One-Piece Elastomeric Dispensing Pump with Integrated Air Vent
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Solution Overview
Problem
Existing dispensing pumps have complex designs with multiple parts, leading to high manufacturing costs, low restitution rates, corrosion issues, and contamination risks, while also being prone to leaking and requiring multiple assembly steps.
Innovation Solution
A dispensing pump with a one-piece over-molded structure featuring a tamper-evidence linkage, off-centered channels, and integrated air vents, which reduces the number of parts, enhances assembly efficiency, and improves water/dust proofing by eliminating traditional ball/piston valves and springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-part pump design is used, then valve function and pumping action are achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple functional components (piston, valves, springs, housing) into a single integrated elastomeric element. The elastomeric pump element forms the piston body, pumping chamber, and valve mechanisms as one unified component, eliminating the need for separate metal parts and reducing assembly complexity while maintaining reliable valve function.
Solution Approach 2:
The elastomeric pump element performs multiple functions simultaneously: it acts as the piston structure, forms the pumping chamber, provides valve seating surfaces, incorporates spring elements for valve operation, and creates sealing interfaces. This multi-functional design replaces numerous specialized components with a single versatile element.
2Reliability
If traditional metal springs and valves are used, then pumping action is achieved, but corrosion and contamination risks increase
Solution Approach 1:
The patent uses a homogeneous elastomeric material for the pump element that is chemically compatible with the liquid being pumped. This eliminates galvanic corrosion between dissimilar metals and prevents contamination from metal particulates, as the entire pump element can be made from food-grade or chemically resistant elastomers that do not corrode or shed particles.
Solution Approach 2:
The patent employs elastomeric composite materials that combine the flexibility needed for pumping action with chemical resistance properties. The elastomeric material provides both mechanical compliance for valve operation and chemical inertness to prevent corrosion and contamination, replacing traditional metal-composite assemblies.
3Reliability
If multiple separate components are assembled, then pump functionality is achieved, but assembly time and manufacturing cost increase
Solution Approach 1:
The patent integrates multiple pump components into a single molded elastomeric element that can be produced as one piece through rubber molding processes. This eliminates the need for assembling separate pistons, valves, springs, and housing components, dramatically reducing assembly time and manufacturing complexity while maintaining full pump functionality.
Solution Approach 2:
The elastomeric pump element is designed to self-assemble into the pump housing through elastic deformation and geometric interlocking features. The element's inherent elasticity allows it to snap into place and self-seal against the housing and valve seats, eliminating the need for complex fastening operations or precision alignment procedures.
4Ease of operation
If conventional pump design is used, then dispensing function is achieved, but water and dust proofing is insufficient
Solution Approach 1:
The patent uses the elastomeric pump element itself as a flexible sealing barrier that prevents water and dust ingress. The elastomeric material forms continuous sealing surfaces against the pump housing and connection interfaces, creating a protective barrier while maintaining the dispensing function through its elastic deformation capabilities.
Solution Approach 2:
The patent integrates sealing functions directly into the structural design of the elastomeric pump element. The same elastomeric material that provides pumping action also forms the sealing interfaces, combining protective and functional roles in a single component rather than adding separate sealing elements.
Data Source
AI summary
A dispensing pump mechanism is provided. The pump comprises integrally molded temper-evidence part between a container collar and a spout; said collar has multiple off-centre outlet channel for dispensing one or more products from the container; said collar also comprises an integrated air vent to be blocked and opened by the rotation of the spout. The whole pump can be over-molded one-piece structure with elastic parts as being actuating parts. The pump improves the functions of the pump, such as lower restitution rate, less structural parts, lower cost, water/dust proof, lightweight, easy assembly.