Waffle-Patterned Coffee Filter for Consistent Pour-Over Extraction
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Solution Overview
Problem
Existing pour-over coffee devices suffer from erratic flow/drip rates and inconsistent extraction of desirable coffee solubles due to single-cone filter designs, leading to issues like 'caking' and uneven saturation, which result in suboptimal flavor extraction and potential bitterness.
Innovation Solution
A waffle-patterned coffee filter with multiple mini-cone units and strategically placed holes, allowing for even hydrostatic pressure distribution and optimal flow, eliminating the need for paper filters and promoting consistent extraction of desirable coffee oils while preventing bitter flavors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-cone filter design is used, then the device structure is simple, but the flow rate becomes erratic and extraction is inconsistent
Solution Approach 1:
The filter is divided into multiple mini-cone units (e.g., 3-10 cones) arranged in a waffle pattern instead of using a single large cone. Each mini-cone has its own holes and filtering surface, segmenting the water flow into multiple parallel paths. This segmentation ensures consistent flow distribution and reliable extraction without requiring complex additional components.
2Ease of manufacture
If a single-cone filter design is used, then the manufacturing process is simple, but caking and uneven saturation occur
Solution Approach 1:
The filter surface is segmented into multiple mini-cone units distributed in a waffle pattern, creating multiple localized filtering zones. This segmentation prevents water from concentrating in one area, eliminating caking and ensuring uniform saturation across the entire coffee bed while maintaining manufacturability through standard forming processes.
Solution Approach 2:
Each mini-cone unit provides localized filtering with optimized hole distribution and cone geometry. The local conical shape promotes downward water flow through the coffee bed, ensuring uniform saturation in each zone. This local quality approach prevents the uneven saturation and caking problems associated with single-cone designs.
3Device complexity
If manual pouring is used, then no additional device is needed, but the process is time-consuming and requires skilled operation
Solution Approach 1:
The device with multiple mini-cone filters enables the system to self-regulate water flow distribution and extraction timing. The geometry and hole distribution of the mini-cones create optimal flow paths that automatically achieve consistent extraction without requiring skilled manual pouring techniques, reducing both time loss and skill requirements.
4Area of stationary object
If a large cone filter is used, then the filter surface area is large, but the extraction of desirable coffee solubles is inconsistent
Solution Approach 1:
Instead of using one large cone filter, the invention segments the total filtering surface area into multiple smaller mini-cone units arranged in a waffle pattern. This segmentation maintains the total effective filtering area while ensuring consistent water distribution across each unit, resulting in reliable and consistent extraction of coffee solubles without the uneven flow problems of single large-cone designs.
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 solution enables consistent production of full-bodied, smooth coffee with optimal extraction rates, minimizing bitter and woody flavors, and achieving remarkable clarity and flavor preservation, with brew times ranging from 3.25 to 4.5 minutes for optimal flavor extraction.
Implementation Method 1
allowing for even hydrostatic pressure distribution and optimal flow
Implementation Method 2
The top section, the filter, middle section, and the bottom section are configured to fit together
Implementation Method 3
a filter with a bottom surface comprising holes
Data Source
AI summary
A filter and multi-part brewing system for making excellent coffee of the pour over type are disclosed. A filter includes a circumferential wall that runs from a top rim to a bottom surface. The bottom surface of the filter is an undulating surface comprising a plurality of mini-cone units arranged in a waffle pattern, the mini-cone units comprising one or more holes. The brewing system comprises multiple sections configured to fit together with a filter and drip holes dimensioned for making excellent coffee.