Heated Dose Cartridge Structure for Consistent Inhalation Flow
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Solution Overview
Problem
Existing inhaler devices struggle to deliver a consistent and efficient pulmonary delivery of heat-vaporizing drug substances, particularly botanical substances, due to variability in inhalation strength and the need for precise control of inhalation flow rates.
Innovation Solution
A dose cartridge for an inhaler device featuring a flat pallet of airflow-permeable material with an electrically resistive heating element extending across its faces, supported by a frame, allowing for controlled vaporization of the drug substance and consistent airflow, even with varying inhalation strengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible valve is used to control inhalation flow rate, then medication delivery consistency is improved, but device complexity increases
Solution Approach 1:
The patent extracts the flow control function from a complex flexible valve mechanism and implements it through a simple rigid baffle structure with predefined openings. The baffle is positioned to create a fixed flow path that restricts and directs airflow without requiring any moving parts or flexible components, thereby maintaining medication delivery consistency while eliminating device complexity.
Solution Approach 2:
The patent replaces the mechanical flexible valve system with a static rigid baffle structure. Instead of using a flexible membrane that responds dynamically to pressure changes, the invention uses a fixed geometric structure with controlled openings that passively regulate airflow through its design, substituting an active mechanical control system with a passive structural solution.
2Reliability
If airflow path is restricted to control inhalation rate, then medication delivery consistency is improved, but inhalation ease deteriorates
Solution Approach 1:
The patent applies local quality by creating a focused, restricted flow path through specific openings in the baffle structure rather than uniformly restricting the entire airflow. The baffle contains strategically positioned openings that guide air through a controlled route, providing sufficient resistance for consistent dosing while maintaining adequate airflow velocity and volume for comfortable inhalation.
Solution Approach 2:
The rigid baffle acts as an intermediary element between the air source and the user's inhalation. It mediates the airflow by creating a controlled path with predefined resistance, transforming the raw airflow into a regulated stream that maintains both consistency for accurate dosing and sufficient flow rate for ease of inhalation.
3Device complexity
If rigid baffle structure is used instead of flexible valve, then device complexity is reduced, but adaptability to variable inhalation strength deteriorates
Solution Approach 1:
The patent implements self-service through the passive flow regulation mechanism. The rigid baffle structure with its fixed openings automatically adapts to different inhalation strengths without requiring active control. When users inhale with varying force, the pressure differential across the baffle openings naturally adjusts the airflow rate, allowing the device to self-regulate and accommodate variable inhalation patterns without complex control systems.
Solution Approach 2:
The patent utilizes parameter changes in the airflow system to achieve adaptability. The fixed baffle structure creates a flow path where airflow rate and velocity naturally vary in response to changes in user inhalation strength. The system exploits the inherent relationship between pressure differential, flow rate, and opening geometry to automatically adjust parameters and maintain effective medication delivery across different inhalation intensities.
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
Ensures consistent and efficient pulmonary delivery of heat-vaporizing drug substances by maintaining a controlled airflow and vaporization process, preserving the microstructure of botanical substances, and allowing for precise dosing and administration.
Implementation Method 1
an electrically resistive heating element extending at least partially across at least one of the two opposing faces from an attachment with the supporting member
Implementation Method 2
a flat pallet of airflow-permeable material including a heat-vaporizing drug substance
Implementation Method 3
the pallet having two opposing faces and being positioned in the dose cartridge so as to expose the two faces to airflow
Data Source
AI summary
Devices and methods are described for preparing, managing, and/or administering metered doses of substances for vaporized administration. In some embodiments, dose cartridges comprising at least one botanical substance include a heating element integrated into the cartridge in close contact with the botanical substance. In some embodiments, cartridge-mounted doses are stored in a magazine, optionally in carousel form, before use. Transport of a cartridge from a magazine to an electrically operated vaporizing chamber which activates the heating element is provided by a mechanical pickup means.