotatable sleeve for efficient assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If suction valve means and pre-compression valve means are integrated into a single valve element, then device complexity is reduced and assembly is facilitated, but manufacturing precision requirements increase
Solution Approach 1:
The patent integrates both suction valve means and pre-compression valve means into a single valve element (180). This merging of functions reduces the overall device complexity and simplifies the assembly process, as fewer separate components need to be manufactured and assembled. The single valve element design eliminates the need for multiple valve components and their associated mounting structures.
Solution Approach 2:
The valve element features locally optimized structures including a flexible diaphragm (183) with specific material properties and a nozzle (184) with precisely defined geometry. These local quality enhancements ensure that critical areas of the single valve element meet high precision requirements, compensating for the integrated design and maintaining overall manufacturing precision.
2Ease of manufacture
If a single valve element is used for both suction and pre-compression functions, then assembly process is simplified, but reliability of valve operation may deteriorate
Solution Approach 1:
Although the valve element is a single integrated component, it incorporates functionally segmented structures: a suction valve portion with flap (181) for suction control and a pre-compression valve portion with diaphragm (183) and nozzle (184) for pressure regulation. This internal segmentation allows each function to operate independently and reliably while being manufactured as one piece.
Solution Approach 2:
The patent employs different material parameters and structural parameters for different functional zones of the valve element. The flexible diaphragm uses elastomeric materials with specific durometer values, while the nozzle uses rigid materials with precise dimensional tolerances. These parameter variations ensure reliable operation of each valve function despite the integrated design.
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
Facilitates manufacturing and assembly by integrating valve functions into a single component, ensuring uniform dispensing and improved product distribution, while maintaining efficient operation and assembly processes.
Implementation Method 1
pre-compression valves, which allow the product to escape from the pressure chamber to the external environment only when the pressure in the pressure chamber exceeds a predefined threshold value
Implementation Method 2
suction valve means that allow product to be drawn from the suction duct into the pressure chamber
Data Source
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AI summary
A trigger dispensing head (4) of a trigger dispensing device (1) comprises a cylinder chamber (14), a piston (80), a pressure chamber (30a), a sleeve (30) having an end wall (36), a suction duct terminating in a suction mouth (18a), a dispensing duct, and valve means for regulating product flow. The valve means comprise a valve element (200) made in one piece comprising a tubular portion (202), a flexible flap (212), and an annular membrane (216).