Dry Powder Inhaler Carrier Stacking With Shared Dose Dispensing

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Solution Overview

Problem

Existing dry powder inhalers are complex, require multiple parts, and often have alignment issues that affect the efficiency and reliability of medicament delivery, leading to suboptimal performance and increased environmental impact.

Innovation Solution

A dry powder inhaler design that stacks medicament carriers with shared components, uses a simplified dispensing mechanism, and incorporates a collector with optimized airflow paths to ensure efficient medicament delivery and reduced part count, while accommodating wider tolerances and providing clear dose tracking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple separate mechanisms are used for each medicament carrier, then each carrier can be independently controlled, but the device complexity and number of parts increases

Engineering Contradiction:

Improveindependent control of each carrierVSAvoidnumber of parts

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple separate dispensing mechanisms into a single shared mechanism that can service multiple medicament carriers simultaneously. The indexing system, peeling mechanism, and transport system are consolidated into common components that operate on all carriers through shared structural elements, reducing the total part count while maintaining functional independence through modular carrier design

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The dispensing mechanism is designed with universal components that can handle multiple types of medicament carriers. The indexing system uses a common ratchet mechanism that can index multiple carriers, the peeling mechanism uses a universal blade design, and the transport system employs a shared conveyor structure, allowing one mechanism to perform multiple functions across different carrier positions

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Volume of moving object

If medicament carriers are stacked closely together, then space is saved, but alignment precision deteriorates

Engineering Contradiction:

Improvespace utilizationVSAvoidalignment precision

Core Design Contradiction:

Volume of moving objectVSManufacturing precision

Solution Approach 1:

The patent segments the internal structure into distinct modular zones for each medicament carrier, with individual indexing positions and separate peeling stations. Each carrier is treated as an independent module with its own alignment references, allowing precise positioning within the stacked configuration while maintaining compact overall dimensions

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces intermediary alignment features such as guide rails, positioning pins, and reference surfaces that mediate between the stacked carriers and the dispensing mechanism. These intermediary elements ensure precise alignment is maintained even when carriers are closely stacked, by providing mechanical guidance and tolerance compensation

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If a complex indexing mechanism is used, then precise dose positioning is achieved, but the device complexity increases

Engineering Contradiction:

Improvedose positioning accuracyVSAvoidindexing mechanism complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The indexing mechanism is designed to be self-indexing through the interaction between the ratchet teeth and pawl, where the mechanism automatically positions itself at precise intervals without requiring external control systems. The mechanical engagement of the ratchet with the carrier edges provides automatic dose counting and positioning, eliminating the need for complex electronic sensors or motors while maintaining high positioning accuracy

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces complex electronic or computerized indexing systems with a purely mechanical ratchet-based indexing mechanism. The precision is achieved through carefully designed ratchet tooth geometry and mechanical engagement features that provide inherent positioning accuracy without requiring electronic control, sensors, or power sources

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 achieves efficient medicament delivery with reduced parts, improved alignment tolerance management, and clear dose tracking, enhancing user experience and environmental sustainability.

Implementation Method 1

a collector configured to collect the medicament from the opened pocket via an airflow that passes through the pocket and configured to deliver the resulting medicament-air mixture towards the mouthpiece

Methodology Applied

Scientific EffectAirflow:

Data Source

PatentEP4696349A1Apparatus for administering a medicament to a patient

Publication Date: 2026.02.18 EMPHASYS IMPORTADORA EXPORTADORA E DISTRIBUIDORA

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AI summary

There is provided an apparatus (100) for administering a medicament to a patient, comprising: a plurality of elongated medicament carriers, wherein closed pockets of the medicament carriers contain a medicament in powder form; and a dispensing mechanism configured to act on the plurality of elongated medicament carriers upon an actuation of an manual actuation lever (402) to dispense the medicament carried by the plurality of elongated medicament carriers.