Dosing Device with Movable Piston for Adjustable Liquid Volume
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Solution Overview
Problem
Existing dosing devices for liquids are complex, require multiple parts, and are difficult to assemble, often clogging or requiring additional manipulations for dosing, especially when dealing with thick to thin viscosity liquids, and lack adjustable dosing capabilities.
Innovation Solution
A dosing device with a minimum number of parts, designed for easy assembly, featuring a cup and a movable dosing piston with an extension that forms a dosing control chamber, allowing for adjustable dosing by tilting or inverting the container or hose, enabling stepless adjustment of dosing quantity and continuous pouring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple parts and complex valve devices (balls, ball bearings) are used in dosing devices, then dosing function can be achieved, but device complexity and assembly difficulty increase significantly
Solution Approach 1:
The patent combines multiple dosing components into a single integrated dosing closure that can be placed directly on the nozzle. The dosing chamber integrates the valve function, metering function, and dispensing function into one unit, eliminating the need for separate ball valves, multiple chambers, and complex assembly structures.
Solution Approach 2:
The dosing closure serves multiple functions simultaneously: it acts as a valve to control liquid flow, a metering device to measure the dose, and a dispensing mechanism to release the liquid. This multi-functionality reduces the overall system complexity while maintaining reliable dosing performance.
2Quantity of substance
If dosing chamber diameter is made significantly larger than container nozzle, then dosing capacity increases, but device size and integration capability decrease
Solution Approach 1:
The dosing chamber is designed to nest directly on the container nozzle, with its diameter only slightly larger than the nozzle opening. This nested configuration allows the dosing chamber to be compact while still providing adequate dosing capacity, and enables easy placement and removal from the container.
3Measurement precision
If dosing requires additional manipulations (inverting container, pushing dosing chamber), then dosing precision can be improved, but ease of operation deteriorates and both hands are required
Solution Approach 1:
The dosing closure is designed to perform dosing automatically when placed on the nozzle. The valve mechanism opens automatically upon placement, allowing liquid to fill the dosing chamber, then closes automatically to seal the dose. This self-service mechanism eliminates the need for manual manipulation while maintaining precise dosing.
4Ease of manufacture
If dosing device is attached to outside of nozzle, then integration is simplified, but operational convenience and one-handed use become impossible
Solution Approach 1:
The dosing closure merges the dosing function with the nozzle interface, creating a single integrated component that replaces the original nozzle cap. This integration allows the device to be operated with one hand by simply placing it on the nozzle, while maintaining simple manufacturing and assembly processes.
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 device ensures reliable, foolproof dosing with minimal parts, preventing clogging and allowing easy use by tilting or inverting, with adjustable dosing from a minimum to a maximum quantity and continuous pouring capabilities.
Implementation Method 1
The dosing chamber can be moved axially into two end positions. When the container has fallen, ie when the nozzle is at the bottom, the dosing chamber is pushed up to its stop and is then filled.
Data Source
Figure 1
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Figure 4~5
AI summary
The metering device consists, for example, of a closure, having a closure body (1) with sealing closing means (7), which can be placed in a sealing manner on the connector. The metering means of the closure consist of just two components. There is first, seated securely in the closure body (1), a hollow cup (4) having, on the bottom side of the cup (4), a window (12) arranged in its side wall. The second component is a cap-shaped metering piston (10) having, on the upper side of the cap, a projection (5) which extends in the axial direction. This metering piston (10) with projection (5) fits into the cup (4), wherein its projection (5) covers and closes the window (12). The metering piston (10) is able to move axially in the cup (4) and its projection (5) is able to pivot to a limited degree toward the outer side of the window (12). In the pivoted-out state, it forms, together with the cup (4), an open valve which is otherwise closed.