Dual Applicator Fluid Dispenser Stem with Capillary Wick
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Solution Overview
Problem
Existing fluid dispensers with a defined fluid passageway from the reservoir to the writing point tend to clog when viscous fluids dry, rendering them inadequate for consumer use, especially when both the writing point and applicator are used to apply fluids.
Innovation Solution
A fluid dispenser with a dual applicator assembly and an unrestricted fluid passageway between the writing point and the reservoir, allowing for the return of fluid from the writing point to the reservoir, which prevents clogging and facilitates efficient use with viscous fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a defined fluid passageway is provided from the reservoir to the writing point, then both the applicator and writing point can be used to apply fluid, but the fluid passageway becomes clogged when viscous fluids dry
Solution Approach 1:
The fluid passageway is segmented into multiple channels within the stem assembly, creating separate flow paths that prevent complete blockage. The stem contains internal passages that divide the fluid flow, ensuring that if one path becomes partially clogged, alternative paths remain open for fluid delivery to both the writing point and applicator.
Solution Approach 2:
The stem assembly acts as an intermediary component between the reservoir and the application points, incorporating a wick or capillary structure that mediates fluid transport. This intermediary mechanism allows viscous fluids to be drawn through the passageway via capillary action rather than gravity alone, preventing stagnation and clogging while maintaining dual application capability.
2Ease of operation
If the fluid dispenser is inverted for use with the writing point, then the writing point can apply fluid, but fluid collects along the passageway and dries causing clogs
Solution Approach 1:
The patent inverts the traditional fluid delivery approach by using capillary wick action rather than gravity-dependent flow. The wick structure draws fluid upward and through the passageway in the opposite direction of gravity, preventing fluid collection and stagnation in the passageway during inverted use, thereby eliminating the clogging problem while maintaining writing point functionality.
Solution Approach 2:
The capillary wick system ensures continuous fluid movement through the passageway during inverted writing point use. The wick maintains constant fluid flow and replenishment, preventing fluid from pooling and drying in the passageway. This continuous action keeps the fluid in motion, eliminating stagnation and preventing clog formation.
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 design ensures that fluid dispensers remain functional even with viscous fluids, preventing clogging and allowing for continuous use of both the writing point and applicator without drying issues, enhancing user experience.
Implementation Method 1
a channel through the first end, the channel defining a fluid passageway between the writing point and the fluid reservoir
Data Source
AI summary
A fluid dispenser includes a container defining a fluid reservoir and having an opening and a dual applicator assembly removably attached to the container. The dual applicator assembly includes a cap adapted to substantially seal the opening. A writing point is disposed in the cap and a stem is coupled to the cap. The stem has first and second ends and includes a channel through the first end. The channel defines a fluid passageway between the writing point and the fluid reservoir. Finally, an applicator is coupled to the second end of the stem.