Adjustable Portafilter Dosing Blade for Precise Fill Height

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Solution Overview

Problem

Espresso machines require a dosing tool that allows for accurate and repeatable adjustment of the fill height in the portafilter, as the internal diameter and coffee depth are critical for espresso preparation, but existing tools lack precision and interchangeability.

Innovation Solution

A portafilter dosing tool with interchangeable or adjustable blades, featuring an indexing feature with tactile feedback and a fill height indicator, allowing for precise adjustment and compatibility with various portafilter diameters through a two-part case and indexing wheel mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed blade dosing tool is used, then the structure is simple, but it cannot accommodate different portafilter sizes and provides limited adjustment precision

Engineering Contradiction:

Improvecompatibility with various portafilter diametersVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The blade is made adjustable through a threaded engagement mechanism with an indexing wheel, allowing the blade position to be dynamically changed to accommodate different portafilter diameters and fill heights, transforming a static tool into an adaptive one

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The dosing tool is divided into separate functional components including a removable blade, an indexing wheel mechanism, and a handle, allowing for modular assembly and interchangeability to suit different portafilter sizes

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If manual estimation of fill height is used, then the operation is simple, but the measurement precision and repeatability are insufficient

Engineering Contradiction:

Improvefill height measurement accuracyVSAvoidoperation complexity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

An indexing wheel with tactile feedback features (teeth and pawls) provides audible and tactile confirmation when the blade reaches precise positions, enabling accurate fill height measurement without requiring complex visual estimation or additional measuring instruments

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The indexing wheel acts as an intermediary mechanism between the user's manual operation and the blade position, translating rotational input into precise linear displacement of the blade with repeatable positioning at each index mark

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If the blade position cannot be adjusted, then the device is simple to manufacture, but the manufacturing precision of the dosing amount varies

Engineering Contradiction:

Improvedosing amount consistencyVSAvoidmanufacturing complexity

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The blade position is made adjustable through threaded engagement with the indexing wheel mechanism, allowing precise control over the blade's depth and angle to achieve consistent dosing across different portafilter configurations

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The blade's positional parameters (depth, angle, distance from portafilter rim) can be changed and standardized through the indexing wheel's indexed positions, enabling repeatable dosing precision without requiring custom manufacturing for each application

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11779151B2Dosing tool

Publication Date: 2023.10.10 BREVILLE HLDG PTY LTD

AI summary

A coffee dose adjustment tool has interchangeable or adjustable blades for adjustment of the coffee fill height within a portafilter dosing tool.