Capsule-Based Inhaler With Integrated Cutting Blade
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Solution Overview
Problem
Existing dry powder inhalers face challenges in delivering reproducible doses efficiently due to issues with powder dispersion, spilling, and mechanical complexity, which increases manufacturing costs and reduces patient compliance.
Innovation Solution
A re-usable dry powder inhaler with a simplified design featuring a two-component structure, integrated cutting means, and a capsule tray that slides within the inhaler body, allowing for easy loading and inhalation with minimal steps, and using plastic or metal blades for precise capsule cutting to prevent powder spillage and enhance dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a valve mechanism is added to prevent powder spillage, then powder leakage is reduced, but device complexity increases and powder accumulation in the valve interferes with operation
Solution Approach 1:
The harmful valve mechanism is completely removed from the system. Instead of using a valve to control powder flow, the invention extracts this component entirely and replaces it with a simple capsule-based system where powder is contained within the capsule and delivered directly through the mouthpiece during inhalation, eliminating both the valve and the associated powder accumulation problem
Solution Approach 2:
The invention uses disposable capsules to contain the medicament powder. Each capsule is a simple, inexpensive, single-use component that eliminates the need for complex reusable mechanisms like valves. The capsule is inserted, used once, and then discarded, preventing powder accumulation issues that would affect reusable components
2Manufacturing precision
If metal cutting means or springs are added to the inhaler, then capsule cutting capability is improved, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The cutting function is merged with the mouthpiece structure itself. The mouthpiece incorporates a cutting element (such as a sharp edge or blade integrated into the plastic structure) that cuts the capsule as it is inserted or during the inhalation process, eliminating the need for separate metal cutting means and springs, thereby simplifying assembly while maintaining cutting capability
Solution Approach 2:
The invention changes the material parameter of the cutting element from metal to plastic or composite materials that can be integrated into the mouthpiece. This parameter change allows the cutting function to be achieved without metal components, simplifying manufacturing and assembly while maintaining sufficient cutting precision for capsule opening
3Ease of operation
If the capsule tray is made movable with sliding capability, then ease of loading is improved, but device complexity increases
Solution Approach 1:
The device is segmented into two main components: a stationary mouthpiece and a movable capsule tray. This segmentation allows the tray to be independently moved for loading and removal operations, improving ease of use while keeping the overall device structure simple and modular, with each component having a specific function
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 achieves efficient and reproducible delivery of pharmaceutical powders with reduced mechanical complexity, lower manufacturing costs, and improved patient compliance by ensuring precise capsule cutting and powder dispersion, while maintaining reliability and ease of use.
Implementation Method 1
the suction flow generated by the patient's inspiratory effort disperses and entrains the powder into the mouthpiece
Data Source
AI summary
A dry powder inhaler for pulmonary or nasal use, employing capsules containing a dose of powder for inhalation, comprising two operating components and an optional cover. Air is drawn by the patient via a mouthpiece or nosepiece which is in communication with the capsule and travels via air paths through the device and through the capsule thereby dispersing and entraining the dose of powder. The capsule is cut by cutting means located on one of the components, in a manner which eliminates or minimizes capsule debris and minimizes powder leakage during use. The inhaler body and capsule cutting blades comprise a single operating component and they may be manufactured in a single unitary step. The invention affords a very economical and simple device for the delivery of pulmonary medicines.