Portable Espresso Maker With 3D Linkage for Uniform Pressing
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Solution Overview
Problem
Conventional coffee makers, including lever-type espresso machines, are bulky, expensive, inconvenient to use, and inefficient in extracting coffee due to complex structures, long preheating times, and degradation of coffee flavor, while existing methods like Dutch coffee extraction require long waiting times and complex setups.
Innovation Solution
A portable lever-type espresso maker with a mechanical design featuring a drive mechanism and movement unit that includes a cam part, operating lever, and multi-joint linkage system, allowing for simultaneous pressing and lifting actions to apply uniform force for efficient coffee extraction without preheating, using external electric heaters for hot water, and a transparent cylindrical housing for ease of use and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single lever is used in conventional lever-type espresso machines, then the machine structure is simplified, but force is concentrated on the front portion causing the machine to fall forward and the structure becomes unstable
Solution Approach 1:
The patent introduces asymmetric counterweights that offset the asymmetric force application of the single lever. The counterweights are positioned to create balancing moments that prevent the machine from tipping forward when the lever is pressed, thus maintaining stability while preserving the simplified single-lever structure.
Solution Approach 2:
The patent employs counterweights as anti-weight elements to compensate for the forward force concentration caused by the lever mechanism. These counterweights create an opposing moment that stabilizes the machine during operation, allowing the single lever design to function without causing instability.
2Device complexity
If conventional heating elements are used for water heating, then the machine structure is simple, but long preheating periods are required
Solution Approach 1:
The patent incorporates an external electric heater that can preheat water before it enters the brewing chamber. This preliminary heating action occurs outside the main machine structure, allowing the internal system to remain simple while significantly reducing the preheating time required for coffee extraction.
Solution Approach 2:
The patent uses an external electric heater as an intermediary device to perform the heating function. This separate heating unit transfers hot water to the brewing system, allowing the coffee maker itself to maintain a simple structure while achieving rapid heating through the intermediary heating element.
3Device complexity
If paper filters are used in coffee extraction, then the extraction structure is simple, but coffee flavor is degraded due to filtration of oil components
Solution Approach 1:
The patent removes the paper filter component from the extraction system entirely. By eliminating the filtering element, the system allows coffee oils and flavor compounds to pass through naturally during extraction, preserving the full flavor profile while maintaining a simple extraction structure that relies on the coffee grounds and brewing chamber alone.
4Reliability
If lever-type espresso machines are designed with robust mechanisms, then extraction performance is improved, but the machines occupy large spaces and are expensive
Solution Approach 1:
The patent segments the lever mechanism into compact, space-efficient components that maintain the mechanical advantage needed for robust extraction. By optimizing the geometry and arrangement of the lever arms, fulcrum, and associated mechanisms, the system achieves high extraction performance in a reduced footprint suitable for portable or space-constrained applications.
Solution Approach 2:
The patent reconfigures the lever mechanism to utilize vertical space more efficiently rather than requiring large horizontal footprints. By arranging components in a vertically compact configuration, the system maintains robust extraction capabilities while occupying minimal table or counter space.
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 coffee maker provides robust, efficient, and flavorful coffee extraction with reduced size and complexity, enabling easy operation and rapid extraction cycles, overcoming the limitations of traditional machines by applying uniform and strong pressing forces without preheating, while maintaining flavor integrity.
Implementation Method 1
the drive mechanism includes a pair of left and right drive mechanisms, each of the drive mechanisms includes a cam part configured such that a plurality of teeth is formed on a part of a circular arc and an operating lever formed to extend outward from a side of the cam part opposite to the teeth
Implementation Method 2
an operating lever formed to extend outward from a side of the cam part opposite to the teeth
Implementation Method 3
the drive mechanism and the movement unit are coupled to each other in such a manner that a plurality of links is connected from the support strip and an end of the links is connected to the movement unit
Implementation Method 4
a plurality of links is connected from the support strip and an end of the links is connected to the movement unit
Implementation Method 5
a lower portion of the movement unit forms a pressing portion, and a bottom of a housing is closed with a coffee extraction portion and thus a space is formed between the pressing portion and the coffee extraction portion
Implementation Method 6
capable of extracting a coffee liquid through efficient pressing
Implementation Method 7
capable of providing hot water by using an external electric heater without requiring the time required to heat water using a heating element
Data Source
AI summary
According to a coffee maker of the present invention, the multi-joint linkage of a drive mechanism is alternately arranged three-dimensionally in a front-back direction, and thus stronger pressing force may be applied and the pressing force may be uniformly transferred to both sides of the pressing portion. When a user simultaneously presses the drive mechanism with his or her both hands, the pressing force applied by the right drive mechanism and the pressing force applied by the left drive mechanism may be uniformly transferred to the pressing portion without loss, and thus the availability of the pressing force may be increased. The coffee maker according to the present invention is robust, has desirable durability, and may be aesthetically decorated with metal and transparent plastic materials.