Piercing Tip Sealing in Dischargers to Prevent Fluid Leakage

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Solution Overview

Problem

Existing medical, dental, and veterinary dispensers fail to effectively prevent infections and are prone to leaks, making them inefficient and costly.

Innovation Solution

A discharger with a static piston and sealing elements that ensure a direct seal between moveable parts, preventing fluid leakage and misalignment, and a child safety lock to prevent accidental activation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional dispensers are used to treat patient symptoms, then basic fluid delivery is achieved, but infection prevention is insufficient and leakage occurs

Engineering Contradiction:

Improveinfection prevention capabilityVSAvoidfluid leakage

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The sealing element is extracted as a separate component from the piston assembly, allowing it to be independently optimized and positioned. This separate sealing element can be made from specific materials optimized for sealing performance while the piston maintains its structural function, resolving the contradiction between reliability and leakage prevention.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

A sealing element is introduced as an intermediary component between the piston and container walls. This mediator prevents direct contact and potential leakage paths between moving parts, creating a barrier that prevents fluid escape while allowing the piston to move freely within the container.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the discharger uses a static piston with moveable container design, then precise fluid delivery is achieved, but misalignment between components occurs

Engineering Contradiction:

Improvefluid delivery precisionVSAvoidcomponent alignment

Core Design Contradiction:

Measurement precisionVSManufacturing precision

Solution Approach 1:

The sealing element acts as a flexible component that can deform and adapt to slight misalignments between the piston and container. This flexibility compensates for manufacturing tolerances and assembly variations, maintaining precise fluid delivery without requiring extremely tight alignment tolerances.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The sealing element provides a cushioning effect that absorbs and compensates for alignment errors before they can cause leakage or malfunction. By anticipating and accommodating potential misalignment issues, the system maintains reliable operation despite variations in manufacturing precision.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of operation

If the discharger is designed with simple structure for ease of use, then cost-effectiveness is improved, but sealing reliability may be compromised

Engineering Contradiction:

Improveuser simplicityVSAvoidsealing performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The sealing function is segmented from the main piston structure into a separate, dedicated sealing element. This segmentation allows the sealing mechanism to be optimized independently for reliability while the overall device maintains a simple, easy-to-use design. The separate sealing element can be easily manufactured and assembled without complicating the user interface or operation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sealing element can be designed as a disposable component that is inexpensive to manufacture but provides high sealing reliability during use. This approach allows for simple, cost-effective device design while maintaining reliable sealing performance through purpose-built, single-use sealing elements that are optimized for their specific function.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS20260041856A1Discharger with improved piercing tip

Publication Date: 2026.02.12 MEDMIX SWITZERLAND AG

AI summary

A discharger includes a dispensing element and a housing, the housing having a piston connected to the dispensing element a fluid conducting manner and with the piston arranged within the housing, and a container, the container moveable relative to the piston and the housing, with the piston including a piercing tip to pierce a membrane or seal of the container when the container is moved towards the housing. The piston includes a sealing element in the region of the piercing tip, with the sealing element providing a seal between the piercing tip and an inner surface of the container when the container is moved relative to the housing into a position in which the membrane or seal is pierced and the sealing element engages the inner surface to prevent the fluid from passing between the sealing element and the inner surface and into a part of the housing.