Modular reconfigurable manually actuated espresso machine
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Solution Overview
Problem
Users are limited to choosing between manual lever and spring lever espresso machines, as existing devices do not allow for reconfiguration between these two types, leading to the need for separate machines, which is impractical due to space and budget constraints.
Innovation Solution
A modularly reconfigurable manually actuated espresso machine that can switch between direct lever and spring lever configurations using identical components, with a compression spring in the spring lever configuration, and data feedback through sensors and wireless communication for improved brewing control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If users purchase separate direct lever and spring lever espresso machines to have both brewing styles, then user control and brewing versatility are improved, but device complexity and space requirements increase
Solution Approach 1:
The espresso machine is designed with a universal brewing chamber and piston assembly that can operate in two distinct modes: direct lever configuration where the lever directly moves the piston, and spring lever configuration where a compression spring mediates between the lever and piston. This multi-functionality allows a single machine to provide both direct lever control and spring lever automation.
Solution Approach 2:
The machine employs a reconfigurable linkage system that dynamically changes its mechanical structure. A removable linkage component can be installed or removed to switch between direct lever mode (linkage connected) and spring lever mode (linkage removed, allowing spring direct engagement). This dynamic reconfiguration enables the system to adapt its mechanical architecture based on the desired brewing style.
2Reliability
If a compression spring is used in spring lever configuration, then repeatable pressure profile is improved, but ease of operation deteriorates due to non-linear force application
Solution Approach 1:
The machine allows dynamic switching between direct lever and spring lever configurations. Users who find the non-linear spring force difficult to control can remove the compression spring and use direct lever mode, where the lever directly moves the piston with linear, predictable force transmission. This dynamic reconfiguration resolves the ease of operation issue while preserving the option for repeatable pressure profiles when needed.
3Ease of operation
If direct lever configuration is used, then user control is improved, but reliability deteriorates due to variability in pressure application
Solution Approach 1:
The system enables users to dynamically select between direct lever mode for maximum control and spring lever mode for consistent pressure profiles. By removing the linkage component, users engage the spring lever configuration where the compression spring provides a repeatable, consistent pressure profile during brewing, eliminating the variability inherent in direct manual lever operation.
4Temperature
If traditional espresso machines require a blank shot to heat the brewing chamber, then temperature stability is improved, but loss of time increases
Solution Approach 1:
The machine incorporates preliminary heating action by designing the brewing chamber and group head as thermally integrated components that heat up simultaneously with the water reservoir during the initial machine warm-up period. This preliminary action ensures the brewing chamber reaches optimal temperature before the first actual brew, eliminating the need for a separate blank shot and reducing preparation 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
Enables users to choose between direct lever and spring lever configurations without needing multiple machines, reducing thermal heat loss, eliminating the need for a 'blank shot' to achieve desired coffee temperature, and improving brewing efficiency by purging air pockets, thus enhancing user control and coffee quality.
Implementation Method 1
The use of the compression spring results in a repeatable pressure profile within the brewing chamber. Spring lever apparatus are commonly seen as preferred for certain scenarios, as they require less attention and eliminate some variability in the production of espresso.
Implementation Method 2
However, the nature of a compression spring, as dictated by Hooke's law, results in a non-linear application of force. Further, it may be desired to apply less pressure at the beginning of the brewing of espresso and increase pressure toward the end of the process.
Implementation Method 3
A direct lever apparatus relies upon the direct input of a user to apply force to a lever which applies pressure within the brewing chamber within which the ground coffee is placed.
Implementation Method 4
Within the brewing chamber, the pressure forces hot water through the ground coffee resulting in the production of the espresso.
Data Source
AI summary
The present invention is directed to an apparatus for producing coffee, espresso for instance, with the capability to be modularly reconfigured for operation as a manual lever operated espresso machine, or alternatively configured as a spring lever operated espresso machine, preferably without the use of specialized tools or the removal or replacement of major components from operational use.