Plastic Spring Pump Dispenser With Fixed Nozzle Metering
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Solution Overview
Problem
Existing pump dispensers are difficult to disassemble and recycle, and the dispenser extension moving with the head often results in liquid missing its target and contaminating surroundings due to the use of metal springs and balls.
Innovation Solution
A pump dispenser with a plastic spring composed of interconnected rings and valve disks made of plastic, allowing for axial compression and return, with the dispenser opening fixed on the housing to prevent movement and contamination, enabling efficient metering and recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal spring and valve balls are used in the pump dispenser, then the valve function and return mechanism work reliably, but the dispenser becomes difficult to disassemble and recycle
Solution Approach 1:
The invention extracts the metal components (spring and valve balls) from the pump dispenser and replaces them with plastic components that can be easily disassembled and recycled. The valve function is achieved through a valve disk made of plastic material that can be easily removed and disposed of with the container, eliminating the need for complex disassembly of metal parts.
Solution Approach 2:
The invention changes the material parameter from metal to plastic for both the spring and valve components. The plastic spring is made from elastomeric or thermoplastic material that provides the necessary elasticity and return force, while the plastic valve disk replaces metal valve balls. This material substitution enables easy disassembly and recycling while maintaining functional reliability.
2Ease of operation
If the dispenser extension moves along with the dispenser head, then the pumping mechanism functions properly, but liquid often misses its target and contaminates the surroundings
Solution Approach 1:
The invention segments the dispenser into two parts: a movable pump head that contains only the pumping mechanism, and a stationary housing that contains the dispenser opening. The pump head can move independently to perform the pumping action while the dispenser opening remains fixed in position, ensuring accurate liquid delivery to the target location without contamination of surroundings.
3Ease of manufacture
If a plastic spring is used instead of metal spring, then the dispenser becomes easier to recycle, but the spring must be designed to withstand compression and return forces
Solution Approach 1:
The invention changes the material parameter from metal to plastic for the spring, using elastomeric or thermoplastic materials that provide the necessary elasticity and force resistance. The plastic spring is designed with appropriate geometric parameters (ring configuration, connecting web thickness) to withstand compression during pumping and return to its original position, achieving both recyclability and functional strength.
4Ease of manufacture
If the valve is made of plastic material, then the dispenser components can be easily recycled together, but the valve must effectively close and release the dispenser opening
Solution Approach 1:
The invention changes the valve material from metal to plastic, using elastomeric or thermoplastic materials that can be easily recycled with the container. The plastic valve disk is designed with appropriate geometric parameters (thickness, diameter, flexibility) to effectively close the dispenser opening during pumping and release it for liquid dispensing, maintaining reliable sealing function while enabling easy recycling.
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 solution allows for easy and homogeneous emptying of liquids, improved user-friendliness, and effective recycling of the dispenser components, ensuring accurate liquid delivery and minimizing environmental impact.
Implementation Method 1
A plastic spring (35) is integrated into the housing (15) and surrounds the metering chamber (23). The spring (35) has a plurality of rings (45) arranged one above the other, which are in each case interconnected by at least one first connecting web (51a). The rings and ring segments can bend and the spring (35) can be compressed by an axial force and can return to its basic position when the force is removed
Data Source
AI summary
A pump dispenser for metered removal of a liquid from a container includes a housing for placement on the container to form a metering chamber, a rising tube connected to the metering chamber, and a pump head movable relative to the housing along a longitudinal axis of the dispenser to carry out a pump stroke. The pump dispenser has a piston secured to the pump head that is movable in the metering chamber to convey the liquid, a dispenser opening is connected to the metering chamber through which metered liquid can leave the pump dispenser, a spring that resets the pump head relative to the housing, and a valve that defines a conveying direction of the liquid from the rising tube into the dispenser opening and that blocks a conveying process in the opposite direction. The spring has a plurality of rings connected by respective connecting webs.