Vortex Capsule Cavity for Dry Powder Inhaler Particle Delivery
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Solution Overview
Problem
Dry powder inhalers often fail to deliver particles effectively to the lungs at conventional smoking regime inhalation air flow rates, are complex to operate, and difficult to manufacture at high speeds, lacking a familiar and convenient user interface.
Innovation Solution
An inhaler article with a vortex capsule cavity featuring helical features on its inner surface to induce and maintain a swirling airflow, stabilizing a capsule containing nicotine and flavor particles, allowing for uniform delivery over multiple inhalations, and resembling a conventional cigarette in design for ease of use and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dry powder inhalers are used, then particles can be delivered to the lungs, but they fail to deliver particles effectively at conventional smoking regime inhalation air flow rates
Solution Approach 1:
The patent employs a vortex-generating airflow mechanism that creates rotational flow patterns within the inhaler. This pneumatic approach uses the user's natural inhalation airflow to generate a vortex that enhances particle suspension and delivery, eliminating the need for complex mechanical actuators while improving particle delivery effectiveness at conventional inhalation rates.
Solution Approach 2:
The invention modifies the airflow parameters by introducing a vortex flow pattern that changes the velocity distribution and turbulence characteristics within the inhaler. This parameter change enables effective particle delivery at lower, more conventional inhalation rates by optimizing the aerodynamic conditions for particle transport.
2Reliability
If complex dry powder inhalers with multiple parts are used, then particle delivery can be achieved, but they are complex to operate and difficult to manufacture at high speeds
Solution Approach 1:
The patent extracts and eliminates complex moving parts and mechanical actuators from the inhaler design. By removing these unnecessary components, the device achieves particle delivery capability through a simplified vortex-generating airflow mechanism, thereby reducing operational complexity and manufacturing difficulty while maintaining reliability.
Solution Approach 2:
The inhaler design allows the user's natural inhalation action to directly generate the vortex flow required for particle delivery. This self-service mechanism eliminates the need for separate activation mechanisms, motors, or control systems, simplifying the device structure and enabling high-speed manufacturing while maintaining effective particle delivery.
3Ease of manufacture
If conventional cigarette-like inhalers are used, then ease of manufacture and user convenience are improved, but particle delivery effectiveness may be compromised
Solution Approach 1:
The patent designs the inhaler to serve multiple functions within a single simplified structure: the vortex-generating airflow mechanism simultaneously achieves particle suspension, delivery, and user convenience. This multi-functionality allows the device to maintain cigarette-like ease of manufacture while ensuring reliable particle delivery through optimized aerodynamic design.
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 inhaler article effectively delivers dry powder particles to the lungs at conventional smoking regime air flow rates, providing a familiar user experience and simplifying manufacturing, with enhanced fractional particle delivery and uniform nicotine release over multiple inhalations.
Implementation Method 1
The vortex capsule cavity is configured to induce, enhance, or maintain swirling or a vortex of inhalation airflow through the capsule cavity of the inhaler
Implementation Method 2
The swirling or vortex of inhalation airflow induces rotation of a capsule contained within the capsule cavity
Implementation Method 3
One or more helical features on or in the inner surface of the capsule cavity induce, enhance, or maintain swirling or a vortex of inhalation airflow through the capsule cavity of the inhaler
Implementation Method 4
This enhanced inhalation airflow vortex gyroscopically stabilizes the spinning capsule within the vortex capsule cavity
Data Source
AI summary
An inhaler article includes a body extending along a longitudinal axis from a mouthpiece end to a distal end with an endpiece element at the distal end. A capsule cavity is defined within the body and extends along the longitudinal axis a cavity length. The capsule cavity includes a helical feature on or in an inner surface of the capsule cavity. The helical feature extends along the cavity length. An air inlet region is between the endpiece element and the capsule cavity. The air inlet region has an air inlet and an air passageway extending from the air inlet to the capsule cavity. A porous element defines a downstream end of the capsule cavity. A mouthpiece air channel extends from the capsule cavity, through the porous element to the mouthpiece end.