Trigger Dispenser With External Baffle Delivery Valve
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Solution Overview
Problem
Existing trigger dispenser devices are not economically viable and are not compatible with increasingly aggressive liquid products, requiring different materials and designs for various applications.
Innovation Solution
A trigger dispenser device with a polymer frame, suction and delivery valves, and a return mechanism that allows for efficient dispensing and aspiration of liquids, using materials like low-density polyethylene, acetalic resin, and polypropylene to ensure compatibility with aggressive liquids while simplifying production and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different materials and designs are used for various liquid applications, then chemical compatibility with aggressive liquids is improved, but device complexity and production costs increase
Solution Approach 1:
The patent applies universality by designing a single trigger dispenser device structure that can handle both aggressive and non-aggressive liquids. The device uses a polymer frame with specific chemical resistance properties that provide universal compatibility across different liquid types, eliminating the need for multiple specialized device versions.
Solution Approach 2:
The patent utilizes parameter changes by selecting specific polymer materials with appropriate chemical resistance parameters. The frame is made from polymers selected for their resistance to aggressive chemicals, while internal components use materials optimized for their specific functional requirements, achieving chemical compatibility through material parameter selection rather than structural complexity.
2Reliability
If specialized materials are used for aggressive liquids, then chemical compatibility is improved, but production costs increase
Solution Approach 1:
The patent addresses production cost by selecting polymer materials that provide necessary chemical resistance at reasonable cost levels. The frame uses cost-effective polymers with adequate chemical resistance, while more expensive materials are used only where functionally necessary for internal components, optimizing the balance between chemical compatibility and manufacturing cost.
3Reliability
If complex designs are used for different liquid types, then chemical compatibility is improved, but assembly time increases
Solution Approach 1:
The patent reduces assembly time through universality by designing a standardized trigger dispenser structure that accommodates different liquid types without requiring complex reconfiguration. The universal frame design with integrated valve mounting and standardized component interfaces enables rapid assembly regardless of the specific liquid application.
Solution Approach 2:
The patent applies merging by integrating the valve mounting structures directly into the frame and combining multiple functions into unified components. The delivery valve and suction valve are both mounted on the same frame structure, and the trigger mechanism integrates piston, spring, and linkage functions, reducing the number of separate assembly operations required.
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 is capable of handling aggressive liquids while being economical to produce, with simplified assembly and reduced machine time, ensuring high-speed and reliable production.
Implementation Method 1
return means, comprising an elastic element 200, suitable for constantly influencing the trigger 12 towards the initial rest position
Implementation Method 2
suction valve means suitable to permit the passage of liquid from the suction pipe 6 to the pumping chamber 4 when the piston 8 returns from the final position to the initial position
Implementation Method 3
delivery valve means suitable to permit the passage of the pressurised liquid from the pumping chamber 4 to the dispensing pipe 14 when the piston translates from the initial position to the final position
Implementation Method 4
By operating the trigger 12, the piston 8 translates from the initial position towards the final position, pressing the liquid contained in the pumping chamber 4
Data Source
AI summary
A trigger dispenser (1) for liquids comprises a suction valve (30) comprising a diaphragm (32) housed in the pumping chamber (4) and a delivery valve (60), separate from the suction valve (30), comprising a baffle (62) external to the dispensing pipe (14). The diaphragm (32) of the suction valve (30), during liquid dispensing, abuts on the bottom wall (10b) of the pumping chamber (4) land covers the suction opening (6a), and the baffle (62) of the delivery valve (60), during the return, abuts on the crown surface (18) which surrounds the inlet opening (14a) of the dispensing pipe (14).