Ported Brush Applicator Leak-Proof Design
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Solution Overview
Problem
Conventional brush applicators tend to leak and suffer damage during use due to poor design, particularly when attempting to remove the brush from the ferrule or cap.
Innovation Solution
A ported brush applicator design featuring a brush with bristles attached to a ferrule, an applicator base cap with a tapered through-hole, and fluid ports that enable leak-proof liquid flow from a container into the bristles, preventing rotation and damage by securing the brush to the cap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional brush applicators are designed with simple structure, then ease of manufacture is improved, but leakage occurs due to poor design
Solution Approach 1:
The applicator is divided into distinct functional segments: a cap portion with tapered through-holes, a ferrule with fluid ports, and a brush portion. This segmentation allows each component to be optimized for its specific function while maintaining ease of assembly and manufacture.
Solution Approach 2:
The ferrule acts as an intermediary component between the cap and brush, containing fluid ports that connect the tapered through-holes in the cap to the bristles. This intermediary structure enables controlled liquid flow while maintaining a secure, leak-proof connection.
2Ease of operation
If conventional brush applicators allow easy removal of brush from ferrule, then ease of operation is improved, but brush damage occurs when users grasp ferrule or brush instead of cap
Solution Approach 1:
The applicator design creates a dynamic interaction where the tapered through-holes and fluid ports form a mechanical interference fit that secures the ferrule to the cap. This dynamic locking mechanism prevents accidental detachment while allowing intentional removal by grasping the cap, not the brush or ferrule.
Solution Approach 2:
The ferrule serves as a structural intermediary that transfers mechanical loads between the cap and brush. Its reinforced design with fluid ports provides a secure connection point that distributes stress, preventing brush damage during normal handling and removal operations.
3Device complexity
If conventional brush applicators use simple cap design, then device complexity is reduced, but liquid flow control to bristles is insufficient
Solution Approach 1:
The liquid delivery system is segmented into multiple controlled pathways: tapered through-holes in the cap that guide liquid flow, and fluid ports in the ferrule that distribute liquid to the bristles. This segmentation provides reliable flow control while maintaining relatively simple construction.
Solution Approach 2:
The tapered geometry of the through-holes creates parameter changes in liquid flow characteristics, utilizing capillary action and surface tension effects to control liquid distribution to the bristles without requiring complex pumping or valve mechanisms.
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 minimizes leakage and prevents damage to the brush applicator during normal use by ensuring a secure attachment and efficient liquid application, maintaining a liquid-tight seal even when the container is inverted or pressurized.
Implementation Method 1
the applicator base mesa having at least one tapered through-hole extending from a mesa end surface into the cap opening; and at least one fluid port having a first end in the plurality of bristles and a second end in the at least one tapered through-hole. The fluid port is configured to enable the liquid material to flow from the cap opening, through the applicator base mesa, the at least one fluid port, and into the plurality of bristles.
Data Source
AI summary
A ported brush applicator that includes a brush with a ferrule; an applicator base cap attached to the brush, where the applicator base cap includes a cap section having a cap opening that is sized and configured for attachment to a container; an applicator base mesa protruding from the cap section and secured within the ferrule, where the applicator base mesa has at least one through-hole and a fluid port having a first end in the brush and a second end in the through-hole.