Trigger Dispenser Stop for Valve Limiting
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Solution Overview
Problem
Prior trigger dispenser devices with pre-compression valves often malfunction due to excessive opening under liquid pressure, and attempts to mitigate this with cover positioning can lead to further issues from impact and altered abutments.
Innovation Solution
A trigger dispenser device featuring a delivery valve with a stop positioned rearwards of the valve, independent of the cover, which acts as a pre-compression valve, opening only when liquid pressure exceeds a threshold, and a suction valve that prevents liquid return, ensuring reliable liquid pre-compression and dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the delivery valve is positioned without a rearward stop, then the valve can open fully under liquid pressure, but the valve opens more than required causing malfunctioning
Solution Approach 1:
A stop element is introduced as an intermediary component between the delivery valve and the cover. This stop acts as a mediator that limits the maximum opening of the delivery valve, preventing it from opening too much under liquid pressure while still allowing sufficient opening for proper liquid flow and pre-compression.
Solution Approach 2:
The delivery valve mechanism is designed to self-regulate its opening through the stop element. The valve automatically opens to the correct degree when liquid pressure builds up, and the stop provides automatic limiting without requiring external control mechanisms, making the system self-regulating.
2Ease of operation
If the cover is positioned rearwards of the delivery valve to limit its excursion, then the valve opening is restricted, but the impact of the cover alters the abutment for the delivery valve causing malfunctioning
Solution Approach 1:
The limiting function is separated from the cover structure and assigned to a dedicated stop element. This segmentation allows the cover to maintain its primary protective and aesthetic functions while the stop element specifically handles the valve opening limitation, preventing interference and abutment alteration.
Solution Approach 2:
The stop element serves as an intermediary between the delivery valve and the cover, providing a dedicated abutment surface that limits valve excursion without the cover directly contacting or impacting the valve. This intermediary prevents the cover from altering the valve abutment while still achieving the desired opening limitation.
3Device complexity
If the cover serves both protective and valve-limiting functions, then structural integration is achieved, but the impact of the cover alters the abutment for the delivery valve
Solution Approach 1:
The valve-limiting function is extracted from the cover structure and implemented as a separate stop element. This segmentation reduces the functional burden on the cover, allowing it to serve primarily as a protective component while the stop element handles the precise mechanical function of limiting valve opening, thereby improving reliability.
Solution Approach 2:
The valve-limiting function is extracted from the cover and assigned to a dedicated stop component. This extraction allows the cover to maintain its structural integrity and protective role without the complicating factor of directly interfacing with the delivery valve mechanism, preventing abutment alteration issues.
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 achieves reliable pre-compression and dispensing with improved functionality and ease of assembly, reducing production time and preventing cover-induced malfunctions, while allowing the cover to serve only an aesthetic role.
Implementation Method 1
said return means comprise an elastic element (200)
Implementation Method 2
delivery valve means suitable to prevent the passage of liquid from the pumping chamber (4) to the dispensing pipe (14) until the liquid acts on said delivery valve means with a force exceeding a threshold value
Implementation Method 3
suction valve means suitable to allow the passage of liquid from the suction pipe (6) to the pumping chamber (4) during the return of the piston (8) from the final position to the initial position and to prevent the return of liquid from the pumping chamber (4) to the suction pipe (6) during the translation of the piston (8) from the initial position to the final position
Data Source
AI summary
A trigger dispenser (1) for liquids comprises a suction valve (30) and a delivery valve (60), separate from the suction valve (30). The dispenser (1) has a detachable stop (100), comprising a bottom (104) positioned rearwards of the delivery valve (60) to form an end stop abutment with this during the dispensing step.