Plastic-Spring Pump Dispenser for Precise, Recyclable Dosing
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Solution Overview
Problem
Existing pump dispensers face issues with separate disposal due to metal springs and valve balls, and the dispenser extension moving with the head often causes liquid to miss the target and contaminate surrounding areas.
Innovation Solution
A pump dispenser with a plastic spring composed of multiple rings connected by webs and a plastic valve disc, allowing for easy recycling and preventing the dispenser opening from moving with the head, while ensuring even liquid delivery and adjustable dosing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal springs and valve balls are used in the pump dispenser, then the dispensing function is reliable, but the disposal becomes difficult and complex
Solution Approach 1:
The invention uses plastic springs and plastic valve discs instead of metal components, creating a homogeneous material composition throughout the pump dispenser. This allows the entire device to be processed together in recycling facilities designed for plastic, eliminating the need for separate metal component removal and enabling unified disposal with the container.
2Ease of operation
If the dispenser extension moves with the pump head, then the pump mechanism functions properly, but liquid application precision deteriorates
Solution Approach 1:
The invention separates the dispenser opening from the pump head, creating two independent functional elements. The pump head moves to deliver liquid while the dispenser opening remains stationary on the container, allowing the liquid to be deposited at a fixed location rather than moving with the pump mechanism.
3Device complexity
If a single valve disc is used, then the device complexity is reduced, but the liquid delivery control becomes insufficient
Solution Approach 1:
The invention divides the valve function into two separate plastic valve discs: one valve disc controls liquid intake into the pump chamber while the other controls liquid discharge. This segmentation allows independent optimization of intake and discharge control, ensuring reliable liquid delivery through dedicated valve mechanisms for each direction.
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 easy recycling, precise liquid application, and adjustable dosing without contamination, enhancing user-friendliness and functionality.
Implementation Method 1
The spring is made of plastic and has a plurality of rings arranged one above the other, which are each connected to one another by at least one first connecting web. This design of the spring allows the rings and ring segments to bend and the spring to be compressed by an axial force and to return to its basic position when the force is removed
Implementation Method 2
The second valve disc closes a vent provided on the adapter and releases the vent when liquid is drawn into the dosing chamber. This prevents a vacuum from building up in the container, allowing the liquid to be pumped evenly by pressing down the pump head
Data Source
Figure 1
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AI summary
The invention relates to a pump dispenser (11) for a metered removal of a liquid from a container (13) on which the pump dispenser (11) can be placed, having a housing (15) which can be placed on the container (13) and in which a metering chamber (23) is formed, a rising tube (27) which is connected to the metering chamber (23), and a pump head (29) which can be moved up and down relative to the housing (15) along the longitudinal axis (31) of the dispenser (11) between a first and second position in order to carry out a pump stroke (57). The pump dispenser (11) additionally has a piston (33) which is secured to the pump head (29) and can be moved in the metering chamber (23) in order to convey the liquid, a dispenser opening (37) which is connected to the metering chamber (23) and through which metered liquid can leave the pump dispenser (11), a spring (35) which resets the pump head (29) relative to the housing (15), and a valve (41) which defines the conveying direction of the liquid from the rising tube (27) into the dispenser opening (37) and which blocks a conveying process in the opposite direction. The spring (35) is made of plastic and has a plurality of rings (45) which are arranged one over the other and which are connected together by at least one first and second respective connecting web (51a, 51b).