Pump Assembly Gas Chamber Rebound Eliminates Metal Springs
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Solution Overview
Problem
The existing pump assemblies with contents discharge functions face challenges in recycling due to the integration of metal springs, which are difficult to separate from plastic components, leading to inefficient recycling and potential gas leakage issues with sealing rings.
Innovation Solution
A pump assembly design that eliminates the need for metal components by using gas pressure to drive the press rod's rebound, creating sealed gas chambers without additional sealing rings, allowing the entire assembly to be made of plastic and enhancing recyclability while reducing gas leakage risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a metal spring is used inside the pump main body to enable the press rod to rebound, then the rebound function is achieved, but the pump assembly becomes difficult to recycle due to the integration of metal and plastic materials
Solution Approach 1:
The invention extracts and removes the metal spring from the pump assembly, replacing it with a gas chamber system that uses compressed gas to provide the rebound force. This eliminates the metal component entirely, allowing the entire pump assembly to be made of plastic materials that can be easily recycled together as a single unit.
Solution Approach 2:
The invention uses a gas chamber system where compressed gas stored in the first gas chamber provides the force to push the press rod back to its initial position after pressing. This pneumatic mechanism replaces the mechanical spring system, achieving the same rebound function without metal components.
2Reliability
If a sealing ring is used to seal the gap between the access hole and rod body, then sealing is provided, but gas leakage occurs due to poor sealing effect
Solution Approach 1:
The invention removes the sealing ring component entirely and replaces it with a sealing structure formed by precise positioning features integrated into the rod body and access hole design. The rod body includes positioning protrusions that fit into corresponding positioning grooves in the access hole, creating a seal through geometric interference rather than a separate sealing ring.
Solution Approach 2:
The sealing function is merged into the structural design of the rod body and access hole assembly. The positioning protrusions and grooves are integral parts of the components themselves, combining the sealing function with the mechanical connection function, eliminating the need for a separate sealing ring component.
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 enables efficient recycling of the pump assembly by eliminating metal components and improves sealing efficacy by eliminating the need for sealing rings, reducing gas leakage and enhancing user experience through effective gas pressure management.
Implementation Method 1
a first gas chamber, which is a sealed chamber collectively defined by the piston portion, the inner-housing top wall, the outer wall of the first inner-housing sidewall and the inner wall of the second inner-housing sidewall
Implementation Method 2
the piston portion is provided in the first chamber and slidably contacts with an inner wall of the second inner-housing sidewall in a sealing manner
Data Source
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AI summary
An object of this disclosure is to provide a pump assembly and a container with contents discharge function. According to the pump assembly provided by this disclosure, since the outer wall of the first inner-housing sidewall, the inner wall of the second inner-housing sidewall and the inner-housing top wall define a first chamber with a first opening, and the gas chamber of the first chamber is a sealed chamber collectively defined by the piston portion, the inner-housing top wall, the outer wall of the first inner-housing sidewall and the inner wall of the second inner-housing sidewall, the formation of the sealed chamber does not require an additional sealing ring, thereby reducing the risk of gas leakage due to aging of the sealing ring. The container with contents discharge function provided by this disclosure comprises the above pump assembly.