French Press Piston Brewing for Uniform Coffee at High Throughput
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Solution Overview
Problem
The French press coffee brewing technique is time-consuming and difficult to control for large-scale coffee production, as it requires manual adjustment of parameters like grind size, water temperature, and brew time, leading to variations in coffee taste from cup to cup.
Innovation Solution
A machine with a chamber and piston assembly that automates the brewing process, allowing precise control of brewing parameters such as water temperature, coffee-to-water ratio, and brew time, while filtering out coffee grounds, enabling uniform taste and faster brewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual French press brewing technique is used, then coffee taste can be good with thorough wetting of grounds, but brewing time is too long and difficult to control for large-scale production
Solution Approach 1:
The patent replaces manual mechanical operations (stirring, pressing, pouring) with an automated piston assembly that mechanically agitates coffee grounds and controls water flow. The piston assembly automates the brewing process, enabling consistent parameter control while dramatically increasing brewing speed for large-scale production.
Solution Approach 2:
The patent implements precise control of brewing parameters including water temperature, coffee-to-water ratio, and brew time through automated mechanisms. The piston assembly controls agitation intensity and duration, while heating elements and timers maintain consistent parameters across multiple batches, ensuring uniform taste while improving productivity.
2Measurement precision
If manual control of brewing parameters is used, then equipment is simple, but precision in controlling grind size, water temperature, and brew time is insufficient leading to taste variation
Solution Approach 1:
The patent replaces manual parameter control with automated systems including a piston assembly for precise agitation control, heating elements for temperature regulation, and timers for brew time management. These mechanical and electronic subsystems work together to maintain precise control over all brewing parameters.
Solution Approach 2:
The patent incorporates feedback mechanisms through timers that monitor brew duration, heating elements that maintain water temperature, and automated piston control that regulates agitation. These feedback systems continuously adjust parameters to maintain optimal brewing conditions, ensuring consistent taste results.
3Reliability
If filter is pressed all the way to bottom of container, then chances of grounds passing through are reduced, but time required for pressing and cleaning increases
Solution Approach 1:
The patent replaces manual filter pressing with an automated piston assembly that applies controlled mechanical force to compact coffee grounds against a filter screen. The piston assembly automatically compacts grounds to optimal density, preventing grounds from passing through while eliminating the need for manual pressing and reducing cleaning time.
Solution Approach 2:
The piston assembly performs multiple functions automatically: it agitates coffee grounds during brewing, compacts spent grounds against the filter screen for efficient separation, and can be easily removed for cleaning. This self-service mechanism ensures ground-free coffee quality without requiring extensive manual intervention or cleaning time.
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 machine produces consistently flavored coffee quickly, suitable for large-scale use, allowing for customizable recipes and easy cleaning, with each cup brewed in approximately a quarter of the time of traditional methods.
Implementation Method 1
The piston assembly is operable to filter a solid such as spent coffee grounds from the brewed beverage by moving in a first direction
Implementation Method 2
The piston assembly is operable to force the filtered beverage out of the chamber by moving in a second direction
Data Source
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AI summary
An embodiment of a machine for brewing a beverage such as coffee includes a chamber (72) and a piston assembly (74) disposed in the chamber. The chamber (72) is operable to receive a liquid such as water and a flavor base such as ground coffee, and to allow the beverage to brew from a mixture of the liquid and the base. The piston assembly (74) is operable to filter a solid such as spent coffee grounds from the brewed beverage by moving in a first direction, and to force the filtered beverage out of the chamber (72) by moving in a second direction. By modifying or automating some or all steps of the French press brewing technique, such a machine may control one or more of the brewing parameters with a level of precision that yields brewed coffee having a uniform taste from cup to cup. Furthermore, such a machine may brew the coffee with a speed that renders the machine suitable for use by establishments that serve significant amounts of coffee.