Vented Caps for Dispensers with Movable Vent Plug
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Solution Overview
Problem
Existing venting caps for dispensers are difficult to manufacture, assemble, and use, and there is a need for improved designs that can effectively vent the interior space to prevent bacterial growth and residual product evaporation in healthcare and pharmaceutical applications.
Innovation Solution
A vented cap design featuring a cap portion and a vent plug portion that can be assembled to seal in a delivery state and transition to a vented state by moving the vent plug relative to the cap, allowing air to enter the interior space through vent holes, facilitated by a tear strip mechanism that disengages the cap seal and allows the cap to move, opening the space for ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vent plug is used to seal the cap interior in delivery state, then manufacturing precision and assembly difficulty increase, but venting function is achieved
Solution Approach 1:
The vent plug transitions from a static sealed position to a dynamic movable position. The plug is designed to be movable along the central axis within the cap interior, allowing it to switch between sealing the vent hole (in delivery state) and being dislodged to allow venting (in use state). This dynamic capability resolves the contradiction by providing both reliable sealing when needed and easy venting when required.
Solution Approach 2:
The vent plug utilizes the force applied during cap removal to automatically dislodge and vent the interior space. When the user pulls the cap off the dispenser, the relative movement between the cap and dispenser automatically moves the plug away from the vent hole, eliminating the need for separate manual venting actions or complex mechanisms.
2Object-affected harmful factors
If the vent plug is sealed against the cap, then air circulation is prevented, but product contamination is reduced during shipping
Solution Approach 1:
The system dynamically switches between sealed and vented states based on usage phase. During shipping and storage, the plug remains in the sealed position preventing contamination. During use, the plug is dislodged to enable air circulation for drying and evaporation. The movable plug design allows this state transition without requiring separate mechanisms for each function.
Solution Approach 2:
The vent plug is pre-positioned in the sealed state during manufacturing and shipping to prevent contamination. The sealing action is prepared in advance, and the user simply needs to perform the action of removing the cap to trigger the venting function, eliminating the need for separate manual venting steps.
3Object-affected harmful factors
If the cap is designed with venting features, then bacterial growth prevention is improved, but manufacturing complexity increases
Solution Approach 1:
The venting function is segmented into distinct components: the vent hole in the cap wall, the movable vent plug, and the sealing interface between them. This segmentation allows each component to be manufactured separately using standard processes, and then assembled together. The simplicity of individual components offsets the added complexity of the venting mechanism.
Solution Approach 2:
The system changes the physical state of the vent opening from closed to open by moving the plug along the central axis. This parameter change (position of the plug) controls the venting function without requiring complex mechanical structures. The vent hole geometry and plug position are the key parameters that control bacterial prevention while maintaining manufacturing simplicity.
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 effectively prevents bacterial growth and residual product evaporation by allowing air circulation within the cap, enhancing user safety and product quality by ensuring the cap can be easily assembled and used across various dispenser systems.
Implementation Method 1
a cap seal on the vent plug and a vent seal on the cap are also engaged, preventing air or atmosphere flow between the vent plug and cap
Implementation Method 2
allow air to flow over the dispenser head so that residual product may evaporate
Data Source
AI summary
A vented cap for a dispenser or dispensing system having a cap and a vent plug, the cap and vent plug engaged in a sealing position in a delivery or non-use state and disengaged in a vented state; the vent plug moveable relative to the cap only after having been engaged by the attached dispenser after a tamper evident or tear strip is removed.