Trigger Head Venting Valve for Upside-Down Leak Prevention
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Solution Overview
Problem
Existing trigger dispensing devices often malfunction when used in an upside-down position, leading to product leakage through the venting passage, and are complex to produce and assemble.
Innovation Solution
A trigger dispensing head design with a simplified structure that includes a multifunction valve mechanism using a single ball shutter to prevent liquid leakage when inverted, featuring a venting tube offset from the vertical axis and a multifunction chamber to manage airflow and liquid flow independently in both upright and upside-down configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional trigger dispensing device is used in an upside-down position, then the device can reach hard-to-reach areas, but product leakage occurs through the venting passage
Solution Approach 1:
The venting passage is segmented into two separate passages: a first venting passage for air flow and a second venting passage for liquid flow. This segmentation allows independent control of air and liquid pathways, preventing liquid leakage through the air venting passage during upside-down operation while maintaining proper ventilation function.
Solution Approach 2:
A valve mechanism acts as an intermediary between the bottle compartment and the venting passages. The valve selectively opens and closes the first and second venting passages based on the device orientation, allowing air to flow during normal operation while preventing liquid from leaking through the venting system during upside-down operation.
2Reliability
If existing solutions for upside-down operation are implemented, then leakage is prevented, but device complexity increases
Solution Approach 1:
Multiple functions are merged into a single integrated valve mechanism that controls both the first venting passage and the second venting passage. The valve simultaneously performs air venting during normal operation and liquid sealing during upside-down operation, eliminating the need for separate components for each function and reducing overall device complexity.
Solution Approach 2:
The valve mechanism is designed as a multifunctional component that adapts its function based on device orientation. It serves as an air vent during normal operation, a liquid seal during upside-down operation, and automatically transitions between these functions, reducing the need for orientation-specific components and simplifying the overall device structure.
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
Enables smooth operation in both upright and upside-down positions with minimal liquid leakage, reducing component complexity and assembly requirements while maintaining functionality.
Implementation Method 1
When the device is used upside down, i.e., with the bottle applied above the head, the ball closes the first venting passage, thus preventing leakage
Implementation Method 2
When the device is used in the normal position, the ball closes the second venting passage and opens the first venting passage
Data Source
AI summary
A trigger head for a dispensing device for a liquid product that is usable an “upright” configuration and an “upside down” configuration has an attachment having an attachment suction chamber, a multifunction chamber and an auxiliary passage. The trigger head has multifunction valves operating in the multifunction chamber, which, in the “upright” configuration, close a communication between the multifunction chamber and a bottle compartment of a bottle of the dispensing device and, in the “upside down” configuration, close a communication between a multifunction passage of the multifunction chamber and a venting conduit of the trigger head.